nitasema  Check-in [75008c4bb6]

	sample  story "example/example.n"  and its  html translation
	"example/example.html"  ("Bone Heresy")  are copyright  2014
	alexis hale, all rights reserved.

	sample  story   "example/spectrum.n"  is   the  intellectual
	property of @sigfig@twitter.com

	the  nitasema  source code  (all  files  in this  repository
	outside the "example" directory) is released under the terms
	of the Affero General Public License; full text below


                    GNU AFFERO GENERAL PUBLIC LICENSE

                       Version 3, 19 November 2007

 Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.

                            Preamble

  The GNU Affero General Public License is a free, copyleft license for
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  The licenses for most software and other practical works are designed
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  When we speak of free software, we are referring to freedom, not
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  Developers that use our General Public Licenses protect your rights
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  The GNU Affero General Public License is designed specifically to
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  An older license, called the Affero General Public License and
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                       TERMS AND CONDITIONS

  0. Definitions.

  "This License" refers to version 3 of the GNU Affero General Public License.

  "Copyright" also means copyright-like laws that apply to other kinds of
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  To "propagate" a work means to do anything with it that, without
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  An interactive user interface displays "Appropriate Legal Notices"
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  1. Source Code.

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  The Corresponding Source need not include anything that users
can regenerate automatically from other parts of the Corresponding
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  The Corresponding Source for a work in source code form is that
same work.

  2. Basic Permissions.

  All rights granted under this License are granted for the term of
copyright on the Program, and are irrevocable provided the stated
conditions are met.  This License explicitly affirms your unlimited
permission to run the unmodified Program.  The output from running a
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  4. Conveying Verbatim Copies.

  You may convey verbatim copies of the Program's source code as you
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keep intact all notices of the absence of any warranty; and give all
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used to limit the access or legal rights of the compilation's users
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  You may convey a covered work in object code form under the terms
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    d) Convey the object code by offering access from a designated
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  A separable portion of the object code, whose source code is excluded
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included in conveying the object code work.

  A "User Product" is either (1) a "consumer product", which means any
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  If you convey an object code work under this section in, or with, or
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if neither you nor any third party retains the ability to install
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been installed in ROM).

  The requirement to provide Installation Information does not include a
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  Corresponding Source conveyed, and Installation Information provided,
in accord with this section must be in a format that is publicly
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source code form), and must require no special password or key for
unpacking, reading or copying.

  7. Additional Terms.

  "Additional permissions" are terms that supplement the terms of this
License by making exceptions from one or more of its conditions.
Additional permissions that are applicable to the entire Program shall
be treated as though they were included in this License, to the extent
that they are valid under applicable law.  If additional permissions
apply only to part of the Program, that part may be used separately
under those permissions, but the entire Program remains governed by
this License without regard to the additional permissions.

  When you convey a copy of a covered work, you may at your option
remove any additional permissions from that copy, or from any part of
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for which you have or can give appropriate copyright permission.

  Notwithstanding any other provision of this License, for material you
add to a covered work, you may (if authorized by the copyright holders of
that material) supplement the terms of this License with terms:

    a) Disclaiming warranty or limiting liability differently from the
    terms of sections 15 and 16 of this License; or

    b) Requiring preservation of specified reasonable legal notices or
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    c) Prohibiting misrepresentation of the origin of that material, or
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  All other non-permissive additional terms are considered "further
restrictions" within the meaning of section 10.  If the Program as you
received it, or any part of it, contains a notice stating that it is
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a further restriction but permits relicensing or conveying under this
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must place, in the relevant source files, a statement of the
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  Additional terms, permissive or non-permissive, may be stated in the
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the above requirements apply either way.

  8. Termination.

  You may not propagate or modify a covered work except as expressly
provided under this License.  Any attempt otherwise to propagate or
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this License (including any patent licenses granted under the third
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  However, if you cease all violation of this License, then your
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provisionally, unless and until the copyright holder explicitly and
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holder fails to notify you of the violation by some reasonable means
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  Moreover, your license from a particular copyright holder is
reinstated permanently if the copyright holder notifies you of the
violation by some reasonable means, this is the first time you have
received notice of violation of this License (for any work) from that
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your receipt of the notice.

  Termination of your rights under this section does not terminate the
licenses of parties who have received copies or rights from you under
this License.  If your rights have been terminated and not permanently
reinstated, you do not qualify to receive new licenses for the same
material under section 10.

  9. Acceptance Not Required for Having Copies.

  You are not required to accept this License in order to receive or
run a copy of the Program.  Ancillary propagation of a covered work
occurring solely as a consequence of using peer-to-peer transmission
to receive a copy likewise does not require acceptance.  However,
nothing other than this License grants you permission to propagate or
modify any covered work.  These actions infringe copyright if you do
not accept this License.  Therefore, by modifying or propagating a
covered work, you indicate your acceptance of this License to do so.

  10. Automatic Licensing of Downstream Recipients.

  Each time you convey a covered work, the recipient automatically
receives a license from the original licensors, to run, modify and
propagate that work, subject to this License.  You are not responsible
for enforcing compliance by third parties with this License.

  An "entity transaction" is a transaction transferring control of an
organization, or substantially all assets of one, or subdividing an
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work results from an entity transaction, each party to that
transaction who receives a copy of the work also receives whatever
licenses to the work the party's predecessor in interest had or could
give under the previous paragraph, plus a right to possession of the
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the predecessor has it or can get it with reasonable efforts.

  You may not impose any further restrictions on the exercise of the
rights granted or affirmed under this License.  For example, you may
not impose a license fee, royalty, or other charge for exercise of
rights granted under this License, and you may not initiate litigation
(including a cross-claim or counterclaim in a lawsuit) alleging that
any patent claim is infringed by making, using, selling, offering for
sale, or importing the Program or any portion of it.

  11. Patents.

  A "contributor" is a copyright holder who authorizes use under this
License of the Program or a work on which the Program is based.  The
work thus licensed is called the contributor's "contributor version".

  A contributor's "essential patent claims" are all patent claims
owned or controlled by the contributor, whether already acquired or
hereafter acquired, that would be infringed by some manner, permitted
by this License, of making, using, or selling its contributor version,
but do not include claims that would be infringed only as a
consequence of further modification of the contributor version.  For
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patent sublicenses in a manner consistent with the requirements of
this License.

  Each contributor grants you a non-exclusive, worldwide, royalty-free
patent license under the contributor's essential patent claims, to
make, use, sell, offer for sale, import and otherwise run, modify and
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  In the following three paragraphs, a "patent license" is any express
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sue for patent infringement).  To "grant" such a patent license to a
party means to make such an agreement or commitment not to enforce a
patent against the party.

  If you convey a covered work, knowingly relying on a patent license,
and the Corresponding Source of the work is not available for anyone
to copy, free of charge and under the terms of this License, through a
publicly available network server or other readily accessible means,
then you must either (1) cause the Corresponding Source to be so
available, or (2) arrange to deprive yourself of the benefit of the
patent license for this particular work, or (3) arrange, in a manner
consistent with the requirements of this License, to extend the patent
license to downstream recipients.  "Knowingly relying" means you have
actual knowledge that, but for the patent license, your conveying the
covered work in a country, or your recipient's use of the covered work
in a country, would infringe one or more identifiable patents in that
country that you have reason to believe are valid.

  If, pursuant to or in connection with a single transaction or
arrangement, you convey, or propagate by procuring conveyance of, a
covered work, and grant a patent license to some of the parties
receiving the covered work authorizing them to use, propagate, modify
or convey a specific copy of the covered work, then the patent license
you grant is automatically extended to all recipients of the covered
work and works based on it.

  A patent license is "discriminatory" if it does not include within
the scope of its coverage, prohibits the exercise of, or is
conditioned on the non-exercise of one or more of the rights that are
specifically granted under this License.  You may not convey a covered
work if you are a party to an arrangement with a third party that is
in the business of distributing software, under which you make payment
to the third party based on the extent of your activity of conveying
the work, and under which the third party grants, to any of the
parties who would receive the covered work from you, a discriminatory
patent license (a) in connection with copies of the covered work
conveyed by you (or copies made from those copies), or (b) primarily
for and in connection with specific products or compilations that
contain the covered work, unless you entered into that arrangement,
or that patent license was granted, prior to 28 March 2007.

  Nothing in this License shall be construed as excluding or limiting
any implied license or other defenses to infringement that may
otherwise be available to you under applicable patent law.

  12. No Surrender of Others' Freedom.

  If conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License.  If you cannot convey a
covered work so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you may
not convey it at all.  For example, if you agree to terms that obligate you
to collect a royalty for further conveying from those to whom you convey
the Program, the only way you could satisfy both those terms and this
License would be to refrain entirely from conveying the Program.

