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gaia/apps/email/js/ext/imap/protocol/textparser.js

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+define(
+  [
+    'mimeparser',
+    'mimefuncs',
+    'exports'
+  ],
+  function(
+    MimeParser,
+    mimefuncs,
+    exports
+  ) {
+
+
+/**
+ * Simple wrapper around mimeparser hacks allows us to reuse data from the
+ * BODYSTRUCT request that contained the mime type, etc....
+ *
+ *    var parser = $textparser.TextParser(
+ *      bodyInfo.bodyReps[n]
+ *    );
+ *
+ *    // msg is some stream thing from fetcher
+ *
+ *    msg.on('data', parser.parse.bind(parser));
+ *    msg.on('end', function() {
+ *      var content = parser.complete();
+ *    });
+ *
+ */
+function TextParser(partDef) {
+  this._partDef = partDef;
+  var parser = this._parser = new MimeParser();
+  this._totalBytes = 0;
+
+  // TODO: escape?
+  var charsetPart = '', formatPart = '';
+  if (partDef.params && partDef.params.charset) {
+    charsetPart = '; charset="' + partDef.params.charset.toLowerCase() + '"';
+  }
+
+  if (partDef.params && partDef.params.format) {
+    formatPart = '; format="' + partDef.params.format.toLowerCase() + '"';
+  }
+  parser.write('Content-Type: ' + partDef.type.toLowerCase() +
+               '/' + partDef.subtype.toLowerCase() + charsetPart +
+               formatPart + '\r\n');
+
+  if (partDef.encoding) {
+    parser.write('Content-Transfer-Encoding: ' + partDef.encoding + '\r\n');
+  }
+
+  parser.write('\r\n'); // Finish headers.
+
+  if (partDef.pendingBuffer) {
+    this.parse(partDef.pendingBuffer);
+  }
+}
+
+TextParser.prototype = {
+  parse: function(buffer) {
+    this._totalBytes += buffer.length;
+    this._parser.write(buffer);
+  },
+
+  complete: function() {
+    this._parser.end();
+
+    var str = mimefuncs.charset.decode(this._parser.node.content, 'utf-8');
+
+    return {
+      bytesFetched: this._totalBytes,
+      text: str
+    };
+  }
+};
+
+exports.TextParser = TextParser;
+
+});