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| 1 | <?php |
| 2 | |
| 3 | namespace NewfoldLabs\WP\Module\SSO; |
| 4 | |
| 5 | /** |
| 6 | * Renders an optional "Login with <Host>" button on the wp-login.php screen. |
| 7 | * |
| 8 | * Brand-agnostic. The button appears only when a consumer (typically a brand |
| 9 | * plugin) populates the `newfold/sso/hosting_login` filter. The destination |
| 10 | * is the host customer portal, where the user can use the SSO magic-link |
| 11 | * flow (handled elsewhere in this module) to return to their WordPress site. |
| 12 | * |
| 13 | * Filter shape: |
| 14 | * array( |
| 15 | * 'enabled' => bool, // default false |
| 16 | * 'url' => string, // required when enabled |
| 17 | * 'label' => string, // required when enabled |
| 18 | * 'icon_svg' => string, // optional inline <svg>; use fill="currentColor" so it tints with the button text color |
| 19 | * 'new_tab' => bool, // default false |
| 20 | * 'accent_color' => string, // optional CSS color used for button background, border, and hover/focus states |
| 21 | * ) |
| 22 | * |
| 23 | * Markup lives in `includes/views/hosting-login.php`; styles in |
| 24 | * `assets/css/hosting-login.css`. |
| 25 | */ |
| 26 | class SSO_Hosting_Login { |
| 27 | |
| 28 | const FILTER = 'newfold/sso/hosting_login'; |
| 29 | const STYLE_HANDLE = 'nfd-sso-hosting-login'; |
| 30 | |
| 31 | /** |
| 32 | * Register the WordPress hooks that enqueue the stylesheet and render the |
| 33 | * button on wp-login.php. |
| 34 | */ |
| 35 | public function __construct() { |
| 36 | add_action( 'login_enqueue_scripts', array( $this, 'enqueue_styles' ) ); |
| 37 | // Late priority so our markup renders after any other login_form callbacks |
| 38 | // (e.g. external SSO providers). Combined with the high `order` value in |
| 39 | // our CSS, this anchors us at the bottom of the form regardless of what |
| 40 | // else is hooking in — without us needing to know about those plugins. |
| 41 | add_action( 'login_form', array( $this, 'render' ), PHP_INT_MAX ); |
| 42 | } |
| 43 | |
| 44 | /** |
| 45 | * Resolve the runtime config. Returns null if disabled or incomplete. |
| 46 | * |
| 47 | * @return array|null |
| 48 | */ |
| 49 | protected function get_config() { |
| 50 | $defaults = array( |
| 51 | 'enabled' => false, |
| 52 | 'url' => '', |
| 53 | 'label' => '', |
| 54 | 'icon_svg' => '', |
| 55 | 'new_tab' => false, |
| 56 | 'accent_color' => '', |
| 57 | ); |
| 58 | |
| 59 | $config = (array) apply_filters( self::FILTER, $defaults ); |
| 60 | $config = array_merge( $defaults, $config ); |
| 61 | |
| 62 | if ( empty( $config['enabled'] ) || empty( $config['url'] ) || empty( $config['label'] ) ) { |
| 63 | return null; |
| 64 | } |
| 65 | |
| 66 | return $config; |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * Enqueue the button stylesheet on wp-login.php. Skipped when the filter |
| 71 | * is unset or the resolved config is incomplete. |
| 72 | */ |
| 73 | public function enqueue_styles() { |
| 74 | if ( null === $this->get_config() ) { |
| 75 | return; |
| 76 | } |
| 77 | |
| 78 | wp_enqueue_style( |
| 79 | self::STYLE_HANDLE, |
| 80 | NFD_SSO_URL . '/assets/css/hosting-login.css', |
| 81 | array( 'login' ), |
| 82 | defined( 'NFD_SSO_VERSION' ) ? NFD_SSO_VERSION : false |
| 83 | ); |
| 84 | } |
| 85 | |
| 86 | /** |
| 87 | * Render the button markup. No-op when the filter is unset or the resolved |
| 88 | * config is missing required fields. |
| 89 | */ |
| 90 | public function render() { |
| 91 | $config = $this->get_config(); |
| 92 | if ( null === $config ) { |
| 93 | return; |
| 94 | } |
| 95 | |
| 96 | $icon_html = ! empty( $config['icon_svg'] ) |
| 97 | ? sprintf( |
| 98 | '<span class="nfd-sso-hosting-login__icon" aria-hidden="true">%s</span>', |
| 99 | wp_kses( $config['icon_svg'], self::allowed_svg_tags() ) |
| 100 | ) |
| 101 | : ''; |
| 102 | |
| 103 | require NFD_SSO_DIR . '/includes/views/hosting-login.php'; |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * Allowed SVG tags/attributes for the icon. Broad enough to accommodate |
| 108 | * brand marks that use stroke, transforms, or text — defensive sanitation |
| 109 | * against scripts and unknown tags, not a strict shape contract. |
| 110 | * |
| 111 | * @return array |
| 112 | */ |
| 113 | protected static function allowed_svg_tags() { |
| 114 | return array( |
| 115 | 'svg' => array( |
| 116 | 'class' => true, |
| 117 | 'fill' => true, |
| 118 | 'height' => true, |
| 119 | 'stroke' => true, |
| 120 | 'stroke-width' => true, |
| 121 | 'viewbox' => true, |
| 122 | 'width' => true, |
| 123 | 'xmlns' => true, |
| 124 | ), |
| 125 | 'g' => array( |
| 126 | 'fill' => true, |
| 127 | 'stroke' => true, |
| 128 | 'stroke-miterlimit' => true, |
| 129 | 'stroke-width' => true, |
| 130 | 'transform' => true, |
| 131 | ), |
| 132 | 'path' => array( |
| 133 | 'd' => true, |
| 134 | 'fill' => true, |
| 135 | 'opacity' => true, |
| 136 | 'stroke' => true, |
| 137 | 'stroke-linecap' => true, |
| 138 | 'stroke-linejoin' => true, |
| 139 | 'stroke-width' => true, |
| 140 | 'transform' => true, |
| 141 | ), |
| 142 | 'rect' => array( |
| 143 | 'fill' => true, |
| 144 | 'height' => true, |
| 145 | 'rx' => true, |
| 146 | 'transform' => true, |
| 147 | 'width' => true, |
| 148 | 'x' => true, |
| 149 | 'y' => true, |
| 150 | ), |
| 151 | 'circle' => array( |
| 152 | 'cx' => true, |
| 153 | 'cy' => true, |
| 154 | 'fill' => true, |
| 155 | 'r' => true, |
| 156 | ), |
| 157 | 'text' => array( |
| 158 | 'fill' => true, |
| 159 | 'font-family' => true, |
| 160 | 'font-size' => true, |
| 161 | 'font-weight' => true, |
| 162 | 'transform' => true, |
| 163 | 'x' => true, |
| 164 | 'y' => true, |
| 165 | ), |
| 166 | ); |
| 167 | } |
| 168 | } |