  13. Remote Network Interaction; Use with the GNU General Public License.

  Notwithstanding any other provision of this License, if you modify the
Program, your modified version must prominently offer all users
interacting with it remotely through a computer network (if your version
supports such interaction) an opportunity to receive the Corresponding
Source of your version by providing access to the Corresponding Source
from a network server at no charge, through some standard or customary
means of facilitating copying of software.  This Corresponding Source
shall include the Corresponding Source for any work covered by version 3
of the GNU General Public License that is incorporated pursuant to the
following paragraph.

  Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU General Public License into a single
combined work, and to convey the resulting work.  The terms of this
License will continue to apply to the part which is the covered work,
but the work with which it is combined will remain governed by version
3 of the GNU General Public License.

  14. Revised Versions of this License.

  The Free Software Foundation may publish revised and/or new versions of
the GNU Affero General Public License from time to time.  Such new versions
will be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.

  Each version is given a distinguishing version number.  If the
Program specifies that a certain numbered version of the GNU Affero General
Public License "or any later version" applies to it, you have the
option of following the terms and conditions either of that numbered
version or of any later version published by the Free Software
Foundation.  If the Program does not specify a version number of the
GNU Affero General Public License, you may choose any version ever published
by the Free Software Foundation.

  If the Program specifies that a proxy can decide which future
versions of the GNU Affero General Public License can be used, that proxy's
public statement of acceptance of a version permanently authorizes you
to choose that version for the Program.

  Later license versions may give you additional or different
permissions.  However, no additional obligations are imposed on any
author or copyright holder as a result of your choosing to follow a
later version.

  15. Disclaimer of Warranty.

  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.

  16. Limitation of Liability.

  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.

  17. Interpretation of Sections 15 and 16.

  If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.

                     END OF TERMS AND CONDITIONS

            How to Apply These Terms to Your New Programs

  If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.

  To do so, attach the following notices to the program.  It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.

    <one line to give the program's name and a brief idea of what it does.>
    Copyright (C) <year>  <name of author>

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.

Also add information on how to contact you by electronic and paper mail.

  If your software can interact with users remotely through a computer
network, you should also make sure that it provides a way for users to
get its source.  For example, if your program is a web application, its
interface could display a "Source" link that leads users to an archive
of the code.  There are many ways you could offer source, and different
solutions will be better for different programs; see section 13 for the
specific requirements.

  You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU AGPL, see
<https://www.gnu.org/licenses/>.

# nitasema
nitasema strives to be a versatile interactive fiction generator. it takes a script file and produces a self-contained html file that can be played in a web brower. nitasema has minimal dependencies and is fast. the name is Swahili and means "I will speak."

## dependencies
* a C++11 compiler (default is `clang++`)
* libc
* libstdc++

## building
to build, run `./make.sh` from the root directory.

## file format
the nitasema *.n file format is based on simplified s-exps. it is designed primarily as an intermediate format for a forthcoming GUI editor but in the meantime it's perfectly intelligible to humans to and only slightly verbose.

lines can be commented out with the `;` character. there are currently no multiline comments.

whitespace is used to delimit values and is otherwise insignificant.

the data types are atoms, strings, and lists. strings are delimited by single-quotes (`'`) and can span any number of lines. lists are delimited by `[` and `]`. atoms may contain any character in the ascii range '-' ~ 'z' | 'A' ~ 'Z' and any unicode character outside the ascii range. backslash (`\`) can escape single quotes in a string.

the first term in the *.n file must be a string naming the story. it may be followed by atoms to mark various flags.

### flags
* `by`: sets the author. takes a string argument. currently has no effect on output. (`by 'alexis hale'`)
* `flags`: declares booleans. must be followed by a list of booleans. (`flags [bloodsoaked screaming bleeding]`)
* `vars`: declares variables. must be followed by a list of variables. (`vars [health sanity terror]`)
* `no-select`: disables text selection to make the story seem more app-like.
* `start`: indicates the starting passage. takes an atom argument. required. (`start the-beginning-of-the-end`)

### passages
a [passage name (stylesheet) ...] declaration creates a passage. the first term must be the id of the passage as an atom. optionally a stylesheet name may follow. all following terms must be nodes.

```
[passage the-beginning-of-the-end doom-passage]
```

creates a passage with the id `the-beginning-of-the-end` with stylesheet `doom-passage`. ids are used only in the front end of the compiler and do not appear in the compiled html.

```
[passage the-beginning-of-the-end
	'doom had at long last come to Las Vegas.'
]
```

creates a passage with the id `the-beginning-of-the-end` and adds a text node. all macro nodes regardless of position are evaluated before the passage renders, though macros in conditionals will only be evaluated if the conditional evaluates correctly.

```
[passage the-beginning-of-the-end
	[p 'doom had at long last come to Las Vegas.']
	[p 'soon the mushrooms clouds of thermonuclear armageddon would envelop the globe.']
]
```

instead of creating text nodes, this example creates paragraph nodes. paragraph nodes are a better way to organize text.

to link to another passage, use the `[link id 'title']` node.

```
[passage the-beginning-of-the-end
	[p 'doom had at long last come to Las Vegas.']
	[p 'soon the mushroom clouds of ' [link doooom 'thermonuclear armageddon'] ' would envelop the globe.']
]
```

to create a link to another passage that can only be clicked once (and will afterwards disappear forever), use `action`

```
[passage the-beginning-of-the-end
	[p 'doom had at long last come to Las Vegas.']
	[p 'soon the mushrooms clouds of thermonuclear armageddon would envelop the globe.']
	[p [action make-tea 'make tea.']]
]
```

to set a flag, use the `[set flag]` and `[clear flag]`.

```
[passage doooom
	[set world-destroyed]
	[clear hankering-for-brunch]
	[p 'welp looks like everyone\'s dead now. i hope you learned a'
	   'valuable lesson on the futility of existence.']
]
```

to test a flag, use the `[flag? flag [#t-pred] ([#f-pred])]` node. #f-preds (else clauses) are optional.

```
[passage tea-with-aunt-holly
	[flag? world-destroyed [
		[p 'unfortunately, the world where both all tea in the universe and'
		   'aunt holly were located has been destroyed in thermonuclear'
		   'armageddon.']
		[p 'better luck next time, sport!']
	][
		[clear hankering-for-brunch]
		[p 'you enjoy a lovely evening sipping tea with aunt holly.']
		[p 'you have been cured of <b>HANKERING FOR BRUNCH</b>!']
	]]
]
```
a link can invoke a passage as a subroutine.
```
[passage bed
	[p 'you are in bed.']
	[sub inventory 'inventory']]
[passage bridge
	[p 'you are on the bridge of the Unrelenting Fist of Endless Imperial Wrath.']
	[p 'crew bustle about, trying to make a good impression for your inspection.']
	[sub inventory 'inventory']]
[passage inventory
	[p 'you have <b>HALF-EATEN FISH HEAD</b>, <b>HORRIFIC STENCH</b>, and <b>REGRETS</b>.']
	[p [ret 'back']]]
```
an action can also invoke a subroutine, with the `sub-action` node. its syntax is identical to `action`.

to make nodes appear only once, and not on subsequent views, use `once`
```
[passage start
	[once [[p 'you wake up and immediately wish you hadn\'t, wish you\'d never wake up again.']]]
	[p 'you are in your office.']
	[p 'the papers that need grading are still here.']
	[once [
		[p 'you pick one up, wondering if they could possibly be as bad as you remembered.']
		[p 'they\'re not. they\'re worse.']
	]]
]
```
to create an event that will interrupt the story only on the first click of a link, use `gate`.

```
[passage home
	[p 'you are home with a nice cup of tea.']
	[p [gate fight-monster outside 'go outside.']]
]
[passage outside
	[p 'you admire the splendour of the great outdoors.']
]
[passage fight-monster
	[p 'a dreadful beast covered in the intestines of its victims bursts from the sewers!']
	[p [ret 'kill monster with umbrella.']]
]
```

`once` takes two lists of nodes, the second optional. the second will be displayed on any subsequent visits.
```
[passage offal-gardens
	[once [
		[p 'it is said the offal gardens of betelgeuse must be seen to be believed.']
		[p 'well, they\'re not wrong.']
	][
		[p 'the offal gardens stretch away into the distance. you wish they didn\'t.']
	]]
]
```
## colors

colors may be set by the "colors" declaration. this overrides the default stylesheet.

```
colors [
	bg '#121212'
]
```

the colors that may be changed are `bg`, `fg`, `shadow`, `link`, `hover`, and `shadow-hover`. any valid CSS color specification may be used. `url()` can also be used to set a background image:

```
colors [
	bg 'url(bg.png)'
]
```

## stylesheets

the default stylesheet is set by the `colors` declaration. different passages may have different stylesheets. stylesheets are declared as follows:

```
[style name
	[global-rule 'expression']
	[.link
		[local-rule 'expression']
	]
]
```

"rules" are simply css rules. `[rule 'expression']` is translated to `rule: expression;` at compile time.

anything in the global scope affects the entire passage. to set the background to slowly turn black on passages tagged "doom":

```
[style doom
	[background 'black']
	[transition '10s']
]
```

to style links, use the `.link` selector. to style text, use the `.text` selector.

to suppress the default stylesheet completely, use the `no-style` declaration.

