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db.go
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db.go
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package main
import (
"database/sql"
"fmt"
)
func dbConnect() error {
db, err := sql.Open("sqlite3", "./data.sqlite")
if err != nil {
return err
}
var count int
err = db.QueryRow("SELECT COUNT(*) FROM sqlite_master WHERE type = 'table' AND name = 'articles';").Scan(&count)
if err != nil {
return err
}
if count == 0 {
fmt.Println("No articles table, creating...")
err = dbCreateTable()
if err != nil {
return err
}
}
return nil
}
func dbCreateTable() error {
stmtQuery := "CREATE TABLE IF NOT EXISTS articles (id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, title TEXT, content TEXT);"
stmt, err := db.Prepare(stmtQuery)
if err != nil {
return err
}
defer stmt.Close()
_, err = stmt.Exec()
if err != nil {
return err
}
fmt.Println("Database created successfully!")
return nil
}
func dbCreateArticle(article *Article) error {
query, err := db.Prepare("INSERT INTO articles(title, content) VALUES (?, ?)")
if err != nil {
return err
}
defer query.Close()
_, err = query.Exec(article.Title, article.Content)
if err != nil {
return err
}
return nil
}
func dbGetArticle(articleID string) (*Article, error) {
query, err := db.Prepare("SELECT id, title, content FROM articles WHERE id = ?")
if err != nil {
return nil, err
}
defer query.Close()
result := query.QueryRow(articleID)
article := new(Article)
err = result.Scan(
&article.ID,
&article.Title,
&article.Content,
)
if err != nil {
return nil, err
}
return article, nil
}
func dbGetAllArticles() ([]*Article, error) {
query, err := db.Prepare("SELECT id, title, content FROM articles")
if err != nil {
return nil, err
}
defer query.Close()
result, err := query.Query()
if err != nil {
return nil, err
}
articles := make([]*Article, 0)
for result.Next() {
data := new(Article)
err := result.Scan(
&data.ID,
&data.Title,
&data.Content,
)
if err != nil {
return nil, err
}
articles = append(articles, data)
}
return articles, nil
}
func dbUpdateArticle(article *Article) (bool, error) {
query, err := db.Prepare("UPDATE articles SET (title, content) = (?, ?) where id = ?")
if err != nil {
return false, err
}
defer query.Close()
result, err := query.Exec(&article.Title, &article.Content, &article.ID)
if err != nil {
return false, err
}
updated, err := result.RowsAffected()
if err != nil {
return false, err
}
if updated == 1 {
return true, nil
}
return false, nil
}
func dbDeleteArticle(articleID string) (bool, error) {
query, err := db.Prepare("DELETE FROM articles WHERE id = ?")
if err != nil {
return false, err
}
defer query.Close()
result, err := query.Exec(articleID)
if err != nil {
return false, err
}
deleted, err := result.RowsAffected()
if err != nil {
return false, err
}
if deleted == 1 {
return true, nil
}
return false, nil
}