Intial Commit

nodered/rootfs/data/node_modules/mailsplit/lib/flowed-decoder.js

@@ -0,0 +1,55 @@
+'use strict';
+
+// Helper class to rewrite nodes with specific mime type
+
+const Transform = require('stream').Transform;
+const libmime = require('libmime');
+
+/**
+ * Really bad "stream" transform to parse format=flowed content
+ *
+ * @constructor
+ * @param {String} delSp True if delsp option was used
+ */
+class FlowedDecoder extends Transform {
+    constructor(config) {
+        super();
+        this.config = config || {};
+
+        this.chunks = [];
+        this.chunklen = 0;
+
+        this.libmime = new libmime.Libmime({ Iconv: config.Iconv });
+    }
+
+    _transform(chunk, encoding, callback) {
+        if (!chunk || !chunk.length) {
+            return callback();
+        }
+
+        if (!encoding !== 'buffer') {
+            chunk = Buffer.from(chunk, encoding);
+        }
+
+        this.chunks.push(chunk);
+        this.chunklen += chunk.length;
+
+        callback();
+    }
+
+    _flush(callback) {
+        if (this.chunklen) {
+            let currentBody = Buffer.concat(this.chunks, this.chunklen);
+
+            if (this.config.encoding === 'base64') {
+                currentBody = Buffer.from(currentBody.toString('binary'), 'base64');
+            }
+
+            let content = this.libmime.decodeFlowed(currentBody.toString('binary'), this.config.delSp);
+            this.push(Buffer.from(content, 'binary'));
+        }
+        return callback();
+    }
+}
+
+module.exports = FlowedDecoder;