initial commit

1 files changed, 78 insertions, 0 deletions

diff --git a/db.go b/db.go
new file mode 100644
index 0000000..ddac17e
--- /dev/null
+++ b/db.go
@@ -0,0 +1,78 @@
+package main
+
+import (
+	"database/sql"
+	"errors"
+	"log"
+	"os"
+
+	_ "github.com/mattn/go-sqlite3"
+)
+
+func initDB(path string) *sql.DB {
+
+	if _, err := os.Stat(path); errors.Is(err, os.ErrNotExist) {
+		log.Printf("Creating %s...\n", path)
+		file, err := os.Create(path)
+		if err != nil {
+			log.Fatal(err)
+		}
+		file.Close()
+
+		db, _ := sql.Open("sqlite3", path)
+		initTables(db)
+		return db
+	} else {
+		db, err := sql.Open("sqlite3", path)
+		if err != nil {
+			log.Fatal(err)
+		}
+		return db
+	}
+}
+
+func initTables(db *sql.DB) {
+
+	q := `CREATE TABLE IF NOT EXISTS urls (
+		id integer NOT NULL PRIMARY KEY AUTOINCREMENT,
+		url VARCHAR(500) NOT NULL,
+		author_id VARCHAR(18),
+		guild_id VARCHAR(18),
+		channel_id VARCHAR(18),
+		status_code INTEGER
+	);
+	CREATE UNIQUE INDEX idx_urls_url ON urls(url);`
+	s, err := db.Prepare(q)
+	if err != nil {
+		log.Fatal(err)
+	}
+	s.Exec()
+}
+
+func addArchived(db *sql.DB, m *Message, status_code int) {
+
+	q := `INSERT OR IGNORE INTO urls(url, author_id, guild_id, channel_id, status_code) VALUES (?, ?, ?, ?, ?)`
+	s, err := db.Prepare(q)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer s.Close()
+	_, err = s.Exec(m.URL, m.Author, m.Guild, m.Channel, status_code)
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+
+func isCached(db *sql.DB, url string) (bool, int) {
+
+	var status_code int
+	err := db.QueryRow("SELECT status_code FROM urls WHERE url = ?",
+		url).Scan(&status_code)
+	switch {
+	case err == sql.ErrNoRows:
+		return false, status_code
+	case err != nil:
+		log.Fatal(err)
+	}
+	return true, status_code
+}