// SPDX-License-Identifier: CC0-1.0

// Copyright (C) 2021 Wojtek Kosior
// Available under the terms of Creative Commons Zero v1.0 Universal.

// This is an example index.json file describing Hydrilla site content. As you
// can see, for storing site content information Hydrilla utilizes JSON with an
// additional extension in the form of '//' comments support. Hydrilla shall
// look into each direct subdirectory of the content directory passed to it
// (via a cofig file option). If such subsirectory contains an index.json file,
// Hydrilla shall process it.

// An index.json file conveys definitions of site resources, pattern->payload
// mappings and licenses thereof. The definitions may reference files under
// index.json's containing directory, using relative paths. This is how scripts,
// license texts, etc. are included. Unix paths (using '/' as separator) are
// assumed. It is not allowed for an index.json file to reference files outside
// its directory.

// Certain objects are allowed to contain a "comment" field. Although '//'
// comments can be used in index.json files, they will be stripped when the file
// is processed. If a comment should be included in the JSON definitions served
// by Hydrilla API, it should be put in a "comment" field of the proper object.

// Various kinds of objects contain version information. Version is always an
// array of integers, with major version number being the first array item. When
// applicable, a version is accompanied by a revision field which contains a
// positive integer. If versions specified by arrays of different length need to
// be compared, the shorter array gets padded with zeroes on the right. This
// means that for example version 1.3 could be given as both [1, 3] and
// [1, 3, 0, 0] (aka 1.3.0.0) and either would mean the same.

{
    // Once our json schema changes, this version will change. Our software will
    // be able to handle both current and older formats thanks to this
    // information present in every index.json file. Different schema versions
    // are always incompatible (e.g. a Hydrilla instance that understands schema
    // version 0.2.0.0 will not understand version 0.2.0.1). Schemas that are
    // backwards-compatible will be denoted by a different revision.
    // We will try to make schema version match the version of Hydrilla software
    // that introduced it.
    "schema_version": [0, 2],
    "schema_revision": 1,

    // Copyright of this json file. It's a list of copyright holder information
    // objects. Alternatively, "auto" can be used to make Hydrilla attempt to
    // extract copyright info from the comment at the beginning of the file.
    "copyright":  [
	// There can be multiple entries, one for each co-holder of the
	// copyright.
	{
	    // There can also be multiple years, like ["2021","2023-2024"].
	    "years": ["2021"],
	    // Name of the copyright holder. Depending on the situation it can
	    // be just the first name, name+surname, a company name, a
	    // pseudonym, etc.
	    "holder": "Wojtek Kosior"
	}
    ],

    // License of this json file. Identifier has to be known to Hydrilla. Can
    // be defined either in the same or another index.json file as a "license"
    // item. It is possible to specify license combinations, like:
    // [["Expat", "and", "Apache-2.0"], "or", "GPL-3.0-only"]
    // Alternatively, "auto" can be used to make Hydrilla attempt to extract
    // copyright info from this file's SPDX license identifier.
    "licenses": "CC0-1.0",

    // Where this software/work initially comes from. In some cases (i.e. when
    // the developer of content is also the one who packages it for Hydrilla)
    // this might be the same as "package_url".
    "upstream_url": "https://git.koszko.org/pydrilla/tree/example_content/hello",

    // Where sources for the packaging of this content can be found.
    "package_url": "https://git.koszko.org/pydrilla/tree/example_content/hello",

    // Additional "comment" field can be used if needed.
    // "comment": ""

    // List of actual site resources, pattern->payload mappings and licenses.
    // Each of them is represented by an object. Meta-sites and replacement site
    // interfaces will also belong here once they get implemented.
    "definitions": [
	{
	    // Value of "type" can currently be one of: "resource", "license"
	    // and "mapping". The one we have here, "resource", defines a list
	    // of injectable scripts that can be used as a payload or as a
	    // dependency of another "resource". In the future CSS style sheets
	    // and WASM modules will also be composite parts of a "resource" as
	    // scripts are now.
	    "type": "resource",

