Implement user password checking

internal/wisski/ingredient/php/users/users.go

@@ -0,0 +1,79 @@
+package users
+
+import (
+	_ "embed"
+	"errors"
+	"net/url"
+
+	"github.com/FAU-CDI/wisski-distillery/internal/phpx"
+	"github.com/FAU-CDI/wisski-distillery/internal/status"
+	"github.com/FAU-CDI/wisski-distillery/internal/wisski/ingredient"
+	"github.com/FAU-CDI/wisski-distillery/internal/wisski/ingredient/php"
+)
+
+type Users struct {
+	ingredient.Base
+
+	PHP *php.PHP
+}
+
+//go:embed users.php
+var usersPHP string
+
+// All returns all known usernames
+func (u *Users) All(server *phpx.Server) (users []status.User, err error) {
+	err = u.PHP.ExecScript(server, &users, usersPHP, "list_users")
+	return
+}
+
+var errLoginUnknownError = errors.New("Login: Unknown Error")
+
+// Login generates a login link for the user with the given username
+func (u *Users) Login(server *phpx.Server, username string) (dest *url.URL, err error) {
+
+	// generate a (relative) link
+	var path string
+	err = u.PHP.ExecScript(server, &path, usersPHP, "get_login_link", username)
+
+	// if something went wrong, return
+	if err != nil {
+		return nil, err
+	}
+	if path == "" {
+		return nil, errLoginUnknownError
+	}
+
+	// parse it as a url
+	dest, err = url.Parse(path)
+	if err != nil {
+		return nil, err
+	}
+
+	// and resolve the (possibly relative) reference
+	dest = u.URL().ResolveReference(dest)
+	return
+}
+
+var errSetPassword = errors.New("SetPassword: Unknown Error")
+
+// SetPassword sets the password for a given user
+func (u *Users) SetPassword(server *phpx.Server, username, password string) error {
+	var ok bool
+	err := u.PHP.ExecScript(server, &ok, usersPHP, "set_user_password", username, password)
+	if err != nil {
+		return err
+	}
+	if !ok {
+		return errSetPassword
+	}
+	return nil
+}
+
+func (u *Users) Fetch(flags ingredient.FetcherFlags, info *status.WissKI) (err error) {
+	if flags.Quick {
+		return
+	}
+
+	info.Users, _ = u.All(flags.Server)
+	return
+}