FahdShalhoub
123 lines
2.9 KiB
Go
123 lines
2.9 KiB
Go
package services
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import (
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"context"
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"database/sql"
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"fmt"
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"log"
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"strings"
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"thamanyah/cms/v2/internal/db"
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"time"
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)
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var DB DBClient
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type Category struct {
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ID int16
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Name string
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}
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type Video struct {
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ID string
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Title string
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Description string
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CategoryIDs []int16
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Tags string
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FileName string
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StorageKey string
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MediaConvertJobID string
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Status VideoStatus
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SizeBytes int64
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CreatedAt time.Time
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UpdatedAt time.Time
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}
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type DBClient interface {
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CreateVideo(ctx context.Context, v Video) (Video, error)
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ListCategories(ctx context.Context) ([]Category, error)
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}
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type DBConcrete struct {
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SQLDB *sql.DB
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}
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func CreateConcreteDbClient(connectionString string) DBConcrete {
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sqlDB, err := sql.Open("postgres", connectionString)
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if err != nil {
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panic(fmt.Errorf("db: cannot open connection: %w", err))
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}
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return DBConcrete{
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SQLDB: sqlDB,
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}
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}
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func (svc DBConcrete) CreateVideo(ctx context.Context, v Video) (Video, error) {
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tx, err := svc.SQLDB.BeginTx(ctx, nil)
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if err != nil {
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return Video{}, err
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}
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defer tx.Rollback()
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row := tx.QueryRowContext(ctx, `
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INSERT INTO videos (title, description, tags, file_name, storage_key, mediaconvert_job_id, status, size_bytes)
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VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
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RETURNING id, created_at, updated_at
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`, v.Title, v.Description, v.Tags, v.FileName, v.StorageKey, v.MediaConvertJobID, string(v.Status), v.SizeBytes)
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if err := row.Scan(&v.ID, &v.CreatedAt, &v.UpdatedAt); err != nil {
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return Video{}, err
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}
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rows := make([]string, 0, len(v.CategoryIDs))
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for _, categoryID := range v.CategoryIDs {
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rows = append(rows, fmt.Sprintf("($1, %d)", categoryID))
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}
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if _, err := tx.ExecContext(ctx, `INSERT INTO video_categories (video_id, category_id) VALUES `+strings.Join(rows, ", "), v.ID); err != nil {
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return Video{}, fmt.Errorf("linking categories %v: %w", v.CategoryIDs, err)
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}
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if err := tx.Commit(); err != nil {
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return Video{}, err
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}
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return v, nil
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}
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func (svc DBConcrete) ListCategories(ctx context.Context) ([]Category, error) {
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rows, err := svc.SQLDB.QueryContext(ctx, `SELECT id, name FROM categories ORDER BY name`)
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if err != nil {
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return nil, err
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}
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defer rows.Close()
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var categories []Category
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for rows.Next() {
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var category Category
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if err := rows.Scan(&category.ID, &category.Name); err != nil {
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return nil, err
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}
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categories = append(categories, category)
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}
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return categories, rows.Err()
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}
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func (svc DBConcrete) Migrate() {
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if err := db.Migrate(svc.SQLDB); err != nil {
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panic(err)
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}
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}
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func (svc DBConcrete) CloseConnection() {
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err := svc.SQLDB.Close()
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if err != nil {
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log.Fatalf("Error Closing DB Connection: %s", err)
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}
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}
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func (svc DBConcrete) AssertSuccessfulConnection(ctx context.Context) {
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if err := svc.SQLDB.PingContext(ctx); err != nil {
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panic(fmt.Errorf("db: cannot connect: %w", err))
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}
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}
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