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1<?php
2/**
3 * Block class.
4 *
5 * This is useful for registering custom gutenberg block to
6 * add `Login with Google` button in desired place.
7 *
8 * Particularly useful in FSE.
9 *
10 * @package RtCamp\GoogleLogin
11 * @since 1.2.3
12 */
13
14declare( strict_types=1 );
15
16namespace RtCamp\GoogleLogin\Modules;
17
18use RtCamp\GoogleLogin\Utils\Helper;
19use RtCamp\GoogleLogin\Utils\GoogleClient;
20use RtCamp\GoogleLogin\Interfaces\Module;
21use function RtCamp\GoogleLogin\plugin;
22
23/**
24 * Class Block.
25 *
26 * @package RtCamp\GoogleLogin\Modules
27 */
28class Block implements Module {
29
30    /**
31     * Script handle.
32     *
33     * @var string
34     */
35    const SCRIPT_HANDLE = 'google-login-block';
36
37    /**
38     * Assets object.
39     *
40     * @var Assets
41     */
42    public $assets;
43
44    /**
45     * Google client.
46     *
47     * @var GoogleClient
48     */
49    public $client;
50
51    /**
52     * Module name.
53     *
54     * @return string
55     */
56    public function name(): string {
57        return 'google_login_block';
58    }
59
60    /**
61     * Block constructor.
62     *
63     * @param Assets       $assets Assets object.
64     * @param GoogleClient $client Google client object.
65     */
66    public function __construct( Assets $assets, GoogleClient $client ) {
67        $this->assets = $assets;
68        $this->client = $client;
69    }
70
71    /**
72     * Initialization.
73     *
74     * @return void
75     */
76    public function init(): void {
77        add_action(
78            'wp_enqueue_scripts',
79            [ $this->assets, 'register_login_styles' ]
80        );
81
82        add_action(
83            'enqueue_block_editor_assets',
84            [ $this, 'enqueue_block_editor_assets' ]
85        );
86
87        add_action( 'init', [ $this, 'register' ] );
88    }
89
90    /**
91     * Enqueue block editor assets.
92     *
93     * @return void
94     */
95    public function enqueue_block_editor_assets() {
96        $this->assets->register_login_styles();
97        $this->assets->register_script(
98            self::SCRIPT_HANDLE,
99            'build/js/block-button.js',
100            [
101                'wp-blocks',
102                'wp-element',
103                'wp-editor',
104                'wp-components',
105            ],
106            filemtime( trailingslashit( plugin()->assets_dir ) . 'build/js/block-button.js' ),
107            false
108        );
109
110        wp_enqueue_script( self::SCRIPT_HANDLE );
111    }
112
113    /**
114     * Register the block.
115     *
116     * @return void
117     */
118    public function register(): void {
119        register_block_type(
120            'google-login/login-button',
121            [
122                'editor_style'    => $this->assets::LOGIN_BUTTON_STYLE_HANDLE,
123                'style'           => $this->assets::LOGIN_BUTTON_STYLE_HANDLE,
124                'render_callback' => [ $this, 'render_login_button' ],
125                'attributes'      => [
126                    'buttonText'   => [
127                        'type' => 'string',
128                    ],
129                    'forceDisplay' => [
130                        'type'    => 'boolean',
131                        'default' => false,
132                    ],
133                ],
134            ]
135        );
136    }
137
138    /**
139     * Render callback for block.
140     *
141     * This will output the Login with Google
142     * button if user is not logged in currently.
143     *
144     * @param string $attributes Block attributes.
145     *
146     * @return string
147     */
148    public function render_login_button( $attributes ): string {
149        /**
150         * This filter is useful where we want to forcefully display login button,
151         * even when user is already logged-in in system.
152         *
153         * @param bool $display flag to display button. Default false.
154         *
155         * @since 1.2.3
156         */
157        $force_display = $attributes['forceDisplay'] ?? false;
158        if (  $force_display || ! is_user_logged_in() || apply_filters( 'rtcamp.google_login_button_display', false ) ) {
159            $markup = $this->markup(
160                [
161                    'login_url'           => $this->client->authorization_url(),
162                    'custom_btn_text'     => $attributes['buttonText'] ?? false,
163                    'force_display_block' => $attributes['forceDisplay'] ?? false,
164                ]
165            );
166
167            ob_start();
168            ?>
169            <div class="wp_google_login">
170                <?php echo wp_kses_post( $markup ); ?>
171            </div>
172            <?php
173
174            return ob_get_clean();
175        }
176
177        return '';
178    }
179
180    /**
181     * Return markup for login button.
182     *
183     * @param array $args Arguments passed to template.
184     *
185     * @return string
186     */
187    private function markup( array $args = [] ): string {
188        $args = wp_parse_args(
189            $args,
190            [
191                'login_url'       => '#',
192                'custom_btn_text' => '',
193                'forceDisplay'    => false,
194            ]
195        );
196
197        $template = trailingslashit( plugin()->template_dir ) . 'google-login-button.php';
198        return Helper::render_template( $template, $args, false );
199    }
200}