it now displays books from the DB!

cmd/manage/main.go

@@ -1,26 +1,113 @@
 package main
 
 import (
+	"context"
 	"fmt"
 	"log"
+	"os"
+	"sync"
 
+	"git.yetaga.in/alazyreader/library/book"
 	"git.yetaga.in/alazyreader/library/config"
+	"git.yetaga.in/alazyreader/library/database"
 	"git.yetaga.in/alazyreader/library/ui"
 	"github.com/gdamore/tcell"
 	"github.com/kelseyhightower/envconfig"
 )
 
+// State holds the UI state keys=>value map and manages access to the map with a mutex
+type State struct {
+	m        sync.Mutex
+	stateMap map[string]interface{}
+}
+
+// key, present
+func (s *State) Get(key string) interface{} {
+	s.m.Lock()
+	defer s.m.Unlock()
+	if s.stateMap == nil {
+		s.stateMap = make(map[string]interface{})
+	}
+	k, ok := s.stateMap[key]
+	if !ok {
+		return nil
+	}
+	return k
+}
+
+// key, value
+func (s *State) Set(key string, value interface{}) {
+	s.m.Lock()
+	defer s.m.Unlock()
+	if s.stateMap == nil {
+		s.stateMap = make(map[string]interface{})
+	}
+	s.stateMap[key] = value
+}
+
 const (
 	IN_MENU = iota
 	IN_BOOK
 )
 
+type EventBookUpdate struct {
+	tcell.EventTime
+	book *book.Book
+}
+
+func NewEventBookUpdate(b *book.Book) *EventBookUpdate {
+	e := &EventBookUpdate{book: b}
+	e.SetEventNow()
+	return e
+}
+
+func (e *EventBookUpdate) Book() *book.Book {
+	return e.book
+}
+
+type EventLoadBook struct {
+	tcell.EventTime
+	ID int
+}
+
+func NewEventLoadBook(id int) *EventLoadBook {
+	e := &EventLoadBook{ID: id}
+	e.SetEventNow()
+	return e
+}
+
 func main() {
 	var c config.Config
 	err := envconfig.Process("library", &c)
 	if err != nil {
 		log.Fatalln(err)
 	}
+
+	// create state
+	state := State{}
+
+	// set up DB connection
+	if c.DBUser == "" || c.DBPass == "" || c.DBHost == "" || c.DBPort == "" || c.DBName == "" {
+		log.Fatalf("vars: %+v", c)
+	}
+	lib, err := database.NewMySQLConnection(c.DBUser, c.DBPass, c.DBHost, c.DBPort, c.DBName)
+	if err != nil {
+		log.Fatalln(err)
+	}
+	err = lib.PrepareDatabase(context.Background())
+	if err != nil {
+		log.Fatalln(err)
+	}
+	_, _, err = lib.RunMigrations(context.Background())
+	if err != nil {
+		log.Fatalln(err)
+	}
+	books, err := lib.GetAllBooks(context.Background())
+	if err != nil {
+		log.Fatalln(err)
+	}
+	state.Set("library", books)
+
 	screen, err := tcell.NewScreen()
 	if err != nil {
 		log.Fatalln(err)
@@ -30,21 +117,23 @@ func main() {
 		log.Fatalln(err)
 	}
 
-	l := ui.NewList([]string{"foo", "bar", "baz"}, 0)
+	l := ui.NewList(Titles(state.Get("library").([]book.Book)), 0)
 	menu := ui.NewBox(
 		"library",
-		[]string{"(q)uit"},
+		[]string{"(n)ew", "(i)mport", "(q)uit"},
 		ui.Contents{{
 			Offsets:   ui.Offsets{Top: 1, Left: 2, Bottom: -2, Right: -2},
 			Container: l,
 		}},
 	)
-	book := ui.NewBookDetails()
+	book := ui.NewBookDetails(&book.Book{
+		Title: "test title",
+	})
 	activeBook := ui.NewBox(
 		"book",
-		[]string{"test"},
+		nil,
 		ui.Contents{{
-			Offsets:   ui.Offsets{Top: 1, Left: 2, Bottom: -2, Right: -2},
+			Offsets:   ui.Offsets{Top: 1, Left: 2, Bottom: 0, Right: 0},
 			Container: book,
 		}},
 	)
@@ -64,16 +153,19 @@ func main() {
 	container.Draw(screen)
 	screen.Sync()
 
-	state := IN_MENU
+	// init UI state
+	state.Set("ui_state", IN_MENU)
 
 	// UI loop
 	for {
 		e := screen.PollEvent()
 		switch v := e.(type) {
 		case *tcell.EventError:
+			fmt.Fprintf(os.Stderr, "%v", v)
 			screen.Beep()
 		case *tcell.EventKey: // input handling
-			if state == IN_MENU {
+			curr := state.Get("ui_state").(int)
+			if curr == IN_MENU {
 				if v.Key() == tcell.KeyUp && l.Selected() > 0 {
 					l.SetSelected(l.Selected() - 1)
 				}
@@ -86,11 +178,12 @@ func main() {
 					return
 				}
 				if v.Key() == tcell.KeyRight {
-					state = IN_BOOK
+					screen.PostEvent(NewEventLoadBook(l.SelectedID()))
+					state.Set("ui_state", IN_BOOK)
 				}
-			} else if state == IN_BOOK {
+			} else if curr == IN_BOOK {
 				if v.Key() == tcell.KeyLeft {
-					state = IN_MENU
+					state.Set("ui_state", IN_MENU)
 				}
 			}
 			screen.Clear()
@@ -100,6 +193,12 @@ func main() {
 			container.SetSize(0, 0, h, w)
 			screen.Clear()
 			container.Draw(screen)
+		case *EventBookUpdate:
+			// TK
+		case *EventLoadBook:
+			book.SetBook(GetBookByID(v.ID, books))
+			screen.Clear()
+			container.Draw(screen)
 		case *tcell.EventInterrupt:
 		case *tcell.EventMouse:
 		case *tcell.EventTime:
@@ -108,3 +207,23 @@ func main() {
 		screen.Show() // repaint
 	}
 }
+
+func Titles(lb []book.Book) []ui.ListKeyValue {
+	r := []ui.ListKeyValue{}
+	for i := range lb {
+		r = append(r, ui.ListKeyValue{
+			Key:   lb[i].ID,
+			Value: lb[i].Title,
+		})
+	}
+	return r
+}
+
+func GetBookByID(id int, lb []book.Book) *book.Book {
+	for i := range lb {
+		if lb[i].ID == id {
+			return &lb[i]
+		}
+	}
+	return &book.Book{}
+}