	    // Used when referring to this resource in "dependencies" list of
	    // another resource or in "payload" field of a mapping. Should
	    // be consize and can only use a restricted set of characters. It
	    // has to match: [-0-9a-zA-Z]
	    "identifier": "helloapple",

	    // "long_name" should be used to specify a user-friendly alternative
	    // to an identifier. It should generally not collide with a long
	    // name of some resource with a different uuid and also shouldn't
	    // change in-between versions of the same resource, although
	    // exceptions to both rules might be considered. Long name is
	    // allowed to contain arbitrary unicode characters (within reason!).
	    "long_name": "Hello Apple",

	    // Different versions (e.g. 1.0 and 1.3) of the same resource can be
	    // defined in separate index.json files. This makes it easy to
	    // accidently cause an identifier clash. To help detect it, we
	    // require that each resource has a uuid associated with it. Attempt
	    // to define multiple resources with the same identifier and
	    // different uuids will result in an error being reported. Defining
	    // multiple resources with different identifiers and the same uuid
	    // is disallowed for now (it may be later permitted if we consider
	    // it good for some use-case).
	    "uuid": "a6754dcb-58d8-4b7a-a245-24fd7ad4cd68",

	    // Version should match the upstream version of the resource (e.g. a
	    // version of javascript library). Revision number starts as 1 for
	    // each new resource version and gets incremented by 1 each time a
	    // modification to the packaging of this version is done. Hydrilla
	    // will allow multiple definitions of the same resource to load, as
	    // long as their versions differ. Thanks to the "version" and
	    // "revision" fields, clients will know they have to update certain
	    // resource after it has been updated. If multiple definitions of
	    // the same version of given resource are provided, an error is
	    // generated (even if those definitions differ by revision number).
	    "version": [2021, 11, 10],
	    "revision": 1,

	    // A short, meaningful description of what the resource is and/or
	    // what it does.
	    "description": "greets an apple",

	    // If needed, a "comment" field can be added to provide some
	    // additional information.
	    // "comment": "this resource something something",

	    // One should specify the copyright and licensing terms of the
	    // entire package. The format is the same as when specifying these
	    // for the index.json file, except "auto" cannot be used.
	    "copyright": [{"years": ["2021"], "holder": "Wojtek Kosior"}],
	    "licenses": "CC0-1.0",

	    // Resource's "dependencies" array shall contain names of other
	    // resources that (in case of scripts at least) should get evaluated
	    // on a page before this resource's own scripts.
	    "dependencies": ["hello-message"],

	    // Array of javascript files that belong to this resource.
	    "scripts": [
		{
		    // Script name. It should also be a valid file path.
		    "name": "hello.js",
		    // Copyright and license info of a script file can be
		    // specified using the same format as in the case of the
		    // index.json file itself. If "copyright" or "license" is
		    // not provided, Hydrilla assumes it to be the same as the
		    // value specified for the resource itself.
		    "copyright": "auto",
		    "licenses":  "auto"
		}, {
		    "name":   "bye.js"
		}
	    ]
	}, {
	    "type":       "resource",
	    "identifier": "hello-message",
	    "long_name":  "Hello Message",
	    "uuid":       "1ec36229-298c-4b35-8105-c4f2e1b9811e",
	    "version":     [2021, 11, 10],
	    "revision":    2,
	    "description": "define messages for saying hello and bye",
	    "copyright":   [{"years": ["2021"], "holder": "Wojtek Kosior"}],
	    "licenses":    "CC0-1.0",
	    // If "dependencies" is empty, it can also be omitted.
	    // "dependencies": [],
	    "scripts": [{"name": "message.js"}]
	}, {
	    "type": "mapping",

	    // Has similar function to resource's identifier. Should be consize
	    // and can only use a restricted set of characters. It has to match:
	    // [-0-9a-zA-Z]
	    // It can be the same as some resource identifier (those are
	    // different entities and are treated separately).
	    "identifier": "helloapple",