## invocation
```
./nitasema input-file.n > output-file.html
```

the html file can be opened by any browser.

## issues
* code needs major refactoring
* i wrote the entire thing in a 12-hour bout of insanity and was up until 8am working on it, so there's bound to be lots wrong.

## todo
* fully implement all node types
* implement other types of variable assignment besides =
* show line number & context on compile errors, not just parse errors
* add multiline comments
* change colors, stylesheet
* tags
* title screens
* gui??
* enable determining whether a passage was invoked as a subroutine

nitasema is developed by alexis summer hale and released under the GPLv3 license.

namespace compile {
	struct ecompile : public err {
		void print() override {
			std::cerr<<"\e[31;1mcompile error:\e[0m ";
		};
	};
	struct etype : public ecompile {
		enum parser::node::kind expected, got;
		const char* ref;
		etype(enum parser::node::kind e, enum parser::node::kind g, const char* r) {
			expected = e; got = g; ref = r;
		}
		void print() override {
			ecompile::print();
			const static char* types[] = {"null","atom","text","list"};
			std::cerr<<"invalid type: expected \e[1m"<<types[(size_t)expected]<<"\e[0m, got \e[1m"<<types[(size_t)got]<<"\e[0m for "<<ref<<"\n";
		}
	};
	struct einvalid : public ecompile {
		const char* thing, *lit;
		einvalid(const char* t, const char* l) { thing = t; lit = l; }
		void print() override {
			ecompile::print();
			std::cerr<<"invalid "<<thing<<" \""<<lit<<"\"\n";
		}
	};
	struct emissing : public ecompile {
		const char* thing;
		emissing(const char* t) { thing = t; }
		void print() override {
			ecompile::print();
			std::cerr<<"missing \e[1m"<<thing<<"\e[0m\n";
		}
	};
	struct eunrec : public ecompile {
		const char* term;
		eunrec(const char* t) { term = t; }
		void print() override {
			ecompile::print();
			std::cerr<<"unrecognized keyword \""<<term<<"\"\n";
		}
	};
	char* astext(const parser::cons* c, const char* ref = "") {
		if (c->car.kind == parser::node::text) {
			return (char*)c->car.v;
		} else {
			throw etype(parser::node::text,c->car.kind, ref);
		}
	}
	char* asatom(const parser::cons* c, const char* ref = "") {
		if (c->car.kind == parser::node::atom) {
			return (char*)c->car.v;
		} else {
			throw etype(parser::node::atom, c->car.kind, ref);
		}
	}
	parser::cons* aslist(const parser::cons* c, const char* ref = "") {
		if (c->car.kind == parser::node::list) {
			return (parser::cons*)c->car.v;
		} else {
			throw etype(parser::node::list,c->car.kind, ref);
		}
	}
	bool eq(const parser::cons* c, const char* test) {
		return strcmp((char*)c->car.v, test) == 0;
	}
	bool atomeq(const parser::cons* c, const char* test, const char* ref) {
		char* t = asatom(c, ref);
		return strcmp(t,test)==0;
	}
	typedef list<node::node*>* nodelist;

	idt find_id(list<char*>& list, const char* title) {
		idt i = 0;
		for(auto& p : list) {
			if (strcmp(p,title)==0) return i;
			++i;
		}; //else
		throw einvalid("ID", title);
	}

	void pnode(nodelist n, parser::cons* data);
	void linknode(nodelist n, parser::cons* data, bool push, bool action = false);
	void gatenode(nodelist n, parser::cons* data);
	void retnode(nodelist n, parser::cons* data);
	void setnode(nodelist n, parser::cons* data, bool value);
	void flagp(nodelist n, parser::cons* data);
	void oncep(nodelist n, parser::cons* data);
	void container_dispatch(nodelist n, parser::cons* data) {
		for(parser::cons* c = data; c->car.kind != parser::node::null; c=c->cdr) {
			if (c->car.kind == parser::node::text) { //special syntax for text node
				auto& t = n->ref(new node::text);
				t.str = (char*)c->car.v;
			} else if (c->car.kind == parser::node::list) {
				parser::cons* node = aslist(c, "node");
				const char* kind = asatom(node, "node type");
				if (strcmp(kind,"p")==0)			pnode		(n, node->cdr);
				else if (strcmp(kind,"link")==0)	linknode	(n, node->cdr,false);
				else if (strcmp(kind,"action")==0)	linknode	(n, node->cdr,false,true);
				else if (strcmp(kind,"sub-action")==0)	linknode	(n, node->cdr,true,true);
				else if (strcmp(kind,"sub")==0)		linknode	(n, node->cdr,true);
				else if (strcmp(kind,"gate")==0)		gatenode	(n, node->cdr);
				else if (strcmp(kind,"ret")==0)		retnode		(n, node->cdr);
				else if (strcmp(kind,"flag?")==0)	flagp		(n, node->cdr);
				else if (strcmp(kind,"once")==0)	oncep		(n, node->cdr);
				else if (strcmp(kind,"set")==0)		setnode		(n, node->cdr, true);
				else if (strcmp(kind,"clear")==0)	setnode		(n, node->cdr, false);
				

				else if (strcmp(kind,"=")==0)		setnode		(n, node->cdr, false);
				else if (strcmp(kind,"+")==0)		setnode		(n, node->cdr, false);
				else if (strcmp(kind,"-")==0)		setnode		(n, node->cdr, false);
				/*
				else if (strcmp(kind,"=?")==0)	setnode		(n, node->cdr, false);
				else if (strcmp(kind,">=?")==0)	setnode		(n, node->cdr, false);
				else if (strcmp(kind,"<=?")==0)	setnode		(n, node->cdr, false);
				else if (strcmp(kind,">?")==0)	setnode		(n, node->cdr, false);
				else if (strcmp(kind,"<?")==0)	setnode		(n, node->cdr, false);*/
				else {
					throw einvalid("node type",(char*)node->car.v);
				}
			} else {
				throw etype(parser::node::list,c->car.kind,"passage nodes");
			}
		}
	}
	void pnode(nodelist n, parser::cons* data) {
		auto& p = n->ref(new node::par);
		container_dispatch(&p.nodes, data);
	}
	void setnode(nodelist n, parser::cons* data, bool value) {
		auto& p = n->ref(new node::setflag);
		p.flag = find_id(global_story.flags, asatom(data,"flag ID"));
		p.value = value;
		if (data->cdr->car.kind != parser::node::null)
			throw etype(parser::node::null, data->cdr->car.kind, "set nodelist");
	}
	void flagp(nodelist n, parser::cons* data) {
		auto& c = n->ref(new node::test);
		cond::flag* cf = new cond::flag;
		c.condition=cf;
		cf -> flag=find_id(global_story.flags, asatom(data,"flag ID"));
		data=data->cdr;
		container_dispatch(&c.t, aslist(data,"list for #t"));
		data=data->cdr;
		if (data->car.kind != parser::node::null)
			container_dispatch(&c.f, aslist(data,"list for #f"));
	}
	void oncep(nodelist n, parser::cons* data) {
		auto& c = n->ref(new node::once);
		container_dispatch(&c.nodes, aslist(data,"list for #t in once clause"));
		data=data->cdr;
		if (data->car.kind != parser::node::null)
			container_dispatch(&c.after, aslist(data,"list for #f in once clause"));
	}
	struct pref { const char* title; const char* style; parser::cons* data; };
	list<pref> prefs;
	idt find_pref(const char* title) {
		idt i = 0;
		for(auto& p : prefs) {
			if (strcmp(p.title,title)==0) return i;
			++i;
		}; //else
		throw einvalid("passage ID", title);
	}

