Merge branch 'CG-151' into 'master'

CG-151: feat(debugLog): write error/debug logs to file in debug mode

See merge request auto-cloud/cloudgraph/sdk!24

Author: tyler-dunkel

src/logger/index.ts

@@ -1,4 +1,5 @@
 import ora, { Ora } from 'ora'
+import fs from 'fs'
 
 export enum LogLevel {
   Silent = -1,
@@ -15,12 +16,16 @@ export class Logger {
   constructor(debug: string) {
     const levelRange = ['-1', '0', '1', '2', '3', '4', '5']
     this.level = levelRange.indexOf(debug) > -1 ? Number(debug) : 3
+    this.errorLogFile = './cg-debug.log'
     this.logger = ora({ isSilent: this.level === LogLevel.Silent })
     this.spinnerMap = {}
+    this.clearLog()
   }
 
   level: LogLevel
 
+  errorLogFile: string
+
   logger: Ora
 
   startText: string
@@ -56,6 +61,18 @@ export class Logger {
     return value
   }
 
+  private clearLog() {
+    if (this.level >= LogLevel.Trace) {
+      fs.writeFileSync(this.errorLogFile, '')
+    }
+  }
+
+  private writeLog(text: string) {
+    if (this.level >= LogLevel.Trace) {
+      fs.appendFileSync(this.errorLogFile, `${text  }\n`)
+    }
+  }
+
   startSpinner(msg): void {
     const instance = this.logger.start(msg)
     this.spinnerMap = {msg, instance}
@@ -99,8 +116,10 @@ export class Logger {
 
   error(msg: string | { [key: string]: any }): void {
     if (this.level >= LogLevel.Error) {
+      const parsedMessage = this.parseMessage(msg)
       this.stopSpinner()
-      this.logger.fail(this.parseMessage(msg))
+      this.logger.fail(parsedMessage)
+      this.writeLog(parsedMessage)
       this.spinnerMap.instance && this.startSpinner(this.spinnerMap.msg)
     } 
   }
@@ -123,8 +142,10 @@ export class Logger {
 
   debug(msg: string | { [key: string]: any }): void {
     if (this.level >= LogLevel.Trace) {
+      const parsedMessage = this.parseMessage(msg)
       this.stopSpinner()
-      this.logger.info(this.parseMessage(msg))
+      this.logger.info(parsedMessage)
+      this.writeLog(parsedMessage)
       this.spinnerMap.instance && this.startSpinner(this.spinnerMap.msg)
     } 
   }