Move the ModuleValidator from /wtf to /app

app/error_messages.go

@@ -0,0 +1,19 @@
+package app
+
+// This file contains the error messages that get written to the terminal when
+// something goes wrong with the configuration process.
+//
+// As a general rule, if one of these has to be shown the app should then die
+// via os.Exit(1)
+
+import (
+	"fmt"
+
+	"github.com/logrusorgru/aurora"
+)
+
+/* -------------------- Unexported Functions -------------------- */
+
+func displayError(err error) {
+	fmt.Printf("%s %s\n\n", aurora.Red("Error:"), err.Error())
+}

app/module_validator.go

@@ -0,0 +1,59 @@
+package app
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/logrusorgru/aurora"
+	"github.com/wtfutil/wtf/wtf"
+)
+
+type ModuleValidator struct{}
+
+func NewModuleValidator() *ModuleValidator {
+	val := &ModuleValidator{}
+	return val
+}
+
+// Validate rolls through all the enabled widgets and looks for configuration errors.
+// If it finds any it stringifies them, writes them to the console, and kills the app gracefully
+func (val *ModuleValidator) Validate(widgets []wtf.Wtfable) {
+	var errStr string
+	hasErrors := false
+
+	for _, widget := range widgets {
+		var widgetErrStr string
+
+		for _, val := range widget.CommonSettings().Validations() {
+			if val.HasError() {
+				hasErrors = true
+				widgetErrStr += fmt.Sprintf(" - %s\t%s %v\n", val, aurora.Red("Error:"), val.Error())
+			}
+		}
+
+		if widgetErrStr != "" {
+			errStr += fmt.Sprintf(
+				"%s\n",
+				fmt.Sprintf(
+					"%s in %s configuration",
+					aurora.Red("Errors"),
+					aurora.Yellow(
+						fmt.Sprintf(
+							"%s.position",
+							widget.Name(),
+						),
+					),
+				),
+			)
+
+			errStr += widgetErrStr + "\n"
+		}
+	}
+
+	if hasErrors {
+		fmt.Println()
+		fmt.Printf(errStr)
+
+		os.Exit(1)
+	}
+}

app/wtf_app.go

@@ -24,6 +24,7 @@ type WtfApp struct {
 	focusTracker   FocusTracker
 	isCustomConfig bool
 	pages          *tview.Pages
+	validator      *ModuleValidator
 	widgets        []wtf.Wtfable
 }
 
@@ -40,12 +41,13 @@ func NewWtfApp(app *tview.Application, config *config.Config, configFilePath str
 	wtfApp.widgets = maker.MakeWidgets(wtfApp.app, wtfApp.pages, wtfApp.config)
 	wtfApp.display = NewDisplay(wtfApp.widgets, wtfApp.config)
 	wtfApp.focusTracker = NewFocusTracker(wtfApp.app, wtfApp.widgets, wtfApp.config)
+	wtfApp.validator = NewModuleValidator()
 
 	wtfApp.pages.AddPage("grid", wtfApp.display.Grid, true, true)
 	wtfApp.app.SetRoot(wtfApp.pages, true)
 	wtfApp.app.SetInputCapture(wtfApp.keyboardIntercept)
 
-	wtf.ValidateWidgets(wtfApp.widgets)
+	wtfApp.validator.Validate(wtfApp.widgets)
 
 	return &wtfApp
 }