legacy/RDFManifestConverter.sys.mjs

   1  /* This Source Code Form is subject to the terms of the Mozilla Public
   2  * License, v. 2.0. If a copy of the MPL was not distributed with this
   3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   4 "use strict";
   5
   6 var EXPORTED_SYMBOLS = ["InstallRDF"];
   7
   8 import {RDFDataSource} from "resource://legacy/RDFDataSource.sys.mjs";
   9
  10 const RDFURI_INSTALL_MANIFEST_ROOT = "urn:mozilla:install-manifest";
  11
  12 function EM_R(aProperty) {
  13   return `http://www.mozilla.org/2004/em-rdf#${aProperty}`;
  14 }
  15
  16 function getValue(literal) {
  17   return literal && literal.getValue();
  18 }
  19
  20 function getProperty(resource, property) {
  21   return getValue(resource.getProperty(EM_R(property)));
  22 }
  23
  24 class Manifest {
  25   constructor(ds) {
  26     this.ds = ds;
  27   }
  28
  29   static loadFromString(text) {
  30     return new this(RDFDataSource.loadFromString(text));
  31   }
  32
  33   static loadFromBuffer(buffer) {
  34     return new this(RDFDataSource.loadFromBuffer(buffer));
  35   }
  36
  37   static async loadFromFile(uri) {
  38     return new this(await RDFDataSource.loadFromFile(uri));
  39   }
  40 }
  41
  42 export class InstallRDF extends Manifest {
  43   _readProps(source, obj, props) {
  44     for (let prop of props) {
  45       let val = getProperty(source, prop);
  46       if (val != null) {
  47         obj[prop] = val;
  48       }
  49     }
  50   }
  51
  52   _readArrayProp(source, obj, prop, target, decode = getValue) {
  53     let result = Array.from(source.getObjects(EM_R(prop)),
  54                             target => decode(target));
  55     if (result.length) {
  56       obj[target] = result;
  57     }
  58   }
  59
  60   _readArrayProps(source, obj, props, decode = getValue) {
  61     for (let [prop, target] of Object.entries(props)) {
  62       this._readArrayProp(source, obj, prop, target, decode);
  63     }
  64   }
  65
  66   _readLocaleStrings(source, obj) {
  67     this._readProps(source, obj, ["name", "description", "creator", "homepageURL"]);
  68     this._readArrayProps(source, obj, {
  69       locale: "locales",
  70       developer: "developers",
  71       translator: "translators",
  72       contributor: "contributors",
  73     });
  74   }
  75
  76   decode() {
  77     let root = this.ds.getResource(RDFURI_INSTALL_MANIFEST_ROOT);
  78     let result = {};
  79
  80     let props = ["id", "version", "type", "updateURL", "optionsURL",
  81                  "optionsType", "aboutURL", "iconURL",
  82                  "bootstrap", "unpack", "strictCompatibility"];
  83     this._readProps(root, result, props);
  84
  85     let decodeTargetApplication = source => {
  86       let app = {};
  87       this._readProps(source, app, ["id", "minVersion", "maxVersion"]);
  88       return app;
  89     };
  90
  91     let decodeLocale = source => {
  92       let localized = {};
  93       this._readLocaleStrings(source, localized);
  94       return localized;
  95     };
  96
  97     this._readLocaleStrings(root, result);
  98
  99     this._readArrayProps(root, result, {"targetPlatform": "targetPlatforms"});
 100     this._readArrayProps(root, result, {"targetApplication": "targetApplications"},
 101                          decodeTargetApplication);
 102     this._readArrayProps(root, result, {"localized": "localized"},
 103                          decodeLocale);
 104     this._readArrayProps(root, result, {"dependency": "dependencies"},
 105                          source => getProperty(source, "id"));
 106
 107     return result;
 108   }
 109 }