add projects and metrics routes

api/database/metrics.go

@@ -0,0 +1,57 @@
+package database
+
+import (
+	"database/sql"
+
+	"github.com/ngn13/website/api/util"
+)
+
+func (db *Type) MetricsGet(key string) (uint64, error) {
+	var (
+		row   *sql.Row
+		count uint64
+		err   error
+	)
+
+	if row = db.sql.QueryRow("SELECT value FROM "+TABLE_METRICS+" WHERE key = ?", key); row == nil {
+		return 0, nil
+	}
+
+	if err = row.Scan(&count); err != nil && err != sql.ErrNoRows {
+		util.Fail("failed to scan the table: %s", err.Error())
+		return 0, err
+	}
+
+	if err == sql.ErrNoRows {
+		return 0, nil
+	}
+
+	return count, nil
+}
+
+func (db *Type) MetricsSet(key string, value uint64) error {
+	var (
+		err error
+		res sql.Result
+	)
+
+	if res, err = db.sql.Exec("UPDATE "+TABLE_METRICS+" SET value = ? WHERE key = ?", value, key); err != nil && err != sql.ErrNoRows {
+		util.Fail("failed to query table: %s", err.Error())
+		return err
+	}
+
+	if effected, err := res.RowsAffected(); err != nil {
+		return err
+	} else if effected < 1 {
+		_, err = db.sql.Exec(
+			`INSERT INTO "+TABLE_METRICS+"(
+			  key, value
+		  ) values(?, ?)`,
+			key, value,
+		)
+
+		return err
+	}
+
+	return nil
+}