	// im bad
	struct style { const char* name; parser::cons* data; };
	list<style> styles;
	idt find_style(const char* name) {
		idt i = 0;
		for(auto& s : styles) {
			if(strcmp(s.name, name) == 0) return i;
			++i;
		};
		throw einvalid("style ID", name);
	}

	void linknode(nodelist n, parser::cons* data, bool push, bool action) {
		auto& l = n->ref(new node::link);
		l.push=push;
		l.to=find_pref(asatom(data,"page ID"));
		l.action=action;
		container_dispatch(&l.nodes, data->cdr);
	}
	void gatenode(nodelist n, parser::cons* data) {
		auto& l = n->ref(new node::gate);
		l.gate=find_pref(asatom(data,"gate"));
		l.to=find_pref(asatom(data->cdr,"page ID"));
		container_dispatch(&l.nodes, data->cdr->cdr); // :(
	}
	void retnode(nodelist n, parser::cons* data) {
		auto& l = n->ref(new node::retlink);
		container_dispatch(&l.nodes, data);
	}

	// naively outputs css, definitely want to do more processing here in the future
	// effectful functions are alien and new what happened to me i used to be normal
	string gen_css(style s) {

		string css;
		string global; // ugh
		const char* style_name = s.name;

		//how do i fold in c????
		//its for right? you can iterate with for?
		for(parser::cons* cur = s.data; cur->car.kind != parser::node::null; cur = cur->cdr) {
			parser::cons* slot = (parser::cons*)cur->car.v;
			
			if (slot->cdr->car.kind == parser::node::list) { //global
				const char* slot_name = asatom(slot, "style slot identifier");
				css += string(".") + style_name + " " + slot_name + "{"; //"\n";
				
				for(parser::cons* l = slot->cdr; l->car.kind != parser::node::null; l = l->cdr) {
					parser::cons* elem = (parser::cons*)l->car.v;
					const char* rule = asatom(elem, "css rule");
					const char* expr = astext(elem->cdr, "css expression");
					css += /* "\t" + */ string(rule) + ":" + expr + ";"; // "\n";
				}

				css += "}";
			} else {
				// this is so cheating
				const char* rule = asatom(slot, "css rule");
				const char* expr = astext(slot->cdr, "css expression");
				global += /* "\t" + */ string(rule) + ":" + expr + ";"; // "\n";
			}
		}
		if (!global.empty()) { //ewwww
			css += string(".") + style_name + "{"; //"\n";
			css += global;
			css += "}";
		}
		return css;
	}

	void compile(story& st, parser::cons* root) {
		st.title = astext(root, "title"); //title is always first element
		char* start_at = nullptr;
		for (parser::cons* cur = root->cdr;cur->car.kind!=parser::node::null;cur=cur->cdr) {
			switch (cur->car.kind) {
				case parser::node::atom:
					if (eq(cur,"by")) {
						cur=cur->cdr;
						st.author = astext(cur, "author");
						continue;
					} else if (eq(cur,"default-style")) {
						cur=cur->cdr;
						st.style = asatom(cur, "style");
						continue;
					} else if (eq(cur,"start")) {
						cur=cur->cdr;
						start_at = asatom(cur, "starting passage");
						continue;
					} else if (eq(cur,"flags")) {
						cur=cur->cdr;
						for (parser::cons* lflags = aslist(cur,"flag list");
						lflags->car.kind != parser::node::null; lflags = lflags->cdr) {
							char*& f = ++st.flags;
							f = asatom(lflags, "flag ID");
						}
						continue;
					} else if (eq(cur,"vars")) {
						cur=cur->cdr;
						for (parser::cons* lvars = aslist(cur,"variable list");
						lvars->car.kind != parser::node::null; lvars = lvars->cdr) {
							char*& v = ++st.vars;
							v = asatom(lvars, "variable ID");
						}
						continue;
					} else if (eq(cur,"no-select")) {
						st.noselect=true;
						continue;
					} else if (eq(cur,"colors")) {
						cur=cur->cdr;
						for (parser::cons* lsty = aslist(cur,"default stylesheet");
						lsty->car.kind != parser::node::null; lsty = lsty->cdr) {
							const char* f = asatom(lsty, "element");
							lsty = lsty->cdr;
							if (lsty->car.kind == parser::node::null) {
								throw einvalid("color spec", "(null)");
							}
							if (strcmp(f, "bg")==0) {
								st.colors.bg = astext(lsty, "background color spec");
							} else if (strcmp(f, "fg")==0) {
								st.colors.fg = astext(lsty, "foreground color spec");
							} else if (strcmp(f, "shadow")==0) {
								st.colors.shadow = astext(lsty, "shadow color spec");
							} else if (strcmp(f, "link")==0) {
								st.colors.link = astext(lsty, "link color spec");
							} else if (strcmp(f, "hover")==0) {
								st.colors.hover = astext(lsty, "hover color spec");
							} else if (strcmp(f, "shadow-hover")==0) {
								st.colors.shadowhover = astext(lsty, "shadow hover color spec");
							} else {
								throw einvalid("element", f);
							}
						}
						continue;
					}
					throw eunrec((char*)cur->car.v);
				break;
				case parser::node::list:{
					parser::cons* l = (parser::cons*)cur->car.v;
					if(atomeq(l,"passage","list tag")
					or atomeq(l,"scene",  "list tag")) {
						l=(parser::cons*)l->cdr;
						pref& p = ++prefs;
						p.title=asatom(l,"passage title");
						l=(parser::cons*)l->cdr; //traverse one more, probably a better way to do this?
						/////
						if (l->car.kind == parser::node::atom) {
							p.style=asatom(l,"passage style");
							p.data=l->cdr;
						} else {
							p.style=nullptr;
							p.data=l;
						}
						continue;
					} else if(atomeq(l,"style","list tag")) {
						l=(parser::cons*)l->cdr;
						style& s = ++styles;
						s.name=asatom(l,"style name");
						s.data=l->cdr;
					} else {
						throw einvalid("list tag",(char*)l->car.v);
					}}
				break;
				default:;
			}
		}
		idt i=0;
		if (start_at == nullptr) throw emissing("start passage");
		st.start = find_pref(start_at);

		for (style& s : styles) {
			st.usercss += gen_css(s);
		}

		for (pref& pr : prefs) {
			passage& p = ++st.passages;
			p.id=i;
			p.style=pr.style;
			container_dispatch(&p.nodes, pr.data);
			++i;
		}
	}
}

struct var {
	enum class type {flag, num} type;
	idt id;
	string label;
};
struct value {
	enum class kind { lit, tvar, ptr } kind;
	union {
		signed long lit;
		idt var;
	};
	string js() const {
		stringstream s;
		switch (kind) {
			case kind::lit: s << lit; break;
			case kind::tvar: s << "vars["<<var<<"]"; break;
			case kind::ptr: s << "vars[vars["<<var<<"]]"; break;
		}
		return s.str();
	}
};
namespace cond {
	struct cond {
		virtual string js() const = 0;
	};
	struct flag : public cond {
		idt flag;
		string js() const override {
			stringstream s;
			s << "flags["<<flag<<"] === true";
			return s.str();
		}
	};
	struct var : public cond {
		enum class comp { eq, gt, lt, gte, lte, neq } comp;
		value against;
		idt lhs;

		string js() const override {
			const static char* ops[] = {"===",">","<",">=","<=","!=="};
			stringstream s;
			s << "vars["<<lhs<<"]" << ops[(size_t)comp] << against.js();
			return s.str();
		}
	};
}

namespace constants {
	const char* runtime =
		"var onEnter=[];"
		"function $(elem) {"
		    "return document.getElementById(\"p\" + elem);"
		"}"
		"function in_arr(elem, arr) {"
		    "for (var i = 0; i < arr.length; ++i) {"
		        "if (arr[i] === elem) return true;"
		    "}"
		    "return false;"
		"}"
		"var stack = [];"
		"var once = [];"
		"var styled = [];"
		"var gates = [];"
		"var pos = null;"
		"function show(e) {"
			"$(e).style.display=\"initial\";"
		"}"
		"function hide(e) {"
			"$(e).style.display=\"none\";"
		"}"
		"function gate(id, to, g) {"
			"if (in_arr(id,gates))"
				"goto(to);"
			"else {"
				"stack.push(to);"
				"gates.push(id);"
				"goto(g);"
			"}"
		"}"
		"function goto(div) {"
		    "hide(pos);"
		    "pos = div;"
		    "$(pos).style.display = \"block\";"
		    "if (div in onEnter) {"
		        "onEnter[div]();"
		    "}"
		    "if (div in styled) {"
		    	"document.body.className=styled[div];"
		    "} else {"
		    	"document.body.className=defstyle;"
		    "}"
		"}"
		"function gosub(div) {"
		    "stack.push(pos);"
		    "goto(div);"
		"}"
		"function ret() {"
		    "goto(stack.pop());"
		"}";
}

