WIP options pages

src/OptionsPages.php

@@ -0,0 +1,133 @@
+<?php
+
+namespace WPGraphQL\Extensions\Polylang;
+
+class OptionsPages
+{
+    static $language_root_queries = [];
+    static $current_language = null;
+
+    static function init()
+    {
+        add_action(
+            'graphql_before_resolve_field',
+            [self::class, '__action_graphql_before_resolve_field'],
+            10,
+            9
+        );
+
+        add_action(
+            'graphql_after_resolve_field',
+            [self::class, '__action_graphql_after_resolve_field'],
+            10,
+            9
+        );
+
+        add_filter(
+            'acf/validate_post_id',
+            [self::class, '__action_acf_validate_post_id'],
+            99,
+            1
+        );
+        add_filter(
+            'graphql_acf_get_root_id',
+            [self::class, '__action_graphql_acf_get_root_id'],
+            99,
+            1
+        );
+    }
+
+    static function __action_graphql_before_resolve_field(
+        $source,
+        $args,
+        $context,
+        ResolveInfo $info,
+        $field_resolver,
+        $type_name,
+        $field_key,
+        $field
+    ) {
+        if (self::is_root_query($info) && isset($args['language'])) {
+            $model = \PLL()->model;
+            $lang = $model->get_language($args['language'])->locale ?? null;
+
+            if ($lang) {
+                self::$language_root_queries[$info->path[0]] = strtolower(
+                    $lang
+                );
+            }
+        }
+
+        if (self::is_options_page($source)) {
+            $root_query = $info->path[0];
+            $lang = self::$language_root_queries[$root_query] ?? null;
+            if ($lang) {
+                error_log(
+                    "Setting lang $field_key ::" . self::$current_language
+                );
+                self::$current_language = $lang;
+            }
+        }
+    }
+
+    static function __action_graphql_after_resolve_field(
+        $source,
+        $args,
+        $context,
+        ResolveInfo $info,
+        $field_resolver,
+        $type_name,
+        $field_key,
+        $field
+    ) {
+        if (self::is_options_page($source)) {
+            self::$current_language = null;
+        }
+    }
+
+    static function __action_acf_validate_post_id($id)
+    {
+        return self::add_translation_suffix($id);
+    }
+
+    static function __action_graphql_acf_get_root_id($id)
+    {
+        return self::add_translation_suffix($id);
+    }
+
+    static function add_translation_suffix($id)
+    {
+        if (!self::$current_language) {
+            return $id;
+        }
+
+        if (self::is_already_localized($id)) {
+            return $id;
+        }
+
+        return $id . '_' . self::$current_language;
+    }
+
+    static function is_already_localized($post_id)
+    {
+        preg_match('/[a-z]{2}_[A-Z]{2}/', $post_id, $language);
+
+        return !empty($language);
+    }
+
+    static function is_options_page($source)
+    {
+        $type = $source['type'] ?? null;
+        return $type === 'options_page';
+    }
+
+    static function is_root_query(ResolveInfo $info)
+    {
+        return count($info->path) === 1;
+    }
+
+    static function get_option_page_root_queries()
+    {
+        return ['siteSettings'];
+    }
+}