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sqlite_db_general.go
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sqlite_db_general.go
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package buna
import (
"context"
"database/sql"
"fmt"
_ "github.com/mattn/go-sqlite3"
"go.uber.org/zap"
)
type SQLiteDB struct {
db *sql.DB
logger *zap.Logger
}
func OpenSQLiteDB(ctx context.Context, logger *zap.Logger, dsn string) (*SQLiteDB, error) {
db, err := sql.Open("sqlite3", dsn)
if err != nil {
return nil, fmt.Errorf("buna: sqlite_db_general: failed to open sqlite db: %w", err)
}
if err := db.PingContext(ctx); err != nil {
db.Close()
return nil, fmt.Errorf("buna: sqlite_db_general: sqlite db down: %w", err)
}
s := &SQLiteDB{
db: db,
logger: logger,
}
if err := s.migrate(ctx); err != nil {
s.Close()
return nil, fmt.Errorf("buna: sqlite_db_general: failed to migrate SQLite database: %w", err)
}
return s, nil
}
func (s *SQLiteDB) migrate(ctx context.Context) error {
if err := s.TransactContext(ctx, func(ctx context.Context, tx *sql.Tx) error {
if _, err := tx.ExecContext(ctx, `
CREATE TABLE IF NOT EXISTS coffees (
id INTEGER NOT NULL PRIMARY KEY,
name TEXT NOT NULL,
roaster TEXT NOT NULL,
region TEXT NULL,
variety TEXT NULL,
method TEXT NULL,
decaf BOOLEAN NULL
CHECK (decaf IN (0,1)),
UNIQUE(name, roaster)
)
`); err != nil {
return fmt.Errorf("buna: sqlite_db_general: failed to create coffees table: %w", err)
}
if _, err := tx.ExecContext(ctx, `
CREATE TABLE IF NOT EXISTS purchases (
id INTEGER NOT NULL PRIMARY KEY,
coffee_id INTEGER NOT NULL,
bought_date TEXT NOT NULL,
roast_date TEXT NULL,
FOREIGN KEY (coffee_id)
REFERENCES coffees (id)
ON DELETE RESTRICT
)
`); err != nil {
return fmt.Errorf("buna: sqlite_db_general: failed to create purchases table: %w", err)
}
if _, err := tx.ExecContext(ctx, `
CREATE TABLE IF NOT EXISTS brewing_methods (
id INTEGER NOT NULL PRIMARY KEY,
name TEXT NOT NULL,
UNIQUE(name)
)
`); err != nil {
return fmt.Errorf("buna: sqlite_db_general: failed to create brewing_methods table: %w", err)
}
if _, err := tx.ExecContext(ctx, `
CREATE TABLE IF NOT EXISTS grinders (
id INTEGER NOT NULL PRIMARY KEY,
name TEXT NOT NULL,
company TEXT NULL,
max_grind_setting INTEGER NULL,
UNIQUE(name)
)
`); err != nil {
return fmt.Errorf("buna: sqlite_db_general: failed to create grinders table: %w", err)
}
if _, err := tx.ExecContext(ctx, `
CREATE TABLE IF NOT EXISTS brewings (
id INTEGER NOT NULL PRIMARY KEY,
coffee_id INTEGER NOT NULL,
method_id INTEGER NOT NULL,
date TEXT NOT NULL,
roast_date TEXT NULL,
grinder_id INTEGER NOT NULL,
grind_setting INTEGER NOT NULL
CHECK (grind_setting >= 0),
total_brewing_time_sec INTEGER NOT NULL
CHECK (total_brewing_time_sec > 0),
water_grams REAL NOT NULL
CHECK (water_grams > 0),
coffee_grams REAL NOT NULL
CHECK (coffee_grams > 0),
v60_filter_type TEXT NULL
CHECK (v60_filter_type IN ("", "eu", "jp")),
rating INTEGER NULL
CHECK (rating >= 0 AND rating <= 10),
recommended_grind_setting_adjustment TEXT NULL
CHECK (recommended_grind_setting_adjustment IN ("", "lower", "higher")),
recommended_coffee_weight_adjustment_grams REAL NULL,
notes TEXT NULL,
FOREIGN KEY (coffee_id)
REFERENCES coffees (id)
ON DELETE RESTRICT,
FOREIGN KEY (method_id)
REFERENCES brewing_methods (id)
ON DELETE RESTRICT,
FOREIGN KEY (grinder_id)
REFERENCES grinders (id)
ON DELETE RESTRICT
)
`); err != nil {
return fmt.Errorf("buna: sqlite_db_general: failed to create brewings table: %w", err)
}
if _, err := tx.ExecContext(ctx, `
CREATE TABLE IF NOT EXISTS cuppings (
id INTEGER NOT NULL PRIMARY KEY,
date TEXT NOT NULL,
duration_min INTEGER NOT NULL
CHECK (duration_min > 0),
notes TEXT NOT NULL,
UNIQUE(date, notes)
)
`); err != nil {
return fmt.Errorf("buna: sqlite_db_general: failed to create cuppings table: %w", err)
}
if _, err := tx.ExecContext(ctx, `
CREATE TABLE IF NOT EXISTS cupped_coffees (
cupping_id INTEGER NOT NULL,
coffee_id INTEGER NOT NULL,
rank INTEGER NOT NULL
CHECK (rank > 0),
notes TEXT NOT NULL,
PRIMARY KEY (cupping_id, coffee_id),
FOREIGN KEY (cupping_id)
REFERENCES cuppings (id)
ON DELETE RESTRICT,
FOREIGN KEY (coffee_id)
REFERENCES coffees (id)
ON DELETE RESTRICT
)
`); err != nil {
return fmt.Errorf("buna: sqlite_db_general: failed to create cupped_coffees table: %w", err)
}
return nil
}); err != nil {
return fmt.Errorf("buna: sqlite_db_general: transaction failed: %w", err)
}
return nil
}
func (s *SQLiteDB) TransactContext(ctx context.Context, f func(ctx context.Context, tx *sql.Tx) error) (err error) {
tx, err := s.db.BeginTx(ctx, nil)
if err != nil {
return fmt.Errorf("buna: sqlite_db_general: failed to begin a transaction: %w", err)
}
defer func() {
if err != nil {
if err := tx.Rollback(); err != nil {
s.logger.Error("buna: sqlite_db_general: transaction rollback failed")
}
return
}
err = tx.Commit()
}()
return f(ctx, tx)
}
func (s *SQLiteDB) Close() error {
if err := s.db.Close(); err != nil {
return fmt.Errorf("buna: sqlite_db_general: failed to close sqlite db: %w", err)
}
return nil
}