Create config manager to store part of the config in a json file.

Update the IConfig structure to add new values for API login.

src/config.ts

@@ -0,0 +1,62 @@
+'use strict';
+import os = require('os');
+import fs = require('fs-extra');
+import path = require('path');
+
+const configFile = path.join(process.cwd(), "config.json");
+
+function fileExist(path: string)
+{
+  try
+  {
+    fs.statSync(path);
+    return true;
+  } catch (e)
+  {
+    return false;
+  }
+}
+
+export function load(): IConfigLine
+{
+  if (fileExist(configFile))
+  {
+    const data = fs.readFileSync(configFile, 'utf8');
+    return JSON.parse(data);
+  }
+  
+  return {args: undefined};
+}
+
+export function save(config: IConfig)
+{
+  const tmp = JSON.parse(JSON.stringify(config));
+
+  // Things added by the command line parser
+  tmp.rawArgs = undefined;
+  tmp.options = undefined;
+  tmp._execs = undefined;
+  tmp._args = undefined;
+  tmp._name = undefined;
+  tmp._version = undefined;
+  tmp._versionOptionName = undefined;
+  tmp._events = undefined;
+  tmp._eventsCount = undefined;
+  tmp.args = undefined;
+  tmp.commands = undefined;
+  tmp._allowUnknownOption = undefined;
+
+  // Things we don't want to save
+  tmp.cache = undefined;
+  tmp.episodes = undefined;
+  tmp.series = undefined;
+  tmp.video_format = undefined;
+  tmp.video_quality = undefined;
+  tmp.rebuildcrp = undefined;
+  tmp.batch = undefined;
+  tmp.verbose = undefined;
+  tmp.debug = undefined;
+  tmp.unlog = undefined;
+
+  fs.writeFileSync(configFile, JSON.stringify(tmp, null, '  '));
+}

src/interface/IConfig.d.ts

@@ -20,4 +20,15 @@ interface IConfig {
   verbose?: boolean;
   debug?: boolean;
   retry?: number;
+  // Login options
+  logUsingApi?: boolean;
+  crSessionUrl?: string;
+  crDeviceType?: string;
+  crAPIVersion?: string;
+  crLocale?: string;
+  crSessionKey?: string;
+  crLoginUrl?: string;
+  // Generated values
+  crDeviceId?: string;
+  crSessionId?: string;
 }