Initial Entity stuff commit...

main.go

@@ -9,20 +9,22 @@ import (
 	_ "github.com/mattn/go-sqlite3"
 )
 
+// Panic and crash if an error shows up, and print the error
 func check(e error) {
 	if e != nil {
 		panic(e)
 	}
 }
 
+// Convert a query into an executable statement.
 func prep_query(db *sql.DB, q string) (*sql.Stmt){
 	statement, err := db.Prepare(q)
-
 	check(err)
-
 	return statement
 }
 
+// User record management stuff.  Eventually want to abstract
+// this out to store any sort of record...
 type User struct {
 	id   int64
 	name string
@@ -31,13 +33,11 @@ type User struct {
 func create_user(db *sql.DB, name string) (User) {
 	s := prep_query(db, "INSERT INTO users (name) VALUES (?)")
 	res, err := s.Exec(name)
-
 	check(err)
 
 	var u User
 
 	id, _ := res.LastInsertId()
-
 	u.id   = id
 	u.name = name
 
@@ -68,10 +68,44 @@ func get_user(db *sql.DB, name string) (User) {
 type Entity struct {
 	id         int64
 	user_id    int64
-	name       string
 	spawn_line string
 }
 
+func create_entity(db *sql.DB, user_id int64, spawn_line string) (Entity) {
+	s := prep_query(db, "INSERT INTO entities (user_id, spawn_line) VALUES (?, ?)")
+	res, err := s.Exec(user_id, spawn_line)
+	check(err)
+
+	var ent Entity
+
+	id, _         := res.LastInsertId()
+	ent.id         = id
+	ent.user_id    = user_id
+  ent.spawn_line = spawn_line
+
+	return ent
+}
+
+func get_entity(db *sql.DB, id int64) (Entity) {
+	s := prep_query(db, "SELECT * FROM entities WHERE id = ? LIMIT 1")
+	res, err := s.Query(id)
+
+	check(err)
+
+	var e Entity
+
+	res.Next()
+	res.Scan(&e.id, &e.user_id, &e.spawn_line)
+	res.Close()
+
+	if e.id != 0 {
+		return e
+	} else {
+		log.Printf("Entity id %d doesn't exist!", id)
+		panic("!")
+	}
+}
+
 func reset_database(db *sql.DB) {
 	dat, _  := os.ReadFile("setup.sql")
 	queries := strings.Split(string(dat), ";")
@@ -82,19 +116,21 @@ func reset_database(db *sql.DB) {
 	}
 }
 
-
 func main() {
 	db, _ := sql.Open("sqlite3", "rpgqui.db")
 
 	reset_database(db)
 
-	var u User
-	u = get_user(db, "Monqui")
-log.Printf("ID: %d, name: %s", u.id, u.name)
-	u = get_user(db, "dug")
-log.Printf("ID: %d, name: %s", u.id, u.name)
-	u = get_user(db, "Gary")
-log.Printf("ID: %d, name: %s", u.id, u.name)
-	u = get_user(db, "Jimbo")
-log.Printf("ID: %d, name: %s", u.id, u.name)
+	log.Println("Reset db...")
+
+// spin up a user...
+	u := get_user(db, "Monqui")
+
+// make an entity for the user...
+	e := create_entity(db, u.id, "hello im monqui")
+log.Printf("ID: %d, user_id: %d, spawn_line: %s", e.id, e.user_id, e.spawn_line)
+
+// this should fail...
+	e = create_entity(db, 2, "hello im monqui???")
+log.Printf("ID: %d, user_id: %d, spawn_line: %s", e.id, e.user_id, e.spawn_line)
 }

setup.sql

@@ -1,9 +1,11 @@
 DROP TABLE IF EXISTS users;
 DROP TABLE IF EXISTS entities;
 
+PRAGMA foreign_keys = ON;
+
 CREATE TABLE IF NOT EXISTS users (
   id   INTEGER PRIMARY KEY,
-  name VARCHAR(64)
+  name VARCHAR(64) UNIQUE
 );
 
 CREATE TABLE IF NOT EXISTS entities (