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storage.go
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storage.go
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package main
import (
"database/sql"
"fmt"
"log"
"os"
"strings"
_ "github.com/mattn/go-sqlite3"
)
const DB_DRIVER string = "sqlite3"
type Storage struct {
db *sql.DB
}
func NewStorage(dbPath string, reset bool) (*Storage, error) {
if reset {
log.Println("reseting database")
os.Remove(dbPath)
}
log.Printf("opening db %s\n", dbPath)
db, err := sql.Open(DB_DRIVER, dbPath)
return &Storage{db}, err
}
func (s *Storage) Init() error {
sql_table := `
CREATE TABLE IF NOT EXISTS service (
id INTEGER primary KEY AUTOINCREMENT,
-- TODO: enforce uniqness
name TEXT, -- Github
link TEXT NOT NULL, -- https://github.com/xav-b/goto
alias TEXT NOT NULL, -- git/xav-b/goto
description TEXT, -- a simple example
tags TEXT, -- example,vcs
created_at DATETIME DEFAULT CURRENT_TIMESTAMP
);
`
log.Printf("initialising service table if not exists\n")
if _, err := s.db.Exec(sql_table); err != nil {
return err
}
sql_table = `
CREATE TABLE IF NOT EXISTS log (
id INTEGER primary KEY AUTOINCREMENT,
-- NOTE could be a foreign key
link TEXT NOT NULL,
alias TEST NOT NULL,
user TEXT,
created_at DATETIME DEFAULT CURRENT_TIMESTAMP
);
`
log.Printf("initialising slog table if not exists\n")
if _, err := s.db.Exec(sql_table); err != nil {
return err
}
log.Println("successfully initialised DB")
return nil
}
func (s *Storage) byAlias(alias string) *Service {
sqlSelect := `
SELECT link, alias
FROM service
WHERE alias = ?
`
log.Printf("fetching service (alias=%s)\n", alias)
item := &Service{}
if err := s.db.QueryRow(sqlSelect, alias).Scan(&item.Link, &item.Alias); err != nil {
// could also mean no results
log.Printf("failed to scan service row: %v\n", err)
return nil
}
return item
}
func (s *Storage) List(limit int) (results []*Service) {
// NOTE: allow to limit to prefix? Like `Jira`
sqlReadall := fmt.Sprintf(`
SELECT id, link, alias, description, tags, created_at
FROM service
ORDER BY datetime(created_at) DESC
LIMIT %d
`, limit)
log.Printf("fetching user services (limit=%d)\n", limit)
rows, _ := s.db.Query(sqlReadall)
defer rows.Close()
for rows.Next() {
var id int
var tags string
item := &Service{}
if err := rows.Scan(&id, &item.Link, &item.Alias, &item.Description, &tags, &item.CreatedAt); err != nil {
log.Fatalf("failed to scan row: %v\n", err)
}
item.Tags = strings.Split(tags, ",")
log.Printf("found new item #%d: %v\n", id, item)
results = append(results, item)
}
if err := rows.Err(); err != nil {
// TODO: should return err
log.Fatalf("failed to fetch services: %v\n", err)
}
return results
}
func (s *Storage) Delete(alias string) {
sqlStmt := `DELETE FROM service WHERE alias = ?`
if _, err := s.db.Exec(sqlStmt, alias); err != nil {
log.Fatalf("failed to delete alias %s: %v\n", alias, err)
}
}
func (s *Storage) AliasService(service *Service) error {
// TODO: handle conflicts
sqlAdd := `
INSERT INTO service (
link, alias, description, tags
) VALUES (?, ?, ?, ?)
`
stmt, _ := s.db.Prepare(sqlAdd)
defer stmt.Close()
_, err := stmt.Exec(service.Link, service.Alias, service.Description, strings.Join(service.Tags, ","))
return err
}