#include <cassert>
template <typename T> struct stack {
	struct node {
		T val;
		node* last;
	};
	node* top;
	stack() {
		top = nullptr;
	}
	T& operator++() {
		node* newnode = new node;
		newnode->last = top;
		top = newnode;
		return newnode->val;
	}
	T operator--() {
		T v = top->val;
		node* t = top;
		top = top->last;
		delete t;
		return v;
	}
	T& operator*() {
		return top->val;
	}
	void _delnode(node* n) {
		node* next = n->last;
		delete n;
		if (next!=nullptr) _delnode(next);
	}
	~stack() {
		if (top!=nullptr) _delnode(top);
	}
	bool empty() {return top==nullptr;}
};
template <typename T> struct list {
	struct node {
		T val;
		node* next;
	};
	node* front;
	node* back;
	size_t size;
	list() {
		front = nullptr;
		// back = nullptr;
		size = 0;
	}
	template <typename D> D& ref(D* downcast) {
		T& upcast = ++*this;
		upcast = downcast;
		return *downcast;
	}
	T& operator++() {
		node* newnode = new node;
		if (front==nullptr) {
			front=newnode;
			back=newnode;
		} else {
			back->next = newnode;
			back = newnode;
		}
		newnode->next = nullptr;
		size++;
		return newnode->val;
	}
	void operator<<(T elem) {
		auto i = ++*this;
		i=elem;
	}
	struct iterator {
		node* cur;
		void operator++()
			{ cur=cur->next; }
		bool operator!=(iterator i) const
			{ return i.cur != cur; }
		T& operator*() const
			{ return cur->val; }
	};
	iterator operator-=(iterator i) {
		if (front == i.cur) {
			node* saved=front->next;
			delete front;
			front=saved;
			iterator newi = {saved};
			return newi;
		}
		for(node* n = front;n!=nullptr;n=n->next) {
			if (n->next == i.cur) {
				node* saved;

				if (n->next!=nullptr) saved = n->next->next;
				else saved = nullptr;
				--size;
				delete n->next;
				n->next=saved;
				iterator newi = {saved};
				return newi;
			}
		}
		assert(false);
		return i;
	}
	iterator begin() const {
		iterator i = {front};
		return i;
	}
	iterator end() const {
		iterator i = {nullptr};
		return i;
	}
	void _delnode(node* n) {
		node* next = n->next;
		delete n;
		if (next != nullptr)
			_delnode(next);
	}
	~list() {
		if (front!=nullptr)
			_delnode(front);
	}
	bool empty() const { return front==nullptr; }
};

<html><head><meta charset="UTF-8"><style type="text/css">body {cursor: default;background: #29000e;}::selection {background-color: rgba(217, 165, 189, 0.17);}.passage {max-width: 40em;margin: auto;margin-top: 5em;}.text {color: #ff8ab3;text-shadow: 0px 0px 1em #eb0052;font-size: 18pt;font-family: GaramondNo8, serif;font-weight: 100;}.link {color: #ffc2d7;font-weight: bold;cursor: pointer;transition: .2s;}.link:hover {transition: 0s;color: #fff0f5;text-shadow: 0px 0px 1em #ff6198;}* { -webkit-touch-callout: none;-webkit-user-select: none;-khtml-user-select: none;-moz-user-select: none;-ms-user-select: none;user-select: none; } .advanced-styling{background:#29000e;transition:2s;}.memory{background:black;transition:5s;}.dark-memory .text{color:#ff3030;transition:1s;}.dark-memory{background:#100000;transition:1s;}</style><script type="text/javascript">var flags=[];for (var i=0;i<4;++i)flags[i]=false;window.onload=function(){pos=0;goto(0)};var onEnter=[];function $(elem) {return document.getElementById("p" + elem);}function in_arr(elem, arr) {for (var i = 0; i < arr.length; ++i) {if (arr[i] === elem) return true;}return false;}var stack = [];var once = [];var styled = [];var pos = null;function show(e) {$(e).style.display="initial";}function hide(e) {$(e).style.display="none";}function goto(div) {hide(pos);pos = div;$(pos).style.display = "block";if (div in onEnter) {onEnter[div]();}if (div in styled) {document.body.className=styled[div];} else {document.body.className="";}}function gosub(div) {stack.push(pos);goto(div);}function ret() {goto(stack.pop());}onEnter[0] = function(){flags[0] = true;flags[1] = true;};onEnter[1] = function(){if (flags[3] === true) {show("1-cond-0x186f610-t");hide("1-cond-0x186f610-f"); } else {hide("1-cond-0x186f610-t");show("1-cond-0x186f610-f");}if (flags[2] === true) {show("1-cond-0x186fe70-t"); } else {hide("1-cond-0x186fe70-t");}};onEnter[3] = function(){if (flags[2] === true) {show("3-cond-0x1870690-t");hide("3-cond-0x1870690-f"); } else {hide("3-cond-0x1870690-t");show("3-cond-0x1870690-f");}};onEnter[4] = function(){flags[2] = true;};styled[7] = "memory";styled[8] = "memory";styled[9] = "memory";styled[10] = "memory";styled[11] = "memory";styled[12] = "memory";styled[13] = "memory";styled[14] = "dark-memory";styled[15] = "memory";</script><title>Bone Heresy</title></head><body class="advanced-styling"><div class="passage"id="p0"><p class="text">You awake, your head pounding.</p><p class="text">It is dark.</p><p class="text">You remember nothing.</p><p class="text"><span class="link" onclick="goto(3)">Listen</span> to your surroundings</p></div><div class="passage"style="display:none;" id="p1"><p class="text"><span style="display:none;" id="p1-cond-0x186f610-t">You are dressed in dark robes.</span><span style="display:none;" id="p1-cond-0x186f610-f">You are wearing a tank top and a miniskirt.</span></p><p class="text"><span style="display:none;" id="p1-cond-0x186fe70-t">You are spattered with blood.</span></p><span class="link" onclick="ret()">Back</span></div><div class="passage"style="display:none;" id="p2"><p class="text">It is still dark.</p><p class="text">You <span class="link" onclick="goto(6)">remember</span> very little.</p><p class="text"><span class="link" onclick="gosub(1)">You</span> are very cold.</p><p class="text"><span class="link" onclick="goto(3)">Listen</span> to your surroundings</p></div><div class="passage"style="display:none;" id="p3"><span style="display:none;" id="p3-cond-0x1870690-t"><p class="text">Blood drips from pipes far overhead into a bucket.</p></span><span style="display:none;" id="p3-cond-0x1870690-f"><p class="text">You hear a fluid dripping nearby.</p><p class="text">It splashes like it's falling into some sort of <span class="link" onclick="goto(4)">bucket</span> or tank.</p></span><p class="text">You realize you are incredibly hungry and thirsty.</p><p class="text"><span class="link" onclick="goto(5)">Check your pockets</span>.</p></div><div class="passage"style="display:none;" id="p4"><p class="text">You grope for a bucket. Maybe there's water&mdash;</p><p class="text">Your shaking hand finds the bucket and it spills violently. You feel a thick liquid splash against your skin. You smell&mdash;</p><p class="text">Blood.</p><p class="text">Your clothes and skin and splattered with blood.</p><p class="text">You <span class="link" onclick="goto(3)">stumble backwards</span></p></div><div class="passage"style="display:none;" id="p5"><p class="text">You fumble for your pockets. You prod at unyielding fabric for a moment before realizing you're still wearing your miniskirt with the fake pocke&mdash;</p><p class="text">&mdash;still&mdash;</p><p class="text">You begin to <span class="link" onclick="goto(6)">remember</span>.</p></div><div class="passage"style="display:none;" id="p6"><p class="text">It's difficult, like the memories don't want to come back. When they do, they come in flashes. They don't feel like yours.</p><p class="text"><span class="link" onclick="goto(12)">A party.</span></p><p class="text"><span class="link" onclick="goto(10)">A jet-black sky.</span></p><p class="text"><span class="link" onclick="goto(7)">Snarling.</span></p><p class="text">Focus on <span class="link" onclick="goto(2)">what's around you</span></p></div><div class="passage"style="display:none;" id="p7"><p class="text">It was a police raid.</p><p class="text">A press of bodies, huddled against the wall. A roar as the packs filled the street like an endless tide of teeth and claws.</p><p class="text">The relief.</p><p class="text"><span class="link" onclick="goto(8)">They didn't want you</span>.</p></div><div class="passage"style="display:none;" id="p8"><p class="text">A few unlucky people who had stepped out for a smoke were taken. A few neighbors, out staring at the sky, ignoring the warnings bleating out from the radio. Some children, out past curfew. Their blood streaked the streets.</p><p class="text">The police are never clean, but they've been especially vicious since the mating season started.</p><p class="text">But they weren't here for <span class="link" onclick="goto(12)">the party</span>. They were after <span class="link" onclick="goto(9)">someone else</span>.</p></div><div class="passage"style="display:none;" id="p9"><p class="text">Who?</p><p class="text">Nothing.</p><p class="text">You know you knew once. Your memories point at it, the links are all still there, but the thing they're pointing at isn't. Like there's a hole in the middle of your memory, a hole as dark and wrong as the <span class="link" onclick="goto(10)">jet-black sky</span>.</p><p class="text">It feels like something was ripped out of your head.</p><p class="text">Messily.</p><p class="text">Your heart begins racing.</p><p class="text"><span class="link" onclick="goto(6)">You don't want to think about this anymore.</span></p></div><div class="passage"style="display:none;" id="p10"><p class="text">"Do not look at the sky."</p><p class="text">Somewhere a radio was tuned to Approved News 6. For two hours it broadcast the same advisory. "Do not look at the sky." The ever-shifting voice of the announcer had taken on unusual tones of urgency. "Loyal citizens are urgently advised to <em>avoid observing the sky</em>."</p><p class="text"><span class="link" onclick="goto(11)">You looked.</span></p></div><div class="passage"style="display:none;" id="p11"><p class="text">There were no stars. There was no moon. There was only emptiness&mdash;</p><p class="text">No.</p><p class="text">There was something else.</p><p class="text">You can hear your heart thumping in your chest.</p><p class="text"><span class="link" onclick="goto(6)">You don't want to keep thinking about this.</span></p></div><div class="passage"style="display:none;" id="p12"><p class="text">People shouting, laughing, dancing, kissing. A cute girl you laid your eyes on longingly, <span class="link" onclick="goto(15)">but turned away because...</span></p><p class="text">Nothing.</p><p class="text">There was music.</p><p class="text"><span class="link" onclick="goto(13)">It was someone's house.</span></p></div><div class="passage"style="display:none;" id="p13"><p class="text">It was small. The walls were tan.</p><p class="text">Could have been any house.</p><p class="text">Except for that <span class="link" onclick="goto(14)"><em>thing</em></span>.</p></div><div class="passage"style="display:none;" id="p14"><p class="text">The thought is physically painful. You struggle not to vomit.</p><p class="text">There wasn't anything right about <span class="link" onclick="goto(12)">that party</span>, not with that <em>thing</em> and <span class="link" onclick="goto(10)">that sky</span>.</p></div><div class="passage"style="display:none;" id="p15"><p class="text">Who was she?</p><p class="text">You remember her face, her body. Freckled, slim, sexy, <em>ruthless&mdash;</em></p><p class="text">The way she danced was almost inhuman.</p><p class="text"><em>she knew she knew <span class="link" onclick="goto(16)">SHE KNEW</span></em></p></div><div class="passage"style="display:none;" id="p16"><p class="text">...nothing.</p><p class="text"><span class="link" onclick="goto(6)">The spark of memory fades quicker than it flared.</span></p></div></body></html>

