Add scr.savefile.js to renderer with getter methods

src/renderer/scr.savefile.js

@@ -0,0 +1,45 @@
+var SAVEFILE = function(parsedObj){
+  this.meta = parsedObj.meta;
+  this.meta.users = this.meta.users || {};
+  this.meta.userindex = this.meta.userindex || [];
+  this.meta.servers = this.meta.servers || [];
+  this.meta.channels = this.meta.channels || {};
+  
+  this.data = parsedObj.data;
+};
+
+SAVEFILE.isValid = function(parsedObj){
+  return parsedObj && typeof parsedObj.meta === "object" && typeof parsedObj.data === "object";
+};
+
+SAVEFILE.prototype.getServer = function(index){
+  return this.meta.servers[index] || {
+    name: "<unknown>",
+    type: "ERROR"
+  };
+};
+
+SAVEFILE.prototype.getChannelList = function(){
+  return Object.keys(this.meta.channels).map(key => ({
+    id: key,
+    name: this.meta.channels[key].name,
+    server: this.getServer(this.meta.channels[key].server),
+    msgcount: Object.keys(this.data[key]).length || 0
+  }));
+};
+
+SAVEFILE.prototype.getUser = function(index){
+  return this.meta.users[this.meta.userindex[index]] || { name: "<unknown>" };
+};
+
+SAVEFILE.prototype.getChannelMessageObject = function(channel){
+  return this.data[channel] || [];
+};
+
+SAVEFILE.prototype.getMessage = function(message){
+  return {
+    user: this.getUser(message.u),
+    timestamp: message.t,
+    contents: message.m
+  };
+};