logger: add console helper to log for both file and console

app/renderer/js/console.js

@@ -0,0 +1,69 @@
+const NodeConsole = require('console').Console;
+const fs = require('fs');
+
+const { app } = require('electron').remote;
+const isDev = require('electron-is-dev');
+
+const browserConsole = console;
+const logDir = `${app.getPath('userData')}/Logs`;
+if (!fs.existsSync(logDir)) {
+  fs.mkdirSync(logDir);
+}
+
+function customConsole(opts, type, ...args) {
+  const { nodeConsole, timestamp } = opts;
+  if (timestamp) {
+    args.unshift(timestamp());
+  }
+
+  if (!isDev) {
+    const nodeConsoleLog = nodeConsole[type] || nodeConsole.log;
+    nodeConsoleLog.apply(null, args);
+  }
+  browserConsole[type].apply(null, args);
+}
+
+function getTimestamp() {
+  const date = new Date();
+  const timestamp =
+    `${date.getMonth()}/${date.getDate()} ` +
+    `${date.getMinutes()}:${date.getSeconds()}`;
+  return timestamp;
+}
+
+function setConsoleProto(type) {
+  Object.defineProperty(this, type, {
+    value(...args) {
+      const { timestamp, nodeConsole } = this;
+      const opts = {
+        timestamp,
+        nodeConsole
+      };
+      customConsole.apply(null, [].concat(opts, type, args));
+    }
+  });
+}
+
+class Console {
+  constructor(opts = {}) {
+    let { timestamp, file } = opts;
+    file = `${logDir}/${file || 'console.log'}`;
+    if (timestamp === true) {
+      timestamp = getTimestamp;
+    }
+
+    const fileStream = fs.createWriteStream(file);
+    const nodeConsole = new NodeConsole(fileStream);
+    this.nodeConsole = nodeConsole;
+    this.timestamp = timestamp;
+    this.setUpConsole();
+  }
+
+  setUpConsole() {
+    for (const type in browserConsole) {
+      setConsoleProto.call(this, type);
+    }
+  }
+}
+
+module.exports = Console;