'Bone Heresy'
by 'Summer Hale'

start it-is-dark
no-select

colors [
	bg '#29000e'
	fg '#ff8ab3'
	shadow '#eb0052'
	link '#ffc2d7'
	hover '#fff0f5'
	shadow-hover '#ff6198'
]

[style advanced-styling
	[background '#29000e']
	[transition '2s']
]

default-style advanced-styling

flags [
	hungry
	thirsty
	bloodsoaked
	dressed
]

[style memory
	[background 'black']
	[transition '5s']]

[style dark-memory
	[background '#100000']
	[transition '1s']
	[.text
		[color '#ff3030']
		[transition '1s']]
	]

[passage it-is-dark
	[set hungry]
	[set thirsty]
	[p 'You awake, your head pounding.']
	[p 'It is dark.']
	[p 'You remember nothing.']
	[p [link corridor/listen 'Listen'] ' to your surroundings']
]

[passage you
	[p [flag? dressed [
		'You are dressed in dark robes.'
	][
		'You are wearing a tank top and a miniskirt.'
	]]]

	[p [flag? bloodsoaked
		['You are spattered with blood.']
	]]

	[ret 'Back']
]

[passage corridor
	[p 'It is still dark.']
	[p 'You '[link remember/1 'remember'] ' very little.']
	[p [sub you 'You'] ' are very cold.']
	[p [link corridor/listen 'Listen'] ' to your surroundings']
]
[passage corridor/listen
	[flag? bloodsoaked [
		[p 'Blood drips from pipes far overhead into a bucket.']
	][
		[p 'You hear a fluid dripping nearby.']
		[p 'It splashes like it\'s falling into some sort of ' [link bucket 'bucket'] ' or tank.']
	]]
	[p 'You realize you are incredibly hungry and thirsty.']
	[p [link pocket 'Check your pockets'] '.']
]

[passage bucket
	[p 'You grope for a bucket. Maybe there\'s water—']
	[p 'Your shaking hand finds the bucket and it spills violently. You feel a thick liquid splash against your skin. You smell—']
	[p 'Blood.']
	[p 'Your clothes and skin and splattered with blood.']
	[set bloodsoaked]
	[p 'You ' [link corridor/listen 'stumble backwards']]
]

[passage pocket
	[p 'You fumble for your pockets. You prod at unyielding fabric for a moment before realizing you\'re still wearing your miniskirt with the fake pocke—']
	[p '—still—']
	[p 'You begin to ' [link remember/1 'remember'] '.']
]

[passage remember/1
	[p 'It\'s difficult, like the memories don\'t want to come back. When they do, they come in flashes. They don\'t feel like yours.']

	[p [link remember/party 'A party.']]

	[p [link remember/sky 'A jet-black sky.']]

	[p [link remember/snarling 'Snarling.']]

	[p 'Focus on '[link corridor 'what\'s around you']]
]

[passage remember/snarling memory
	[p 'It was a police raid.']
	[p 'A press of bodies, huddled against the wall. A roar as the packs filled the street like an endless tide of teeth and claws.']
	[p 'The relief.']
	[p [link remember/snarling/not-you 'They didn\'t want you'] '.']
]

[passage remember/snarling/not-you memory
	[p 'A few unlucky people who had stepped out for a smoke were taken. A few neighbors, out staring at the sky, ignoring the warnings bleating out from the radio. Some children, out past curfew. Their blood streaked the streets.']
	[p 'The police are never clean, but they\'ve been especially vicious since the mating season started.']
	[p 'But they weren\'t here for ' [link remember/party 'the party']'. They were after ' [link remember/snarling/someone-else 'someone else'] '.']
]

[passage remember/snarling/someone-else memory
	[p 'Who?']
	[p 'Nothing.']
	[p 'You know you knew once. Your memories point at it, the links are all still there, but the thing they\'re pointing at isn\'t. Like there\'s a hole in the middle of your memory, a hole as dark and wrong as the ' [link remember/sky 'jet-black sky'] '.']
	[p 'It feels like something was ripped out of your head.']
	[p 'Messily.']
	[p 'Your heart begins racing.']
	[p [link remember/1 'You don\'t want to think about this anymore.']]
]
[passage remember/sky memory
	[p '"Do not look at the sky."']
	[p 'Somewhere a radio was tuned to Approved News 6. For two hours it broadcast the same advisory. "Do not look at the sky." The ever-shifting voice of the announcer had taken on unusual tones of urgency. "Loyal citizens are urgently advised to <em>avoid observing the sky</em>."']
	[p [link remember/sky/look 'You looked.']]
]
[passage remember/sky/look memory
	[p 'There were no stars. There was no moon. There was only emptiness&mdash;']
	[p 'No.']
	[p 'There was something else.']
	[p 'You can hear your heart thumping in your chest.']
	[p [link remember/1 'You don\'t want to keep thinking about this.']]
]
[passage remember/party memory
	[p 'People shouting, laughing, dancing, kissing. A cute girl you laid your eyes on longingly, ' [link remember/cute-girl 'but turned away because...']]
	[p 'Nothing.']
	[p 'There was music.']
	[p [link remember/house 'It was someone\'s house.']]
]
[passage remember/house memory
	[p 'It was small. The walls were tan.']
	[p 'Could have been any house.']
	[p 'Except for that ' [link remember/thing '<em>thing</em>'] '.']
]
[passage remember/thing dark-memory
	[p 'The thought is physically painful. You struggle not to vomit.']
	[p 'There wasn\'t anything right about '[link remember/party 'that party'] ', not with that <em>thing</em> and ' [link remember/sky 'that sky'] '.']
]
[passage remember/cute-girl memory
	[p 'Who was she?']
	[p 'You remember her face, her body. Freckled, slim, sexy, <em>ruthless&mdash;</em>']
	[p 'The way she danced was almost inhuman.']
	[p '<em>she knew she knew '[link remember/cute-girl/nothing 'SHE KNEW'] '</em>']
]
[passage remember/cute-girl/nothing
	[p '...nothing.']
	[p [link remember/1 'The spark of memory fades quicker than it flared.']]
]

