feat: create initial database schema

internal/db/db.go

@@ -0,0 +1,32 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.25.0
+
+package db
+
+import (
+	"context"
+
+	"github.com/jackc/pgx/v5"
+	"github.com/jackc/pgx/v5/pgconn"
+)
+
+type DBTX interface {
+	Exec(context.Context, string, ...interface{}) (pgconn.CommandTag, error)
+	Query(context.Context, string, ...interface{}) (pgx.Rows, error)
+	QueryRow(context.Context, string, ...interface{}) pgx.Row
+}
+
+func New(db DBTX) *Queries {
+	return &Queries{db: db}
+}
+
+type Queries struct {
+	db DBTX
+}
+
+func (q *Queries) WithTx(tx pgx.Tx) *Queries {
+	return &Queries{
+		db: tx,
+	}
+}

internal/db/models.go

@@ -0,0 +1,13 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.25.0
+
+package db
+
+import ()
+
+type Url struct {
+	ID      int32
+	Hash    string
+	LongUrl string
+}

internal/db/query.sql.go

@@ -0,0 +1,22 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.25.0
+// source: query.sql
+
+package db
+
+import (
+	"context"
+)
+
+const getURLByHash = `-- name: GetURLByHash :one
+SELECT id, hash, long_url FROM urls
+WHERE hash = $1
+`
+
+func (q *Queries) GetURLByHash(ctx context.Context, hash string) (Url, error) {
+	row := q.db.QueryRow(ctx, getURLByHash, hash)
+	var i Url
+	err := row.Scan(&i.ID, &i.Hash, &i.LongUrl)
+	return i, err
+}