Add db uuid4 func and uuid insert message param

internal/db/queries_test.go

@@ -8,6 +8,7 @@ import (
 	"log/slog"
 	"reflect"
 	"testing"
+	"uuid"
 
 	"github.com/mattn/go-sqlite3"
 )
@@ -344,6 +345,53 @@ func testMessaging(t *testing.T, ctx context.Context, db *SQLite) {
 			}
 		})
 	}
+	suppliedID := uuid.NewV4()
+	for _, tt := range []struct {
+		name    string
+		id      *uuid.UUID
+		wantErr bool
+	}{
+		{name: "generated ID"},
+		{name: "supplied v4 ID", id: &suppliedID},
+		{name: "duplicate ID", id: &suppliedID, wantErr: true},
+	} {
+		t.Run(tt.name, func(t *testing.T) {
+			seq, err := qw.NextSequence(ctx, c.Id)
+			if err != nil {
+				t.Fatal(err)
+			}
+			inserted, err := qw.InsertMessage(ctx, InsertMessageParams{
+				Content:        `{"role":"assistant","content":"answer"}`,
+				ConversationId: c.Id,
+				Id:             tt.id,
+				Role:           MessageRoleAssistant,
+				Sequence:       seq,
+			})
+			if tt.wantErr {
+				if err == nil {
+					t.Fatal("duplicate ID was accepted")
+				}
+				return
+			}
+			if err != nil {
+				t.Fatal(err)
+			}
+			if _, err := uuid.Parse(inserted.Id); err != nil {
+				t.Fatal(err)
+			}
+			if tt.id != nil && inserted.Id != tt.id.String() {
+				t.Errorf("inserted ID = %s, want %s", inserted.Id, tt.id.String())
+			}
+			if tt.id == nil {
+				if err := qw.DeleteMessageId(ctx, inserted.Id); err != nil {
+					t.Fatal(err)
+				}
+			}
+		})
+	}
+	if err := qw.DeleteMessageId(ctx, suppliedID.String()); err != nil {
+		t.Fatal(err)
+	}
 	tx, err := db.Writer.BeginTx(ctx, nil)
 	if err != nil {
 		t.Fatal(err)