ES6: migrated "links"

.eslintrc.yaml

@@ -17,6 +17,7 @@ globals:
   LRUCache: true
   pako: true
   Raygun: true
+  twttr: true
   wire: true
   z: true
 

app/script/links/LinkPreviewBlackList.js

@@ -0,0 +1,40 @@
+/*
+ * Wire
+ * Copyright (C) 2017 Wire Swiss GmbH
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see http://www.gnu.org/licenses/.
+ *
+ */
+
+'use strict';
+
+window.z = window.z || {};
+window.z.links = z.links || {};
+
+z.links.LinkPreviewBlackList = (function() {
+
+  const BLACKLIST = [
+    'soundcloud',
+    'spotify',
+    'youtu[.]?be',
+    'vimeo',
+  ];
+
+  return {
+    is_blacklisted(url) {
+      return new RegExp(BLACKLIST.join('|')).test(url);
+    },
+  };
+
+})();

app/script/links/LinkPreviewError.js

@@ -0,0 +1,56 @@
+/*
+ * Wire
+ * Copyright (C) 2017 Wire Swiss GmbH
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see http://www.gnu.org/licenses/.
+ *
+ */
+
+'use strict';
+
+window.z = window.z || {};
+window.z.links = z.links || {};
+
+z.links.LinkPreviewError = class LinkPreviewError extends Error {
+  constructor(type) {
+    super();
+    this.name = this.constructor.name;
+    this.stack = (new Error()).stack;
+    this.type = type || z.links.LinkPreviewError.TYPE.UNKNOWN;
+
+    switch (this.type) {
+      case z.links.LinkPreviewError.TYPE.NOT_SUPPORTED:
+        this.message = 'Your client cannot render link previews using Open Graph data.';
+        break;
+      case z.links.LinkPreviewError.TYPE.UNSUPPORTED_TYPE:
+        this.message = 'Open Graph data from the given link does not provide necessary attributes.';
+        break;
+      case z.links.LinkPreviewError.TYPE.NO_DATA_AVAILABLE:
+        this.message = 'Link does not provide Open Graph data.';
+        break;
+      default:
+        this.message = 'Unknown LinkPreviewError';
+    }
+  }
+
+  static get TYPE() {
+    return {
+      BLACKLISTED: 'z.links.LinkPreviewError.TYPE.BLACKLISTED',
+      NO_DATA_AVAILABLE: 'z.links.LinkPreviewError.TYPE.NO_DATA_AVAILABLE',
+      NOT_SUPPORTED: 'z.links.LinkPreviewError.TYPE.NOT_SUPPORTED',
+      UNSUPPORTED_TYPE: 'z.links.LinkPreviewError.TYPE.UNSUPPORTED_TYPE',
+      UNKNOWN: 'z.links.LinkPreviewError.TYPE.UNKNOWN',
+    };
+  }
+};

app/script/links/LinkPreviewHelpers.js

@@ -0,0 +1,53 @@
+/*
+ * Wire
+ * Copyright (C) 2017 Wire Swiss GmbH
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see http://www.gnu.org/licenses/.
+ *
+ */
+
+'use strict';
+
+window.z = window.z || {};
+window.z.links = z.links || {};
+
+z.links.LinkPreviewHelpers = {
+
+  /*
+  Check if the text contains only one link
+
+  @param {String} text
+  */
+  contains_only_link(text) {
+    text = text.trim();
+    const urls = twttr.txt.extractUrls(text);
+    return (urls.length === 1) && (urls[0] === text);
+  },
+
+  /*
+  Get first link and link offset for given text.
+
+   @param {String} text
+  */
+  get_first_link_with_offset(text) {
+    const links = twttr.txt.extractUrls(text);
+    const first_link = links[0];
+
+    if (first_link != null) {
+      let link_offset = text.indexOf(first_link);
+      return [first_link, link_offset];
+    }
+  },
+
+};

app/script/links/LinkPreviewProtoBuilder.js

@@ -0,0 +1,50 @@
+/*
+ * Wire
+ * Copyright (C) 2017 Wire Swiss GmbH
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see http://www.gnu.org/licenses/.
+ *
+ */
+
+'use strict';
+
+window.z = window.z || {};
+window.z.links = z.links || {};
+
+z.links.LinkPreviewProtoBuilder = {
+
+  /*
+  Create Protocol Buffers message for link previews.
+  Open Graph data can be validated through: https://developers.facebook.com/tools/debug/
+
+  @param {Object} data - open graph data
+  @param {string} url - link entered by the user
+  @param {number} offset - starting index of the link
+
+  @returns {z.proto.LinkPreview}
+  */
+  build_from_open_graph_data(data, url, offset = 0) {
+    if (_.isEmpty(data)) {
+      return;
+    }
+
+    data.url = data.url || url;
+
+    if (data.title && data.url) {
+      const preview = new z.proto.Article(data.url || url, data.title, data.description);
+      return new z.proto.LinkPreview(url, offset, preview);
+    }
+  },
+
+};