focus/backend/db/main.go

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package db
import (
"database/sql"
)
var db *sql.DB
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const DB_VERSION = 1
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func InitDB(driver string, connStr string) error {
var err error
db, err = sql.Open(driver, connStr)
if err != nil {
return err
}
_, err = db.Exec(`
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CREATE TABLE IF NOT EXISTS schema_version (
version INTEGER PRIMARY KEY,
timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);
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CREATE TABLE IF NOT EXISTS projects (
id INTEGER PRIMARY KEY AUTOINCREMENT,
title TEXT
);
CREATE TABLE IF NOT EXISTS cards (
id INTEGER PRIMARY KEY AUTOINCREMENT,
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project_id INTEGER,
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title TEXT,
content TEXT,
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FOREIGN KEY(project_id) REFERENCES projects(id)
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);
CREATE TABLE IF NOT EXISTS tags (
id INTEGER PRIMARY KEY AUTOINCREMENT,
project_id INTEGER,
title TEXT,
type int,
FOREIGN KEY(project_id) REFERENCES projects(id)
);
CREATE TABLE IF NOT EXISTS cardtags (
card_id INTEGER,
tag_id INTEGER,
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option_id TEXT,
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value TEXT,
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PRIMARY KEY(card_id, tag_id),
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FOREIGN KEY(card_id) REFERENCES cards(id)
FOREIGN KEY(tag_id) REFERENCES tags(id)
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FOREIGN KEY(option_id) REFERENCES tagsoptions(id)
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);
CREATE TABLE IF NOT EXISTS tagsoptions (
id INTEGER PRIMARY KEY AUTOINCREMENT,
tag_id INTEGER,
value TEXT,
FOREIGN KEY(tag_id) REFERENCES tags(id)
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);
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CREATE TABLE IF NOT EXISTS views (
id INTEGER PRIMARY KEY AUTOINCREMENT,
project_id INTEGER,
primary_tag_id INTEGER,
secondary_tag_id INTEGER,
title TEXT,
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sort_tag_id INTEGER,
sort_direction INTEGER,
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FOREIGN KEY(project_id) REFERENCES projects(id),
FOREIGN KEY(primary_tag_id) REFERENCES tags(id),
FOREIGN KEY(secondary_tag_id) REFERENCES tags(id)
);
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INSERT INTO schema_version (version)
SELECT ? WHERE NOT EXISTS (SELECT 1 FROM schema_version);
`, DB_VERSION)
if err != nil {
return err
}
return updateDB()
}
func updateDB() error {
var currentVersion int
err := db.QueryRow("SELECT MAX(version) FROM schema_version").Scan(&currentVersion)
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if err != nil {
return err
}
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if currentVersion < 2 {
_, err := db.Exec(`
ALTER TABLE views
ADD COLUMN sort_tag_id INTEGER;
ALTER TABLE views
ADD COLUMN sort_direction INTEGER;
INSERT INTO schema_version (version)
SELECT ? WHERE NOT EXISTS (SELECT 1 FROM schema_version WHERE version = ?);
`, 2, 2)
if err != nil {
return err
}
}
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return nil
}