forked from keeferrourke/imgrep
/
sql.go
95 lines (79 loc) · 1.79 KB
/
sql.go
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package storage
import (
"database/sql"
"errors"
"fmt"
"log"
"strings"
_ "github.com/mattn/go-sqlite3"
)
var db *sql.DB
func InitDB(path string) {
var err error
db, err = sql.Open("sqlite3", path)
if err != nil {
log.Fatal(err)
}
sqlStmt := `
create table if not exists images (
filename text not null primary key,
keywords text
);
`
_, err = db.Exec(sqlStmt)
if err != nil {
log.Printf("%q: %s\n", err, sqlStmt)
return
}
}
func Insert(filename string, keywords ...string) error {
keywordsAppended := strings.Join(keywords, ",")
stmt, err := db.Prepare("insert into images (filename, keywords) values (?, ?)")
if err != nil {
return err
}
_, err = stmt.Exec(filename, keywordsAppended)
return err
}
type Result struct {
Filename string `json:"filename"`
Keywords []string `json:"keywords"`
}
func Get(keyword string) ([]string, error) {
if keyword == "" {
return nil, errors.New("query: empty query matches all images")
}
results := []string{}
rows, err := db.Query(`select * from images`, fmt.Sprintf("%%%s%%", keyword))
if err != nil {
return nil, err
}
defer rows.Close()
for rows.Next() {
var filename string
var keywords string
err := rows.Scan(&filename, &keywords)
if err != nil {
return nil, err
}
found := false
for _, kw := range strings.Split(keywords, ",") {
if strings.Contains(strings.ToLower(kw), strings.ToLower(keyword)) {
found = true
}
}
if found {
results = append(results, filename)
}
}
return results, nil
}
func Update(filename string, keywords ...string) error {
keywordsAppended := strings.Join(keywords, ",")
stmt, err := db.Prepare("update images set keywords=? where filename=?")
if err != nil {
return err
}
_, err = stmt.Exec(keywordsAppended, filename)
return err
}