add basic demo data

demodata.sql

@@ -0,0 +1,27 @@
+INSERT INTO books(created_at, title, author, rating) VALUES ('NOW', 'O dingos, o chateaux!','Jean-Patrick Manchette', 6);
+INSERT INTO books(created_at, title, author, rating) VALUES ('NOW', 'Le petit bleu de la côte Ouest','Jean-Patrick Manchette', 7);
+INSERT INTO books(created_at, title, author, rating) VALUES ('NOW', 'D''un château l''autre','Louis-Ferdinand Céline', 10);
+INSERT INTO books(created_at, title, author, rating) VALUES ('NOW', 'Les dieux ont soif','Anatole France', 7);
+INSERT INTO books(created_at, title, author, rating) VALUES ('NOW', 'Rigodon','Louis-Ferdinand Céline', 10);
+INSERT INTO books(created_at, title, author, rating) VALUES ('NOW', 'Un barrage contre le Pacifique','Marguerite Duras', NULL);
+INSERT INTO books(created_at, title, author, rating) VALUES ('NOW', 'Salammbô','Flaubert Gustave', 8);
+INSERT INTO books(created_at, title, author, rating) VALUES ('NOW', 'Langage Machine','Romain Lucazeau', 5);
+INSERT INTO books(created_at, title, author, rating) VALUES ('NOW', 'La Ville et les chiens','Mario Vargas Llosa', 7);
+INSERT INTO books(created_at, title, author, rating) VALUES ('NOW', 'La Fille Du Capitaine','A. Pouchkine', 8);
+INSERT INTO books(created_at, title, author, rating) VALUES ('NOW', 'Aurélien','Louis Aragon', 8);
+INSERT INTO books(created_at, title, author, rating) VALUES ('NOW', 'Duo','Colette', 9);
+INSERT INTO books(created_at, title, author, rating) VALUES ('NOW', 'Gargantua','François Rabelais', 7);
+INSERT INTO books(created_at, title, author, rating) VALUES ('NOW', 'The Life of Jesus','Ernest Renan', NULL);
+INSERT INTO books(created_at, title, author, rating) VALUES ('NOW', 'L''Homme sans qualités, tome 1','Robert Musil', 7);
+INSERT INTO books(created_at, title, author, rating) VALUES ('NOW', 'The Green House','Mario Vargas Llosa', 6);
+INSERT INTO books(created_at, title, author, rating) VALUES ('NOW', 'Le coup de pistolet','Alexandre Pouchkine', 8);
+INSERT INTO books(created_at, title, author, rating) VALUES ('NOW', 'De sang-froid','Truman Capote', 6);
+INSERT INTO books(created_at, title, author, rating) VALUES ('NOW', 'La position du tireur couché','Jean-Patrick Manchette', 7);
+INSERT INTO books(created_at, title, author, rating) VALUES ('NOW', 'Vers le Phare','Virginia Woolf', 6);
+INSERT INTO books(created_at, title, author, rating) VALUES ('NOW', 'L''insoutenable légèreté de l''être', 'Milan Kundera', 8);
+INSERT INTO books(created_at, title, author, rating) VALUES ('NOW', 'Le complot contre l''Amérique','Philip Roth', 6);
+INSERT INTO books(created_at, title, author, rating) VALUES ('NOW', 'Nord','Louis-Ferdinand Céline', 10);
+INSERT INTO books(created_at, title, author, rating) VALUES ('NOW', 'Sa majesté des mouches','William Golding', 5);
+INSERT INTO books(created_at, title, author, rating) VALUES ('NOW', 'Le Pavillon d''or','Yukio Mishima', 8);
+INSERT INTO books(created_at, title, author, rating) VALUES ('NOW', 'Le meurtre d''O-tsuya','Junichiro Tanizaki', 7);
+INSERT INTO books(created_at, title, author, rating) VALUES ('NOW', 'Dojoji et autres nouvelles','Yukio Mishima', 8);

internal/db/init.go

@@ -11,7 +11,7 @@ import (
 	"git.artlef.fr/PersonalLibraryManager/internal/model"
 )
 
-func Initdb(databaseDir string) *gorm.DB {
+func Initdb(databaseDir string, demoDataPath string) *gorm.DB {
 	createDbFolderIfMissing(databaseDir)
 	db, err := gorm.Open(
 		sqlite.Open(
@@ -22,9 +22,23 @@ func Initdb(databaseDir string) *gorm.DB {
 	}
 	// Migrate the schema
 	db.AutoMigrate(&model.Book{})
+	var book model.Book
+	queryResult := db.Limit(1).Find(&book)
+	if queryResult.RowsAffected == 0 && demoDataPath != "" {
+		migrateSchema(db, demoDataPath)
+	}
 	return db
 }
 
+func migrateSchema(db *gorm.DB, demoDataPath string) {
+	log.Printf("Loading demo data file %s\n", demoDataPath)
+	data, err := os.ReadFile(demoDataPath)
+	if err != nil {
+		log.Fatal(err)
+	}
+	db.Exec(string(data))
+}
+
 func createDbFolderIfMissing(databaseDir string) {
 	_, openFileErr := os.Open(databaseDir)
 	if os.IsNotExist(openFileErr) {

main.go

@@ -20,7 +20,7 @@ func GetBookHandler(c *gin.Context, db *gorm.DB) {
 
 func main() {
 	c := config.LoadConfig("plm.toml")
-	db := db.Initdb(".")
+	db := db.Initdb(".", c.DemoDataPath)
 	r := gin.Default()
   r.Use(cors.Default()) // All origins allowed by default
 	r.GET("/books", func(c *gin.Context) {