fix partial matching

src/Api/Controllers/SearchController.php

@@ -60,7 +60,7 @@ class SearchController extends ListDiscussionsController
             $filterQuery
                 ->add($this->sentenceMatch($search))
                 ->add($this->wordMatch($search))
-//                ->add($this->partialMatch($search))
+                ->add($this->partialMatch($search))
             ;
         }
 
@@ -240,9 +240,7 @@ class SearchController extends ListDiscussionsController
 
     protected function partialMatch(string $q)
     {
-        $wildcard = (new WildcardQuery('content', "*$q*"))
+        $wildcard = (new MatchQuery('content_partial', $q));
-            ->caseSensitivity(false)
-            ->rewrite('constant_score');
 
         return BoolQuery::create()
             // Discussion titles
@@ -256,7 +254,7 @@ class SearchController extends ListDiscussionsController
             ->add(
                 BoolQuery::create()
                     ->add(TermQuery::create('type', 'posts'), 'filter')
-                    ->add($wildcard->boost(.5)),
+                    ->add($wildcard->boost(.2)),
                 'should'
             );
     }

src/Commands/BuildCommand.php

@@ -44,6 +44,7 @@ class BuildCommand extends Command
         $properties = [
             'properties' => [
                 'content' => ['type' => 'text', 'analyzer' => 'flarum_analyzer'],
+                'content_partial' => ['type' => 'text', 'analyzer' => 'flarum_analyzer_partial', 'search_analyzer' => 'flarum_analyzer'],
                 'created_at' => ['type' => 'date'],
                 'updated_at' => ['type' => 'date'],
                 'is_private' => ['type' => 'boolean'],
@@ -67,10 +68,27 @@ class BuildCommand extends Command
                 'index' => $index,
                 'body'  => [
                     'settings' => [
+                        'index.max_ngram_diff' => 10,
                         'analysis' => [
                             'analyzer' => [
                                 'flarum_analyzer' => [
                                     'type' => $settings->get('blomstra-search.analyzer-language') ?: 'english'
+                                ],
+                                'flarum_analyzer_partial' => [
+                                    'type' => 'custom',
+                                    'tokenizer' => 'standard',
+                                    'filter' => [
+                                        'lowercase',
+                                        'partial_search_filter'
+                                    ]
+                                ]
+                            ],
+                            'filter' => [
+                                'partial_search_filter' => [
+                                    'type' => 'ngram',
+                                    'min_gram' => 1,
+                                    'max_gram' => 10,
+                                    'token_chars' => ['letter', 'digit', 'symbol']
                                 ]
                             ]
                         ]

src/Elasticsearch/MatchQuery.php

@@ -6,6 +6,7 @@ class MatchQuery extends \Spatie\ElasticsearchQueryBuilder\Queries\MatchQuery
 {
     protected string $operator = 'or';
     protected float $boost = 1;
+    protected ?string $analyzer = null;
 
     public function and()
     {
@@ -21,6 +22,13 @@ class MatchQuery extends \Spatie\ElasticsearchQueryBuilder\Queries\MatchQuery
         return $this;
     }
 
+    public function analyzer(string $analyzer)
+    {
+        $this->analyzer = $analyzer;
+
+        return $this;
+    }
+
     public function toArray(): array
     {
         $query = parent::toArray();

src/Elasticsearch/SimpleSearchQuery.php

@@ -7,6 +7,7 @@ use Spatie\ElasticsearchQueryBuilder\Queries\Query;
 class SimpleSearchQuery implements Query
 {
     protected float $boost = 1;
+    protected ?string $analyzer = null;
 
     public static function create(array $field, string $value)
     {
@@ -20,6 +21,13 @@ class SimpleSearchQuery implements Query
         return $this;
     }
 
+    public function analyzer(string $analyzer)
+    {
+        $this->analyzer = $analyzer;
+
+        return $this;
+    }
+
     public function __construct(
         protected array $fields,
         protected string $value
@@ -32,6 +40,8 @@ class SimpleSearchQuery implements Query
             'simple_query_string' => [
                 'query' => $this->value,
                 'fields' => $this->fields,
+                'analyzer' => $this->analyzer,
+                'default_operator' => 'AND',
                 'boost' => $this->boost
             ]
         ];

src/Seeders/CommentSeeder.php

@@ -61,6 +61,7 @@ class CommentSeeder extends Seeder
             'type' => $this->type(),
             'id' => $this->type() . ':' . $model->id,
             'content' => $model->content,
+            'content_partial' => $model->content,
             'created_at' => $model->created_at?->toAtomString(),
             'updated_at' => $model->edited_at?->toAtomString(),
             'is_private' => $model->is_private,

src/Seeders/DiscussionSeeder.php

@@ -61,6 +61,7 @@ class DiscussionSeeder extends Seeder
             'type' => $this->type(),
             'id' => $this->type() . ':' . $model->id,
             'content' => $model->title,
+            'content_partial' => $model->title,
             'created_at' => $model->created_at?->toAtomString(),
             'updated_at' => $model->last_posted_at?->toAtomString(),
             'is_private' => $model->is_private,