	    // "long name" and "uuid" have the same meaning as in the case of
	    // resources. Uuids of a resource and a mapping can technically be
	    // the same, but it is recommended to avoid even this kind of
	    // repetition.
	    "long_name": "Hello Apple",
	    "uuid": "54d23bba-472e-42f5-9194-eaa24c0e3ee7",

	    // "version" differs from its counterpart in resource in that it has
	    // no accompanying revision number.
	    "version": [2021, 11, 10],

	    // A short, meaningful description of what the mapping does.
	    "description": "causes apple to get greeted on Hydrillabugs issue tracker",

	    // A comment, if necessary.
	    // "comment": "blah blah because bleh"

	    // The "payloads" array specifies, which payloads are to be
	    // applied to which URLs.
	    "payloads": [
		{
		    // Should be a valid Haketilo URL pattern.
		    "pattern": "https://hydrillabugs.koszko.org/***",
		    // Should be the name of an existing resource. The resource
		    // may, but doesn't have to, be defined in the same
		    // index.json file.
		    "payload": "helloapple"
		},
		// More associations may follow.
		{
		    "pattern": "https://hachettebugs.koszko.org/***",
		    "payload": "helloapple"
		}
	    ]
	}, {
	    "type": "license",

	    // Will be used to refer to this license in other places. Should
	    // match the SPDX identifier if possible (despite that, please use
	    // "Expat" instead of "MIT" where possible). Unlike other definition
	    // types, "license" does not allow uuids to be used to avoid license
	    // id clashes. Any attempt to define multiple licenses with the same
	    // id will result in an error being reported.
	    "identifier": "CC0-1.0",

	    // This long name must also be unique among all license definitions.
	    "long_name": "Creative Commons Zero v1.0 Universal",

	    // We don't use "version" in license definitions. We do, however,
	    // use "revision" to indicate changes to the packaging of a license.
	    // Revision should be increased by 1 at each such change.
	    "revision": 2,

	    "legal_text": [
		// Legal text can be available in multiple forms. Usually just
		// plain .txt file is enough, though.
		{
		    // "format" should match an agreed-upon MIME type if
		    // possible.
		    "format": "text/plain",
		    // Value of "file" should be a path relative to the
		    // directory of index.json file.
		    "file":   "cc0.txt"
		}
		// If a markdown version of CC0 was provided, we could add this:
		// {
		//     "format": "text/markdown",
		//     "file": "cc0.md"
		// }
	    ]

	    // If needed, a "comment" field can be added to clarify something.
	    // For example, when definind "Expat" license we could add:
	    //
	    // "comment": "Expat license is the most common form of the license often called \"MIT\". Many other forms of \"MIT\" license exist. Here the name \"Expat\" is used to avoid ambiguity."

	    // If applicable, a "notice" can be included. It shall then be a
	    // path (relative to index.json) to a plain text file with that
	    // notice.
	    //
	    // "notice": "license-notice.txt"
	    //
	    // This is needed for example in case of GNU licenses (both with and
	    // without exceptions). For example,
	    // "GPL-3.0-or-later-with-html-exception" could have the following
	    // in its notice file:
	    //
	    // This program is free software: you can redistribute it and/or
	    // modify it under the terms of the GNU 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 General Public License for more details.
	    //
	    // As a special exception to the GPL, any HTML file which merely
	    // makes function calls to this code, and for that purpose
	    // includes it by reference shall be deemed a separate work for
	    // copyright law purposes.  If you modify this code, you may extend
	    // this exception to your version of the code, but you are not
	    // obligated to do so.  If you do not wish to do so, delete this
	    // exception statement from your version.
	    //
	    // You should have received a copy of the GNU General Public License
	    // along with this program.  If not, see
	    // <https://www.gnu.org/licenses/>.
	}
    ]
}