Migrate app.State to newer app.StateKey API

Note: this breaks PR #190.

Author: diamondburned

go.mod

@@ -8,7 +8,7 @@ require (
 	github.com/diamondburned/chatkit v0.0.0-20231111052812-ca02e3a0ae01
 	github.com/diamondburned/gotk4-adwaita/pkg v0.0.0-20230307050941-20a05fa3a9df
 	github.com/diamondburned/gotk4/pkg v0.0.6-0.20230825053034-ad325703aa2e
-	github.com/diamondburned/gotkit v0.0.0-20231108044328-9ac96cd5a778
+	github.com/diamondburned/gotkit v0.0.0-20231111065921-0542a145d61e
 	github.com/diamondburned/ningen/v3 v3.0.1-0.20231109131259-9140d0873f98
 	github.com/dustin/go-humanize v1.0.0
 	github.com/enescakir/emoji v1.0.0

go.sum

@@ -41,8 +41,8 @@ github.com/diamondburned/gotk4-adwaita/pkg v0.0.0-20230307050941-20a05fa3a9df h1
 github.com/diamondburned/gotk4-adwaita/pkg v0.0.0-20230307050941-20a05fa3a9df/go.mod h1:f+Kv3QPlRGEW0nv0oyEZ4qhCcOY9qhxKnmPmrzmBkLo=
 github.com/diamondburned/gotk4/pkg v0.0.6-0.20230825053034-ad325703aa2e h1:fH47UZxCz7xvmJHQ1w+nizBZpDNHdYmHwMwnUAByaLg=
 github.com/diamondburned/gotk4/pkg v0.0.6-0.20230825053034-ad325703aa2e/go.mod h1:Jr5xzUuGyLsoMtE9LzE/Lay1gD0ONiFWAmQ0+Z6KLeA=
-github.com/diamondburned/gotkit v0.0.0-20231108044328-9ac96cd5a778 h1:Zu0e0YUhoz9IknVI1NfYPSV2qbsRevdrcrgISSmiJVA=
-github.com/diamondburned/gotkit v0.0.0-20231108044328-9ac96cd5a778/go.mod h1:N9XvN0kELfwPD/6qn1tEZIhni1vphE91lo7Pn0CxA+Q=
+github.com/diamondburned/gotkit v0.0.0-20231111065921-0542a145d61e h1:Ck/mTbJsDIrKKgZA5b91eJ7B5VNGaoYqwNSUZJig0Eg=
+github.com/diamondburned/gotkit v0.0.0-20231111065921-0542a145d61e/go.mod h1:N9XvN0kELfwPD/6qn1tEZIhni1vphE91lo7Pn0CxA+Q=
 github.com/diamondburned/ningen/v3 v3.0.1-0.20231109131259-9140d0873f98 h1:X6MZzOCMwLCUh193M6k66NARFIGy1fxWuINSOgBsYOI=
 github.com/diamondburned/ningen/v3 v3.0.1-0.20231109131259-9140d0873f98/go.mod h1:PUr2nk5xo+A5hguLIe6qJzCFhTJxdN5/1i7Lr8iCWpQ=
 github.com/dlclark/regexp2 v1.4.0 h1:F1rxgk7p4uKjwIQxBs9oAXe5CqrXlCduYEJvrF4u93E=

internal/message/composer/input.go

@@ -71,6 +71,9 @@ var inputWYSIWYG = prefs.NewBool(true, prefs.PropMeta{
 	Description: "Enable a semi-WYSIWYG feature that decorates the input Markdown text.",
 })
 
+// inputStateKey is the app state that stores the last input message.
+var inputStateKey = app.NewStateKey[string]("input-state")
+
 // NewInput creates a new Input widget.
 func NewInput(ctx context.Context, ctrl InputController, chID discord.ChannelID) *Input {
 	i := Input{
@@ -119,12 +122,12 @@ func NewInput(ctx context.Context, ctrl InputController, chID discord.ChannelID)
 		start, end := i.Buffer.Bounds()
 
 		// Persist input.
-		cfg := app.AcquireState(ctx, "input-state")
+		inputState := inputStateKey.Acquire(ctx)
 		if end.Offset() == 0 {
-			cfg.Delete(chID.String())
+			inputState.Delete(chID.String())
 		} else {
 			text := i.Buffer.Text(start, end, false)
-			cfg.Set(chID.String(), text)
+			inputState.Set(chID.String(), text)
 		}
 	})
 
@@ -133,10 +136,10 @@ func NewInput(ctx context.Context, ctrl InputController, chID discord.ChannelID)
 	i.AddController(enterKeyer)
 
 	gtkutil.Async(ctx, func() func() {
-		var oldMessage string
+		inputState := inputStateKey.Acquire(ctx)
 
-		cfg := app.AcquireState(ctx, "input-state")
-		if !cfg.Get(chID.String(), &oldMessage) {
+		oldMessage, ok := inputState.Get(chID.String())
+		if !ok {
 			return nil
 		}