Ading export to CSV feature

src/protocol/csv.js

@@ -0,0 +1,41 @@
+KityMinder.registerProtocol('csv', function(minder) {
+
+	return {
+		fileDescription: 'KityMinder',
+		fileExtension: '.csv',
+		dataType: 'text',
+		mineType: 'text/csv',
+
+		encode: function(json) {
+			const SEP=','
+			const QUOTE='"'
+			const NEWLINE='\n'
+
+			var rootData = json.root
+			/*
+			 * Recursive function to dig into JSON tree and append
+			 * new columns every iteration, and copying the parents in
+			 * previous columns.
+			 * It calls itself every time children exists in JSON and retrieves the title.
+			 */
+			var recFlattenJSON = function (json,prefix){
+				if(json.data.text === undefined){
+					throw "Error in .KM Structure: missing Title!"
+				}
+				var newPrefix = prefix + (prefix ? SEP : "") + QUOTE + json.data.text.replace(/"/g, '\"') + QUOTE;
+				var result = ""
+				if(json.children === undefined || json.children.length == 0){
+					result = newPrefix + NEWLINE
+				}
+				else{
+					json.children.forEach(function (child){
+						result += recFlattenJSON(child, newPrefix)
+					})
+				}
+				return result
+			}
+			var output = recFlattenJSON(rootData, "")
+			return output
+		}
+	};
+});