Split up logger and widget

This allows us to use the logger from the wtf directory
For example when trying to debug sort ordering in focus_tracker

modules/datadog/widget.go

@@ -39,6 +39,7 @@ func NewWidget(app *tview.Application, pages *tview.Pages, settings *Settings) *
 		KeyboardWidget: wtf.NewKeyboardWidget(),
 		TextWidget:     wtf.NewTextWidget(app, settings.common, true),
 
+		app:      app,
 		settings: settings,
 	}
 

modules/gcal/client.go

@@ -19,7 +19,7 @@ import (
 	"time"
 
 	"github.com/wtfutil/wtf/cfg"
-	"github.com/wtfutil/wtf/wtf"
+	"github.com/wtfutil/wtf/utils"
 	"golang.org/x/oauth2"
 	"golang.org/x/oauth2/google"
 	"google.golang.org/api/calendar/v3"
@@ -30,7 +30,7 @@ import (
 func (widget *Widget) Fetch() ([]*CalEvent, error) {
 	ctx := context.Background()
 
-	secretPath, _ := wtf.ExpandHomeDir(widget.settings.secretFile)
+	secretPath, _ := utils.ExpandHomeDir(widget.settings.secretFile)
 
 	b, err := ioutil.ReadFile(secretPath)
 	if err != nil {
@@ -123,7 +123,7 @@ func isAuthenticated() bool {
 }
 
 func (widget *Widget) authenticate() {
-	secretPath, _ := wtf.ExpandHomeDir(widget.settings.secretFile)
+	secretPath, _ := utils.ExpandHomeDir(widget.settings.secretFile)
 
 	b, err := ioutil.ReadFile(secretPath)
 	if err != nil {

modules/gspreadsheets/client.go

@@ -18,6 +18,7 @@ import (
 	"path/filepath"
 	"strings"
 
+	"github.com/wtfutil/wtf/utils"
 	"github.com/wtfutil/wtf/wtf"
 	"golang.org/x/oauth2"
 	"golang.org/x/oauth2/google"
@@ -29,7 +30,7 @@ import (
 func (widget *Widget) Fetch() ([]*sheets.ValueRange, error) {
 	ctx := context.Background()
 
-	secretPath, _ := wtf.ExpandHomeDir(widget.settings.secretFile)
+	secretPath, _ := utils.ExpandHomeDir(widget.settings.secretFile)
 
 	b, err := ioutil.ReadFile(secretPath)
 	if err != nil {

modules/logger/settings.go

@@ -0,0 +1,20 @@
+package logger
+
+import (
+	"github.com/olebedev/config"
+	"github.com/wtfutil/wtf/cfg"
+)
+
+const defaultTitle = "Logger"
+
+type Settings struct {
+	common *cfg.Common
+}
+
+func NewSettingsFromYAML(name string, ymlConfig *config.Config, globalConfig *config.Config) *Settings {
+	settings := Settings{
+		common: cfg.NewCommonSettingsFromModule(name, defaultTitle, ymlConfig, globalConfig),
+	}
+
+	return &settings
+}

modules/logger/widget.go

@@ -0,0 +1,105 @@
+package logger
+
+import (
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/rivo/tview"
+	log "github.com/wtfutil/wtf/logger"
+	"github.com/wtfutil/wtf/wtf"
+)
+
+const maxBufferSize int64 = 1024
+
+type Widget struct {
+	wtf.TextWidget
+
+	app      *tview.Application
+	filePath string
+	settings *Settings
+}
+
+func NewWidget(app *tview.Application, settings *Settings) *Widget {
+	widget := Widget{
+		TextWidget: wtf.NewTextWidget(app, settings.common, true),
+
+		app:      app,
+		filePath: log.LogFilePath(),
+		settings: settings,
+	}
+
+	return &widget
+}
+
+// Refresh updates the onscreen contents of the widget
+func (widget *Widget) Refresh() {
+	if log.LogFileMissing() {
+		return
+	}
+
+	logLines := widget.tailFile()
+
+	widget.app.QueueUpdateDraw(func() {
+		widget.View.SetTitle(widget.CommonSettings.Title)
+		widget.View.SetText(widget.contentFrom(logLines))
+	})
+}
+
+/* -------------------- Unexported Functions -------------------- */
+
+func (widget *Widget) contentFrom(logLines []string) string {
+	str := ""
+
+	for _, line := range logLines {
+		chunks := strings.Split(line, " ")
+
+		if len(chunks) >= 4 {
+			str = str + fmt.Sprintf(
+				"[green]%s[white] [yellow]%s[white] %s\n",
+				chunks[0],
+				chunks[1],
+				strings.Join(chunks[3:], " "),
+			)
+		}
+	}
+
+	return str
+}
+
+func (widget *Widget) tailFile() []string {
+	file, err := os.Open(widget.filePath)
+	if err != nil {
+		return []string{}
+	}
+	defer file.Close()
+
+	stat, err := file.Stat()
+	if err != nil {
+		return []string{}
+	}
+
+	bufferSize := maxBufferSize
+	if maxBufferSize > stat.Size() {
+		bufferSize = stat.Size()
+	}
+
+	startPos := stat.Size() - bufferSize
+
+	buff := make([]byte, bufferSize)
+	_, err = file.ReadAt(buff, startPos)
+	if err != nil {
+		return []string{}
+	}
+
+	logLines := strings.Split(string(buff), "\n")
+
+	// Reverse the array of lines
+	// Offset by two to account for the blank line at the end
+	last := len(logLines) - 2
+	for i := 0; i < len(logLines)/2; i++ {
+		logLines[i], logLines[last-i] = logLines[last-i], logLines[i]
+	}
+
+	return logLines
+}

modules/textfile/widget.go

@@ -14,6 +14,7 @@ import (
 	"github.com/alecthomas/chroma/styles"
 	"github.com/radovskyb/watcher"
 	"github.com/rivo/tview"
+	"github.com/wtfutil/wtf/utils"
 	"github.com/wtfutil/wtf/wtf"
 )
 
@@ -98,7 +99,7 @@ func (widget *Widget) fileName() string {
 }
 
 func (widget *Widget) formattedText() string {
-	filePath, _ := wtf.ExpandHomeDir(widget.CurrentSource())
+	filePath, _ := utils.ExpandHomeDir(widget.CurrentSource())
 
 	file, err := os.Open(filePath)
 	if err != nil {
@@ -129,7 +130,7 @@ func (widget *Widget) formattedText() string {
 }
 
 func (widget *Widget) plainText() string {
-	filePath, _ := wtf.ExpandHomeDir(widget.CurrentSource())
+	filePath, _ := utils.ExpandHomeDir(widget.CurrentSource())
 
 	fmt.Println(filePath)
 
@@ -159,7 +160,7 @@ func (widget *Widget) watchForFileChanges() {
 
 	// Watch each textfile for changes
 	for _, source := range widget.Sources {
-		fullPath, err := wtf.ExpandHomeDir(source)
+		fullPath, err := utils.ExpandHomeDir(source)
 		if err == nil {
 			if err := watch.Add(fullPath); err != nil {
 				log.Fatalln(err)