port legacyfox to ecmascript modules

mozilla calls this 'esm-ification'. the last relevant to us modules were
ported in mozilla124[1], so this is our new minimum version. the old
version will likely be compatible with firefox up to version 128esr[2].

static imports are not supported in autoconfig scripts. i tried to keep
the diff as small as possible w.r.t comm-central's final JSMs. because
of this, we don't lazy-load any modules any more, nor provide any lazy
getters, as they would need to be loaded into a `lazy` object instead
the global (`this`) namespace, causing more churn. other than that, the
largest change was removing the now-useless Services.jsm workaround as
well as removing globalGetters for objects already loaded automatically.

[1]: https://hg.mozilla.org/mozilla-central/rev/68ba071ff6fb9978937496f9adc48e378957f594
[2]: bugzil.la/1881890

1 files changed, 109 insertions, 0 deletions

diff --git a/legacy/RDFManifestConverter.sys.mjs b/legacy/RDFManifestConverter.sys.mjs
new file mode 100644
index 0000000..12abd27
--- /dev/null
+++ b/legacy/RDFManifestConverter.sys.mjs
@@ -0,0 +1,109 @@
+ /* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+var EXPORTED_SYMBOLS = ["InstallRDF"];
+
+import {RDFDataSource} from "resource://legacy/RDFDataSource.sys.mjs";
+
+const RDFURI_INSTALL_MANIFEST_ROOT = "urn:mozilla:install-manifest";
+
+function EM_R(aProperty) {
+  return `http://www.mozilla.org/2004/em-rdf#${aProperty}`;
+}
+
+function getValue(literal) {
+  return literal && literal.getValue();
+}
+
+function getProperty(resource, property) {
+  return getValue(resource.getProperty(EM_R(property)));
+}
+
+class Manifest {
+  constructor(ds) {
+    this.ds = ds;
+  }
+
+  static loadFromString(text) {
+    return new this(RDFDataSource.loadFromString(text));
+  }
+
+  static loadFromBuffer(buffer) {
+    return new this(RDFDataSource.loadFromBuffer(buffer));
+  }
+
+  static async loadFromFile(uri) {
+    return new this(await RDFDataSource.loadFromFile(uri));
+  }
+}
+
+export class InstallRDF extends Manifest {
+  _readProps(source, obj, props) {
+    for (let prop of props) {
+      let val = getProperty(source, prop);
+      if (val != null) {
+        obj[prop] = val;
+      }
+    }
+  }
+
+  _readArrayProp(source, obj, prop, target, decode = getValue) {
+    let result = Array.from(source.getObjects(EM_R(prop)),
+                            target => decode(target));
+    if (result.length) {
+      obj[target] = result;
+    }
+  }
+
+  _readArrayProps(source, obj, props, decode = getValue) {
+    for (let [prop, target] of Object.entries(props)) {
+      this._readArrayProp(source, obj, prop, target, decode);
+    }
+  }
+
+  _readLocaleStrings(source, obj) {
+    this._readProps(source, obj, ["name", "description", "creator", "homepageURL"]);
+    this._readArrayProps(source, obj, {
+      locale: "locales",
+      developer: "developers",
+      translator: "translators",
+      contributor: "contributors",
+    });
+  }
+
+  decode() {
+    let root = this.ds.getResource(RDFURI_INSTALL_MANIFEST_ROOT);
+    let result = {};
+
+    let props = ["id", "version", "type", "updateURL", "optionsURL",
+                 "optionsType", "aboutURL", "iconURL",
+                 "bootstrap", "unpack", "strictCompatibility"];
+    this._readProps(root, result, props);
+
+    let decodeTargetApplication = source => {
+      let app = {};
+      this._readProps(source, app, ["id", "minVersion", "maxVersion"]);
+      return app;
+    };
+
+    let decodeLocale = source => {
+      let localized = {};
+      this._readLocaleStrings(source, localized);
+      return localized;
+    };
+
+    this._readLocaleStrings(root, result);
+
+    this._readArrayProps(root, result, {"targetPlatform": "targetPlatforms"});
+    this._readArrayProps(root, result, {"targetApplication": "targetApplications"},
+                         decodeTargetApplication);
+    this._readArrayProps(root, result, {"localized": "localized"},
+                         decodeLocale);
+    this._readArrayProps(root, result, {"dependency": "dependencies"},
+                         source => getProperty(source, "id"));
+
+    return result;
+  }
+}