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main.go
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main.go
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package main
import (
"database/sql"
"encoding/json"
"fmt"
"log"
"os"
_ "github.com/mattn/go-sqlite3"
)
func main() {
if len(os.Args) < 2 {
log.Fatal(`
Usage: go-blitlink [<dbfile>] [<command>] [<args>]
Valid commands: insert, query, update, delete
If the database file does not exist, it will be created.
When no command is specified, the program will print the number of entries in the database.
insert
------
Arguments: <text> <link> <title> <shortcut>
Example: go-blitlink mydb.db insert "Hello World" "http://google.com" "Google" "g"
All fields are required, empty strings are permitted
Example: go-blitlink mydb.db insert "Hello World" "http://google.com" "" "g"
query
-----
Arguments: <text>
Example: go-blitlink mydb.db query "Hello World"
Performs a full-text search across all columns
Exact matches for the "shortcut" column are listed first
update
------
Arguments: <id> <text> <link> <title> <shortcut>
Example: go-blitlink mydb.db update 1 "Hello World" "http://github.com" "GitHub" "g"
All fields are required, empty strings are permitted
Example: go-blitlink mydb.db update 1 "Hello World" "http://github.com" "" "g"
delete
------
Arguments: <id>
Example: go-blitlink mydb.db delete 1
`)
}
db, err := sql.Open("sqlite3", os.Args[1])
if err != nil {
logErr(err)
}
defer db.Close()
setup := `
create virtual table if not exists blitlinks using fts5(text, link, title, shortcut);
`
_, err = db.Exec(setup)
if err != nil {
logErr(err)
}
if len(os.Args) < 3 {
count(db)
os.Exit(0)
}
switch os.Args[2] {
case "insert":
if len(os.Args) != 7 {
logErrf("insert requires 4 arguments")
}
insert(db, os.Args[3], os.Args[4], os.Args[5], os.Args[6])
case "query":
if len(os.Args) != 4 {
logErrf("query requires 1 argument")
}
query(db, os.Args[3])
case "update":
if len(os.Args) != 8 {
logErrf("update requires 5 arguments")
}
update(db, os.Args[3], os.Args[4], os.Args[5], os.Args[6], os.Args[7])
case "delete":
if len(os.Args) != 4 {
logErrf("delete requires 1 argument")
}
delete(db, os.Args[3])
default:
logErrf("Unknown command: %s", os.Args[2])
}
}
func count(db *sql.DB) {
countStmt := `
select count(*) from blitlinks;
`
rows, err := db.Query(countStmt)
if err != nil {
logErrf("%q: %s\n", err, countStmt)
}
defer rows.Close()
for rows.Next() {
var count int
err = rows.Scan(&count)
if err != nil {
logErr(err)
}
logMsgf(`{ "count": "%d" }`, count)
}
}
func insert(db *sql.DB, text, link, title, shortcut string) {
stmt, err := db.Prepare("insert into blitlinks(text, link, title, shortcut) values(?, ?, ?, ?)")
if err != nil {
logErr(err)
}
defer stmt.Close()
_, err = stmt.Exec(text, link, title, shortcut)
if err != nil {
logErr(err)
}
logMsgf("inserted %s %s %s %s", text, link, title, shortcut)
}
func query(db *sql.DB, text string) {
stmt, err := db.Prepare(`select rowid, text, link, title, shortcut from blitlinks where blitlinks match 'shortcut : ' || ?1 || ' OR ' || ?1 || '*' order by rank`)
if err != nil {
logErr(err)
}
rows, err := stmt.Query(text)
if err != nil {
logErr(err)
}
var results = make([][]string, 0)
for rows.Next() {
var id, text, link, title, shortcut string
err = rows.Scan(&id, &text, &link, &title, &shortcut)
if err != nil {
logErr(err)
}
results = append(results, []string{id, text, link, title, shortcut})
}
json, err := json.Marshal(results)
if err != nil {
logErr(err)
}
logMsgf("%s", json)
}
func update(db *sql.DB, id, text, link, title, shortcut string) {
stmt, err := db.Prepare("update blitlinks set text = ?, link = ?, title = ?, shortcut = ? where rowid = ?")
if err != nil {
logErr(err)
}
defer stmt.Close()
_, err = stmt.Exec(text, link, title, shortcut, id)
if err != nil {
logErr(err)
}
logMsgf("updated %s %s %s %s %s", id, text, link, title, shortcut)
}
func delete(db *sql.DB, id string) {
stmt, err := db.Prepare("delete from blitlinks where rowid = ?")
if err != nil {
logErr(err)
}
defer stmt.Close()
_, err = stmt.Exec(id)
if err != nil {
logErr(err)
}
}
func logMsgf(format string, v ...any) {
fmt.Printf(format+"\n", v...)
}
func logErr(err error) {
log.SetOutput(os.Stderr)
log.Fatal(err)
}
func logErrf(format string, v ...any) {
log.SetOutput(os.Stderr)
log.Fatalf(format, v...)
}