master > master: code go - entwicklung für interaktiven Modus gestartet

2021-11-03 11:04:59 +01:00
parent 43f5447ed7
commit 893db52d90
11 changed files with 421 additions and 42 deletions
--- a/code/golang/internal/menus/menus.go
+++ b/code/golang/internal/menus/menus.go
@@ -0,0 +1,102 @@
+package menus
+
+/* ---------------------------------------------------------------- *
+ * IMPORTS
+ * ---------------------------------------------------------------- */
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+
+	"ads/internal/core/logging"
+)
+
+/* ---------------------------------------------------------------- *
+ * METHOD show menu
+ * ---------------------------------------------------------------- */
+
+func (menu Menu) ShowMenu() (bool, error) {
+	var (
+		choice string
+		index  int
+		meta   bool
+		quit   bool
+	)
+	var promptMessages []string
+	var options [][2]string
+	var defaultOption string
+	var breaks []int
+
+	// Headline einfügen
+	promptMessages = make([]string, len(menu.PromptMessages))
+	copy(promptMessages, menu.PromptMessages)
+	head := fmt.Sprintf("\033[2m%s\033[0m", strings.Join(menu.Path, " > "))
+	promptMessages = append([]string{head}, promptMessages...)
+
+	// Zurück-Option einfügen
+	defaultOption = fmt.Sprintf("%v", menu.DefaultOption)
+	options = []([2]string){}
+	for i, opt := range menu.Options {
+		key := fmt.Sprintf("%v", i+1)
+		subLabel := opt.SubLabel
+		label := opt.Label
+		if !(subLabel == "") {
+			label = fmt.Sprintf("%v (\033[2m%v\033[0m)", opt.Label, subLabel)
+		}
+		options = append(options, [2]string{key, label})
+	}
+	breaks = []int{len(menu.Options) - 1}
+	if !menu.IsRoot {
+		options = append(options, [2]string{"z", "Zurück zum vorherigen Menü"})
+	}
+	options = append(options, [2]string{"q", "Programm schließen"})
+
+	// User Response immer abfragen und abarbeiten, bis quit/return.
+	performClearScreen := !menu.IsRoot
+	for {
+		if performClearScreen {
+			logging.ClearScreen()
+		}
+		performClearScreen = true
+
+		choice, meta = PromptListOfOptions(promptMessages, options, breaks, defaultOption)
+
+		// Falls quit wählt, -> quit:
+		if (menu.IsRoot && meta) || choice == "q" {
+			return true, nil
+		}
+
+		// Falls User back wählt, -> return:
+		if (!menu.IsRoot && meta) || choice == "z" {
+			return false, nil
+		}
+
+		// sonst führe die assoziierte Methode aus
+		index64, _ := strconv.ParseInt(choice, 10, 64)
+		index = int(index64) - 1
+		if 0 <= index && index < len(menu.Options) {
+			opt := menu.Options[index]
+			// Entweder Untermenü öffnen oder Action ausführen
+			if opt.Submenu != nil {
+				quit, _ = opt.Submenu.ShowMenu()
+				if quit {
+					return true, nil
+				}
+			} else if opt.Action != nil {
+				opt.Action()
+				quit := logging.PromptAnyKeyToContinue()
+				// Falls während der Action der User Meta+D klickt, -> quit:
+				if quit {
+					return true, nil
+				}
+			} else {
+				logging.LogWarn("Option noch nicht implementiert.")
+				quit := logging.PromptAnyKeyToContinue()
+				if quit {
+					return true, nil
+				}
+			}
+		}
+	}
+}