delete.go

package main

import (
	"database/sql"
	"fmt"
	"net/http"
	"strconv"
)

func initDeleteDB() {
	var err error
	deleteStmt, err = db.Prepare("DELETE FROM mails WHERE sent = 1 AND recipient_id = ?")
	if err != nil {
		LogError("Error creating delete prepared statement", err)
		panic(err)
	}
}

var deleteStmt *sql.Stmt

// Delete handles delete requests of mail.
func Delete(w http.ResponseWriter, r *http.Request, db *sql.DB) {
	// These may be empty. This is expected:
	// our authentication function will handle accordingly.
	mlid := r.Form.Get("mlid")
	passwd := r.Form.Get("passwd")

	err := checkPasswdValidity(mlid, passwd)
	if err == ErrInvalidCredentials {
		fmt.Fprintf(w, GenNormalErrorCode(240, "An authentication error occurred."))
		return
	} else if err != nil {
		fmt.Fprintf(w, GenNormalErrorCode(541, "Something weird happened."))
		LogError("Error parsing delete authentication", err)
		return
	}

	delnum := r.Form.Get("delnum")
	floatValue, err := strconv.ParseFloat(delnum, 64)
	if err != nil {
		fmt.Fprintf(w, GenNormalErrorCode(340, "Invalid delete value."))
		return
	}
	_, err = deleteStmt.Exec(mlid[1:])

	if global.Datadog {
		err = dataDogClient.Incr("mail.deleted_mail", nil, floatValue)
		if err != nil {
			LogError("Unable to update deleted_mail.", err)
		}
	}

	if err != nil {
		LogError("Error deleting from database", err)
		fmt.Fprint(w, GenNormalErrorCode(541, "Issue deleting mail from the database."))
	} else {
		fmt.Fprint(w, GenSuccessResponse(),
			"deletenum=", delnum)
	}
}