Structured logging (#8673)

* Implementing structured logging

* Changes to en.json to allow refactor to run.

* Fixing global logger

* Structured logger initalization.

* Add caller.

* Do some log redirection.

* Auto refactor

* Cleaning up l4g reference and removing dependancy.

* Removing junk.

* Copyright headers.

* Fixing tests

* Revert "Changes to en.json to allow refactor to run."

This reverts commit fd8249e99bcad0231e6ea65cd77c32aae9a54026.

* Fixing some auto refactor strangeness and typo.

* Making keys more human readable.

utils/html.go

@@ -6,14 +6,15 @@ package utils
 import (
 	"bytes"
 	"errors"
+	"fmt"
 	"html/template"
 	"io"
 	"path/filepath"
 	"reflect"
 	"sync/atomic"
 
-	l4g "github.com/alecthomas/log4go"
 	"github.com/fsnotify/fsnotify"
+	"github.com/mattermost/mattermost-server/mlog"
 	"github.com/nicksnyder/go-i18n/i18n"
 )
 
@@ -25,7 +26,7 @@ type HTMLTemplateWatcher struct {
 
 func NewHTMLTemplateWatcher(directory string) (*HTMLTemplateWatcher, error) {
 	templatesDir, _ := FindDir(directory)
-	l4g.Debug("Parsing server templates at %v", templatesDir)
+	mlog.Debug(fmt.Sprintf("Parsing server templates at %v", templatesDir))
 
 	ret := &HTMLTemplateWatcher{
 		stop:    make(chan struct{}),
@@ -57,15 +58,15 @@ func NewHTMLTemplateWatcher(directory string) (*HTMLTemplateWatcher, error) {
 				return
 			case event := <-watcher.Events:
 				if event.Op&fsnotify.Write == fsnotify.Write {
-					l4g.Info("Re-parsing templates because of modified file %v", event.Name)
+					mlog.Info(fmt.Sprintf("Re-parsing templates because of modified file %v", event.Name))
 					if htmlTemplates, err := template.ParseGlob(filepath.Join(templatesDir, "*.html")); err != nil {
-						l4g.Error("Failed to parse templates %v", err)
+						mlog.Error(fmt.Sprintf("Failed to parse templates %v", err))
 					} else {
 						ret.templates.Store(htmlTemplates)
 					}
 				}
 			case err := <-watcher.Errors:
-				l4g.Error("Failed in directory watcher %s", err)
+				mlog.Error(fmt.Sprintf("Failed in directory watcher %s", err))
 			}
 		}
 	}()
@@ -110,7 +111,7 @@ func (t *HTMLTemplate) RenderToWriter(w io.Writer) error {
 	}
 
 	if err := t.Templates.ExecuteTemplate(w, t.TemplateName, t); err != nil {
-		l4g.Error(T("api.api.render.error"), t.TemplateName, err)
+		mlog.Error(fmt.Sprintf("Error rendering template %v err=%v", t.TemplateName, err))
 		return err
 	}
 
@@ -134,7 +135,7 @@ func escapeForHtml(arg interface{}) interface{} {
 		}
 		return safeArg
 	default:
-		l4g.Warn("Unable to escape value for HTML template %v of type %v", arg, reflect.ValueOf(arg).Type())
+		mlog.Warn(fmt.Sprintf("Unable to escape value for HTML template %v of type %v", arg, reflect.ValueOf(arg).Type()))
 		return ""
 	}
 }