'spectrum'
by 'sigfig'

start opening
no-select

colors [
	bg '#141414'
	fg '#bebebe'
	shadow 'rgb(150, 150, 150)'
	link 'rgb(255, 255, 255)'
	shadow-hover 'rgb(30, 170, 250)'
]

[passage opening
	[p 'the polycarbonate sheet that separates you from the void seems awfully thin now']
	[p 'a small emergency light weakly illuminates your controls']
	[p 'fuck, where\'s that ' [link opening/buttons 'button']]]

[passage opening/buttons
	[p 'you brush your fingers over a panel of manual controls']
	[p [link opening/power 'there it is']]]

[passage opening/power
	[p 'you toggle the aux power on']
	[p 'the generators make a faint whirring noise']
	[p 'the lights above the buttons are dancing']
	[p 'alright, ' [link opening/engine 'main engine']]]

[passage opening/engine
	[p 'the engine rumbles to life and delivers a swift kick to your lower back']
	[p 'you\'re moving forwards now, but the view outside doesn\'t believe it']
	[p 'the ' [link computer/boot 'computers'] ' are booting up']]

[passage computer/boot crt-boot
	[p [link computer/main 'ALTUS CONTROL SYSTEMS']]]

[passage computer/main crt
	[p 'todo']]

[style opening-style
	[background 'rgb(20, 20, 20)']
	[.text
		[font-family 'sans-serif']
		[color 'rgb(190, 190, 190)']
		[text-shadow '0px 0px 0.5em rgb(150, 150, 150)']]
	[.link
		[font-family 'sans-serif']
		[color 'rgb(255, 255, 255)']]
	[.link:hover
		[text-shadow '0px 0px 1em rgb(30, 170, 250)']]]

[style crt-boot
	[background-color '#8cc2ff']
	[.link
		[display 'block']
		[text-align 'center']
		[font-family 'sans-serif']
		[color '#fff']
		[font-size '72pt']
		[text-shadow '0px 0px 2em #fff']]
	[.link:hover
		[text-shadow '0px 0px 2em #fff']]]

[style crt
	[background-color 'rgb(0, 0, 0)']
	[.link
		[display 'block']]
]

#!/usr/bin/env bash

c++ -g -std=c++11 nitasema.cc -o nitasema

CFLAGS=-std=c++11
CXX=c++ $(CFLAGS)
rel:
	$(CXX) nitasema.cc -o nitasema
dbg:
	$(CXX) -g nitasema.cc -o nitasema

#include <iostream>
#include <sstream>
#include <string.h>
#include <fstream>

using std::string;
using std::stringstream;
typedef unsigned int idt;
struct err {
	virtual void print() = 0;
};
bool verbose;
#define log(exp) if(verbose)std::cerr<<"\e[33;1mdebug:\e[0m " exp "\n"

#include "constants.cc"
#include "containers.cc"
#include "cond.cc"
#include "passage.cc"
#include "nodes.cc"
#include "story.cc"
story global_story; ///haaaaack

#include "parser.cc"
#include "compile.cc"

int main(int argc, char** argv) {
	if (argc != 2 && !(argc == 3 && strcmp(argv[2],"--verbose") == 0)) {
		std::cerr << "usage: "<<argv[0]<<" storyfile [--verbose]\n";
		return 1;
	}
	verbose = argc == 3;
	try {
		char* input;
		/* read file */ {	
			std::ifstream t;
			log("opening file "<<argv[1]<<" for reading");
			t.open(argv[1]);
			if (t.is_open()) {
				t.seekg(0,std::ios::end);
				size_t size = t.tellg();
				t.seekg(0,std::iostream::beg);

				input = new char[size+1];
				log("reading file");
				t.read(input, size);
				input[size]=0;

				log("closing file");
				t.close();
			} else {
				std::cerr << "cannot open story file for reading";
				return 2;
			}
		};
		parser::cons root;
		log("parsing input");
		parser::parse(&root, input);
		delete[] input;
		if (verbose) {
			log("successfully parsed file; parser dump");
			root.dump();
		}
		compile::compile(global_story, &root);
		std::cout<<global_story.write()<<'\n';
	} catch (err& e) {
		e.print();
		return 1;
	}

	//std::cout << j.write() << '\n';
}

namespace node {
	struct container_node : public container, public node {
		virtual string html(const passage& p) const override {
			string h;
			for (auto& n : nodes) h += n->html(p);
			return h;
		}
		virtual string js(const passage& p) const override {
			string j;
			for (auto& n : nodes) j += n->js(p);
			return j;
		}
	};
	struct par : public container_node {
		string html(const passage& p) const override {
			string h="<p class=\"text\">";
			h+=container_node::html(p) + "</p>";
			return h;
		}
	};
	struct text : public node {
		string str;
		string html(const passage&) const override {
			return str;
		}
	};
	struct setflag : public node {
		idt flag;
		bool value;
		string js(const passage&) const override {
			stringstream s;
			s<<"flags["<<flag<<"] = "<<(value?"true":"false")<<";";
			return s.str();
		}
	};
	struct assign : public node {
		value lhs, rhs;
		string js(const passage&) const override {
			return lhs.js() + " = " + rhs.js() + ";"; // TODO add other kinds of assignment
		}
	};
	struct once : public node {
		list<node*> nodes, after;
		string html(const passage& p) const override {
			stringstream h;
			h << "<span id=\"p"<<p.id<<"-once-"<<id<<"\">";
			for (auto& n : nodes) h << n->html(p);
			h << "</span>";
			if (!after.empty()) {
				h << "<span style=\"display:none;\" id=\"p"<<p.id<<"-once-"<<id<<"-after\">";
				for (auto& n : after) h<<n->html(p);
				h << "</span>";
			}
			return h.str();
		}
		string js(const passage& p) const override {
			stringstream j;
			j << "if (in_arr("<<id<<",once)) {"
					"hide(\""<<p.id<<"-once-"<<id<<"\");";
					if (!after.empty())
						j<<"show(\""<<p.id<<"-once-"<<id<<"-after\");";
				for (auto& n : after) j<<n->js(p);
			j<<	"} else {"
					"once.push(\""<<id<<"\");"
					"show(\""<<p.id<<"-once-"<<id<<"\");";
					if (!after.empty())
						j<<"hide(\""<<p.id<<"-once-"<<id<<"-after\");";
				for (auto& n : nodes) j<<n->js(p);
			j << "}";
			return j.str();
		};
	};
	struct test : public node {
		list<node*> t;
		list<node*> f;
		cond::cond* condition;
		string html(const passage& p) const override {
			stringstream h;
			h << "<span style=\"display:none;\" id=\"p"<<p.id<<"-cond-"<<id<<"-t\">";
			for (auto& n : t) h << n->html(p);
			h << "</span>";
			if (!f.empty()) {
				h << "<span style=\"display:none;\" id=\"p"<<p.id<<"-cond-"<<id<<"-f\">";
				for (auto& n : f) h<<n->html(p);
				h << "</span>";
			}
			return h.str();
		}
		string js(const passage& p) const override {
			stringstream j;
			j << "if ("<<condition->js()<<") {"
					"show(\""<<p.id<<"-cond-"<<id<<"-t\");";
					if (!f.empty())
						j << "hide(\""<<p.id<<"-cond-"<<id<<"-f\");";
					for (auto& n : t) j<<n->js(p);
			j << " } else {"
					"hide(\""<<p.id<<"-cond-"<<id<<"-t\");";
					if (!f.empty())
						j << "show(\""<<p.id<<"-cond-"<<id<<"-f\");";
					for (auto& n : f) j<<n->js(p);
			j << "}";
			return j.str();
		};
	};
	struct gate : public container_node {
		idt to;
		idt gate;
		string html(const passage& p) const override {
			stringstream s;
			s << "<span class=\"link\" onclick=\"gate("<<id<<","<<to<<","<<gate<<")\">";
			s << container_node::html(p)+"</span>";
			return s.str();
		}
	};
	struct link : public container_node {
		idt to;
		bool push;
		bool action;
		string html(const passage& p) const override {
			stringstream s;
			s << "<span ";
			if (action) s << "id=\"pa"<<id<<"\" ";
			s << "class=\"link\" onclick=\"";
			if (action)
				s << "hide('a"<<id<<"');";
			if (push) {
				s << "gosub("<<to<<")";
			} else {
				s << "goto("<<to<<")";
			}
			s << "\">" << container_node::html(p)+"</span>";
			return s.str();
		}
	};
	struct retlink : public container_node {
		string html(const passage& p) const override {
			string s;
			s += "<span class=\"link\" onclick=\"ret()\">";
			s += container_node::html(p)+"</span>";
			return s;
		}
	};
}

