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/**
* This file is part of Haketilo.
*
* Function: Operations on resources and mappings.
*
* Copyright (C) 2021 Wojtek Kosior <koszko@koszko.org>
*
* 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 additional permission under GNU GPL version 3 section 7, you
* may distribute forms of that code without the copy of the GNU
* GPL normally required by section 4, provided you include this
* license notice and, in case of non-source distribution, a URL
* through which recipients can access the Corresponding Source.
* If you modify file(s) with this exception, you may extend this
* exception to your version of the file(s), but you are not
* obligated to do so. If you do not wish to do so, delete this
* exception statement from your version.
*
* 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/>.
*
* I, Wojtek Kosior, thereby promise not to sue for violation of this file's
* license. Although I request that you do not make use of this code in a
* proprietary program, I am not going to enforce this in court.
*/
/*
* Convert ver_str into an array representation, e.g. for ver_str="4.6.13.0"
* return [4, 6, 13, 0].
*/
const parse_version = ver_str => ver_str.split(".").map(n => parseInt(n));
/*
* ver is an array of integers. rev is an optional integer. Produce string
* representation of version (optionally with revision number), like:
* 1.2.3-5
* No version normalization is performed.
*/
const version_string = (ver, rev=0) => ver.join(".") + (rev ? `-${rev}` : "");
#EXPORT version_string
/*
* This function overloads on the number of arguments. If one argument is
* passed, it is an item definition (it need not be complete, only identifier,
* version and, if applicable, revision properties are relevant). If two or
* three arguments are given, they are in order: item identifier, item version
* and item revision.
* Returned is a string identifying this version of item.
*/
function item_id_string(...args) {
let def = args[0]
if (args.length > 1)
def = {identifier: args[0], version: args[1], revision: args[2]};
return !Array.isArray(def.version) ? def.identifier :
`${def.identifier}-${version_string(def.version, def.revision)}`;
}
#EXPORT item_id_string
/* vers should be an array of comparable values. Return the greatest one. */
const max = vals => vals.reduce((v1, v2) => v1 > v2 ? v1 : v2);
/*
* versioned_item should be a dict with keys being version strings and values
* being definitions of the respective versions of a single resource/mapping.
* Example:
* {
* "1": {
* version: [1]//,
* // more stuff
* },
* "1.1": {
* version: [1, 1]//,
* // more stuff
* }
* }
*
* Returns the definition with the highest version.
*/
function get_newest_version(versioned_item)
{
const best_ver = max(Object.keys(versioned_item).map(parse_version));
return versioned_item[version_string(best_ver)];
}
#EXPORT get_newest_version AS get_newest
/*
* Returns true if the argument is a nonempty array of numbers without trailing
* zeros.
*/
function is_valid_version(version) {
return Array.isArray(version) && version.length > 0 &&
version.every(n => typeof n === "number") &&
version[version.length - 1] !== 0;
}
#EXPORT is_valid_version
/*
* item is a definition of a resource or mapping. Yield all file references
* (objects with `file` and `sha256` properties) this definition has.
*/
function* get_used_files(item)
{
for (const file of item.source_copyright)
yield file;
if (item.type === "resource") {
for (const file of item.scripts || [])
yield file;
}
}
#EXPORT get_used_files AS get_files
#IF NEVER
/*
* Note: the functions below were overeagerly written and are not used now but
* might prove useful to once we add more functionalities and are hence kept...
*/
/*
* Clone recursively all objects. Leave other items (arrays, strings) untouched.
*/
function deep_object_copy(object)
{
const orig = {object};
const result = {};
const to_copy = [[orig, {}]];
while (to_copy.length > 0) {
const [object, copy] = to_copy.pop();
for (const [key, value] of Object.entries(object)) {
copy[key] = value;
if (typeof value === "object" && !Array.isArray(value)) {
const value_copy = {};
to_copy.push([value, value_copy]);
copy[key] = value_copy;
}
}
}
return result.orig;
}
/* helper function for normalize_version() */
const version_reductor = (acc, n) => [...(n || acc.length ? [n] : []), ...acc];
/*
* ver is an array of integers. Strip right-most zeroes from ver.
*
* Returns a *new* array. Doesn't modify its argument.
*/
const normalize_version = ver => ver.reduceRight(version_reductor, []);
#ENDIF
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