Added logger

src/ext/lib/Logger.js

@@ -0,0 +1,103 @@
+class Logger {
+  constructor(conf) {
+    this.conf = conf;
+    this.history = [];
+    this.startTime = performance.now();
+  }
+
+  clear() {
+    this.log = [];
+    this.startTime = performance.now();
+  }
+
+  setConf(conf) {
+    this.conf = conf;
+  }
+
+  // allow syncing of start times between bg and page scripts.
+  // may result in negative times in the log file, but that doesn't 
+  // really matter
+  getStartTime() {
+    return this.startTime;
+  }
+  setStartTime(startTime) {
+    if (startTime) {
+      this.startTime = startTime;
+    } else {
+      this.startTime = performance.now();
+    }
+  }
+
+  getLogFileString() {
+    let logfileStr = '';
+    let logTs = '';       // number of seconds since extension started on a given page¸
+    for (let i = 0; i < this.history.length; i++) {
+      logTs = ((this.history[i].ts - Math.floor(this.performance.now)) / 3).toFixed(3);
+      logfileStr = `${logfileStr}[@${logTs}] -- ${this.history[i].message}\n`
+    }
+
+    return logfileStr;
+  }
+
+  // level is unused as of now, but this may change in the future
+  log(level, component, ...message) {
+    if (this.conf.logToFile) {
+      if (this.conf.fileOptions[component]) {
+        let ts = performance.now();
+        if (ts <= this.history[this.history.length - 1]) {
+          ts = this.history[this.history.length - 1] + 0.00001;
+        }
+
+        this.history.push({
+          ts: ts,
+          message: JSON.stringify(message),
+        })
+      }
+    }
+    if (this.conf.logToConsole) {
+      if (this.conf.consoleOptions[component]) {
+        console.log(...message);
+      }
+    }
+  }
+
+  // leaves a noticeable mark in the file log at the time it got triggered, as well as
+  // at the intervals of 1s and .5s before the trigger moment
+  cahen() {
+    if (this.conf.logToFile) {
+      let ts = performance.now();
+      let secondMark = ts - 1000;
+      let halfSecondMark = ts - 500;
+      let i = this.history.length();
+
+      // correct ts _after_ secondMark and halfSecondMark were determined
+      if (ts <= this.history[this.history.length - 1]) {
+        ts = this.history[this.history.length - 1] + 0.00001;
+      }
+
+      this.history.push({
+        ts: ts,
+        message: "-------------------------------------- CAHEN --------------------------------------"
+      });
+
+      // find the spot for the half second mark. In this case, we don't really particularly care whether timestamps 
+      // are duped due to cahen warnings
+      while (this.history[i--].ts > halfSecondMark) {}
+      this.history.push({
+        ts: halfSecondMark,
+        message: "-------------------------------------- 0.5s to CAHEN --------------------------------------"
+      });
+
+      // repeat for one second warning
+      while (this.history[i--].ts > secondMark) {}
+      this.history.push({
+        ts: secondMark,
+        message: "-------------------------------------- 1s to CAHEN --------------------------------------"
+      });
+    }
+  }
+
+
+}
+
+export default Logger;