namespace parser {
	bool idcp(char c) {
		return (c >= '-' && c <= 'Z') || (c>='a' && c<='z') || c>127 || c<0; // unicode hack
	}
	bool wsp(char c) {
		return c==' ' || c=='\n' || c=='\t';
	}

	struct eparse : public err {
		const char* pos;
		const char* input;
		enum kind {bad_id_char, unexpected_eof, unrecognized_char} kind;
		eparse(const char* _pos, const char* _input, enum kind _kind) {
			pos=_pos; input=_input; kind=_kind;
		}
		const char* linestart() {
			const char* i;
			for (i = pos; *i != '\n' && i > input; --i);
			if (*i=='\n') return i+1;
			return i;
		}
		size_t linenum() {
			size_t l = 1;
			for (const char *i = input; i<pos; ++i) if (*i=='\n') ++l;
			return l;
		}
		void print() override {
			static const char* err[] = {"invalid character in id", "unexpected end of input",
			"unrecognized character"};
			std::cerr<<"\e[31;1mparse error:\e[0;1m "<<err[(size_t)kind]<<" "<<*pos<<"\e[0m\n";
			std::cerr<<"         \e[1m"<<linenum()<<" : \e[0m";
			const char* ls = linestart();
			for (const char* i = ls; *i!='\n' && *i!=0; ++i) {
				if (i==pos) std::cerr<<"\e[31;1;7m";
				std::cerr<<*i;
				if (i==pos) std::cerr<<"\e[0m";
			}
		}
	};

	struct node {
			enum kind { null = 0, atom, text, list } kind;
			void* v;
	};
	struct cons { node car; cons* cdr;
		void dump() {
			std::cerr << "(";
			if (car.kind == node::null) {
				std::cerr << ")"; return;	
			} else if (car.kind == node::list) {
				std::cerr << "[";
				((cons*)car.v)->dump();
				std::cerr << "]";
			} else if (car.kind == node::text) {
				std::cerr << "\"" << ((char*)car.v) << "\"";
			} else {
				std::cerr << (char*)car.v;;
			}
			std::cerr << " . ";
			cdr->dump();
			std::cerr << ")";
		}
	};

	void parse(cons* root, const char* input) {
		cons* cursor = root;
		string buffer = "";
		stack<cons*> pstack;
		for(const char* i = input;;++i) {
			if (*i==';') //line comment
				while (*i!='\n' && *i!=0) ++i;
			if (wsp(*i)) continue;
			if (idcp(*i)) {
				do {
					if (!idcp(*i)) throw eparse(i,input,eparse::bad_id_char);
					buffer += *i;
				} while(!wsp(i[1]) && i[1]!=']' && i[1]!=0 && i++); // this is it, the evilest thing i've ever done
				cursor->car.kind=node::atom;
				cursor->car.v=new char[buffer.size()+1];
				strcpy((char*)cursor->car.v, buffer.c_str());
				buffer="";
				cursor->cdr = new cons;
				cursor=cursor->cdr;
				continue;
			}
			if (*i==0) {
				cursor->car.kind=node::null;
				if (!pstack.empty()) {
					throw eparse(i,input,eparse::unexpected_eof);
				}
				break;
			}
			if (*i == '[') {
				++pstack = cursor;
				cursor->car.kind = node::list;
				cursor->car.v = new cons;
				cursor = (cons*)cursor->car.v;
				continue;
			}
			if (*i == '\'') {
				++i; while (*i!='\'') {
					if (*i == 0) throw eparse(i,input,eparse::unexpected_eof);
					buffer += *i++;
					if (*i == '\\' ) { buffer+=*++i; ++i; }
				}
				cursor->car.kind = node::text;
				cursor->car.v = new char[buffer.size()+1];
				strcpy((char*)cursor->car.v, buffer.c_str());
				buffer = "";
				cursor->cdr = new cons;
				cursor=cursor->cdr;
				continue;
			}
			if (*i == ']') {
				cursor->car.kind=node::null;
				cursor = --pstack;
				cursor->cdr = new cons;
				cursor = cursor->cdr;
				continue;
			}
			throw eparse(i,input,eparse::unrecognized_char);
		}
	}
}

struct passage;
namespace node {
	struct node {
		virtual string html(const passage&) const {return "";}
		virtual string js(const passage&) const {return "";}
		static size_t makeid() {
			static size_t init = 0;
			return init++;
		}
		size_t id = makeid();
	};
	struct container {
		list<node*> nodes;
	};
}
struct passage : public node::container {
	idt id;
	const char* style;
	string html(bool visible) const {
		stringstream html;
		html << "<div class=\"passage\"";
		if(!visible) html << "style=\"display:none;\" ";
		html << "id=\"p" << id << "\">";
		for (auto& n : nodes) {
			html << n->html(*this);
		}
		html << "</div>";
		return html.str();
	}
	string js() const {
		string j = "";
		for(auto& n : nodes) {
			j += n->js(*this);
		}
		return j;
	}
};

struct story {
	list<char*> flags;
	list<char*> vars;
	list<passage> passages;
	idt start;
	bool noselect;
	bool nostyle;
	const char* style;
	struct {
		string bg, fg, shadow, link, hover, shadowhover;
	} colors;
	story() {
		nostyle = noselect = false;
		style = nullptr;
		// default stylesheet
		colors.bg = "black";
		colors.fg = "#f0f0f0";
		colors.shadow = "#adadad";
		colors.link = "white";
		colors.hover = "#f0ffff";
		colors.shadowhover = "#addede";
	}
	char* title, *author;
	string html() {
		stringstream h;
		idt i = 0; //haaack
		for (passage& p : passages) {
			h << p.html(i==start);
			++i;
		}
		return h.str();
	}
	string js() {
		stringstream j;
		for (passage& p : passages) {
			string jsc = p.js();
			if (p.style != nullptr) {
				j << "styled["<<p.id<<"] = \""<<p.style<<"\";";
			}
			if (jsc != "") {
				j << "onEnter[" << p.id << "] = function(){";
				j << jsc;
				j << "};";
			}
		}
		return j.str();
	}
	string wscript() {
		stringstream j;
		if (!flags.empty()) {
			j << "var flags=[];"
			"for(var i=0;i<"<<flags.size<<";++i)flags[i]=false;";
		}
		if (!vars.empty()) {
			j << "var vars=[];"
			"for(var i=0;i<"<<vars.size<<";++i)vars[i]=0;";
		}
		j << "window.onload=function(){pos="<<start<<";goto("<<start<<")};"; //haaaaaaaaaack
		if (style==nullptr)
			j << "var defstyle = \"\";";
		else
			j << "var defstyle = \"" << style << "\";";
		/* runtime */
		// this is an abjectly shitty way of doing this; in the long term i'd
		// like to add an option that allows storing the runtime separately
		// (i.e. so libraries of games don't duplicate the runtime over & over)
		// but for now this is the best way to do it.
		j << constants::runtime;
		/* end runtime */
		j << js();
		return j.str();
	};

	string usercss;
	string wstyle() {
		string css;
		if (!nostyle) {
			css+="body {"
		    	"cursor: default;"
		   		"background: "+colors.bg+";"
			"}"
			"::selection {"
			    "background-color: rgba(217, 165, 189, 0.17);"
			"}"
			".passage {"
			    "max-width: 40em;"
			    "margin: auto;"
			    "margin-top: 5em;"
			"}"
			".text {"
			    "color: "+colors.fg+";"
			    "text-shadow: 0px 0px 1em "+colors.shadow+";"
			    "font-size: 18pt;"
			    "font-family: GaramondNo8, serif;"
			    "font-weight: 100;"
			"}"
			".link {"
			    "color: "+colors.link+";"
			    "font-weight: bold;"
			    "cursor: pointer;"
			    "transition: .2s;"
			"}"
			".link:hover {"
			    "transition: 0s;"
			    "color: "+colors.hover+";"
			    "text-shadow: 0px 0px 1em "+colors.shadowhover+";"
			"}";
		}
		if (noselect) {
			css+="* { -webkit-touch-callout: none;-webkit-user-select: none;"
			"-khtml-user-select: none;-moz-user-select: none;-ms-user-select: none;"
			"user-select: none; } ";
		}
		css+=usercss;
		return css;
	}
	string write() {
		string h;
		try {
			h += std::string("<html><head><meta charset=\"UTF-8\"><style type=\"text/css\">") + wstyle() + "</style>"
			"<script type=\"text/javascript\">" + wscript() + "</script>"
			+ "<title>" + title + "</title></head><body";
			if (style != nullptr)
				h+=string(" class=\"")+style+"\"";
			h += ">" + html() + "</body></html>";
		} catch (const char* n) {
			exit(1);
		}
		return h;
	}
};