Add infix parameter

Author: Amine

src/Engines/TypesenseEngine.php

@@ -107,6 +107,11 @@ class TypesenseEngine extends Engine
      */
     private string $facetQuery = '';
 
+    /**
+     * @var string
+     */
+    private string $infix = 'off';
+
     /**
      * @var array
      */
@@ -242,6 +247,7 @@ private function buildSearchParams(Builder $builder, int $page, int|null $perPag
             'prioritize_exact_match'     => $this->prioritizeExactMatch,
             'enable_overrides'           => $this->enableOverrides,
             'highlight_affix_num_tokens' => $this->highlightAffixNumTokens,
+            'infix'                      => $this->infix,
         ];
 
         if ($this->limitHits > 0) {
@@ -770,6 +776,21 @@ public function setHighlightAffixNumTokens(int $highlightAffixNumTokens): static
         return $this;
     }
 
+    /**
+     * Set the infix search option for the field.
+     *
+     * @param string $infix The infix search option to enable for the field.
+     *                      Possible values: "off" (disabled, default), "always" (along with regular search),
+     *                      "fallback" (if regular search produces no results).
+     * @return $this
+     */
+    public function setInfix(string $infix): static
+    {
+        $this->infix = $infix;
+
+        return $this;
+    }
+
     /**
      * Field values under this length will be fully highlighted, instead of showing a snippet of relevant portion.
      *

src/Mixin/BuilderMixin.php

@@ -271,6 +271,21 @@ public function setHighlightAffixNumTokens(): Closure
         };
     }
 
+    /**
+     * @param string $infix
+     *
+     * @return \Closure
+     */
+    public function setInfix(): Closure
+    {
+        return function (string $infix) {
+            $this->engine()
+                ->setInfix($infix);
+
+            return $this;
+        };
+    }
+
     /**
      * @param int $snippetThreshold
      *