drafting persistence

components/components.go

@@ -6,11 +6,11 @@ type ID struct {
 
 type Location struct {
 	X, Y, Z int64
-	World   uint64
+	World   uint64 // this is being stored as an int in the db, overflow risk
 	Exits   []uint64
 }
 
-type LocationLink struct {
+type Exit struct {
 	To, From uint64
 }
 
@@ -23,10 +23,14 @@ type Inventory struct {
 	Items []uint64
 }
 
-type HP struct {
-	Max, Current, Regen int64
-}
+type PoolType uint64
+
+const (
+	Health = iota
+	Mana
+)
 
-type Mana struct {
+type Pool struct {
 	Max, Current, Regen int64
+	Type                PoolType
 }

db/db.go

@@ -0,0 +1,31 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.30.0
+
+package db
+
+import (
+	"context"
+	"database/sql"
+)
+
+type DBTX interface {
+	ExecContext(context.Context, string, ...interface{}) (sql.Result, error)
+	PrepareContext(context.Context, string) (*sql.Stmt, error)
+	QueryContext(context.Context, string, ...interface{}) (*sql.Rows, error)
+	QueryRowContext(context.Context, string, ...interface{}) *sql.Row
+}
+
+func New(db DBTX) *Queries {
+	return &Queries{db: db}
+}
+
+type Queries struct {
+	db DBTX
+}
+
+func (q *Queries) WithTx(tx *sql.Tx) *Queries {
+	return &Queries{
+		db: tx,
+	}
+}

db/models.go

@@ -0,0 +1,38 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.30.0
+
+package db
+
+import (
+	"database/sql"
+)
+
+type Exit struct {
+	ID   int64
+	To   sql.NullInt64
+	From sql.NullInt64
+}
+
+type Inventory struct {
+	ID int64
+}
+
+type Location struct {
+	ID    int64
+	X     int64
+	Y     int64
+	Z     int64
+	World int64
+}
+
+type Observable struct {
+	ID          int64
+	Name        string
+	Description string
+}
+
+type Pool struct {
+	ID   int64
+	Type int64
+}

db/query.sql.go

@@ -0,0 +1,82 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.30.0
+// source: query.sql
+
+package db
+
+import (
+	"context"
+	"database/sql"
+)
+
+const getLocation = `-- name: GetLocation :one
+select id, x, y, z, world from locations where id = ? LIMIT 1
+`
+
+func (q *Queries) GetLocation(ctx context.Context, id int64) (Location, error) {
+	row := q.db.QueryRowContext(ctx, getLocation, id)
+	var i Location
+	err := row.Scan(
+		&i.ID,
+		&i.X,
+		&i.Y,
+		&i.Z,
+		&i.World,
+	)
+	return i, err
+}
+
+const getLocationExitsFrom = `-- name: GetLocationExitsFrom :many
+select id, "to", "from" from exits where from = ? LIMIT 1
+`
+
+func (q *Queries) GetLocationExitsFrom(ctx context.Context, from sql.NullInt64) ([]Exit, error) {
+	rows, err := q.db.QueryContext(ctx, getLocationExitsFrom, from)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var items []Exit
+	for rows.Next() {
+		var i Exit
+		if err := rows.Scan(&i.ID, &i.To, &i.From); err != nil {
+			return nil, err
+		}
+		items = append(items, i)
+	}
+	if err := rows.Close(); err != nil {
+		return nil, err
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	return items, nil
+}
+
+const getLocationExitsTo = `-- name: GetLocationExitsTo :many
+select id, "to", "from" from exits where to = ? LIMIT 1
+`
+
+func (q *Queries) GetLocationExitsTo(ctx context.Context, to sql.NullInt64) ([]Exit, error) {
+	rows, err := q.db.QueryContext(ctx, getLocationExitsTo, to)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var items []Exit
+	for rows.Next() {
+		var i Exit
+		if err := rows.Scan(&i.ID, &i.To, &i.From); err != nil {
+			return nil, err
+		}
+		items = append(items, i)
+	}
+	if err := rows.Close(); err != nil {
+		return nil, err
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	return items, nil
+}

query.sql

@@ -0,0 +1,8 @@
+-- name: GetLocation :one
+select * from locations where id = ? LIMIT 1;
+
+-- name: GetLocationExitsTo :many
+select * from exits where to = ? LIMIT 1;
+
+-- name: GetLocationExitsFrom :many
+select * from exits where from = ? LIMIT 1;

schema.sql

@@ -0,0 +1,28 @@
+create TABLE locations (
+  id INTEGER PRIMARY KEY,
+  x INTEGER NOT NULL,
+  y INTEGER NOT NULL,
+  z INTEGER NOT NULL,
+  world INTEGER NOT NULL
+)
+
+create TABLE exits (
+  id INTEGER PRIMARY KEY,
+  to INTEGER REFERENCES locations(id),
+  from INTEGER REFERENCES locations(id)
+)
+
+create TABLE observables (
+  id INTEGER PRIMARY KEY,
+  name TEXT NOT NULL,
+  description TEXT NOT NULL
+)
+
+create TABLE inventories (
+  id INTEGER PRIMARY KEY
+)
+
+create TABLE pools (
+  id INTEGER PRIMARY KEY,
+  type INTEGER NOT NULL
+)

sqlc.yaml

@@ -0,0 +1,9 @@
+version: "2"
+sql:
+  - engine: "sqlite"
+    queries: "query.sql"
+    schema: "schema.sql"
+    gen:
+      go:
+        package: "db"
+        out: "db"