Added Text filter (#7)

* Added Text filter

* Updated docs

* Added missing word

Author: vladvildanov

src/Query/Filter/AbstractFilter.php

@@ -20,7 +20,7 @@ abstract class AbstractFilter implements FilterInterface
     /**
      * @inheritDoc
      */
-    public function __construct(string $fieldName, Condition $condition, mixed $value)
+    public function __construct(protected string $fieldName, protected Condition $condition, protected mixed $value)
     {
     }
 

src/Query/Filter/NumericFilter.php

@@ -12,9 +12,9 @@ class NumericFilter extends AbstractFilter
      * Value can be provided as integer (single value) and in case of between condition as array of two integers.
      */
     public function __construct(
-        private readonly string $fieldName,
-        private readonly Condition $condition,
-        private readonly mixed $value
+        protected string $fieldName,
+        protected Condition $condition,
+        protected mixed $value
     ) {
         parent::__construct($fieldName, $condition, $value);
     }

src/Query/Filter/TagFilter.php

@@ -17,12 +17,12 @@ class TagFilter extends AbstractFilter
      * @param string|array $value
      */
     public function __construct(
-        private readonly string    $fieldName,
-        private readonly Condition $condition,
+        protected string    $fieldName,
+        protected Condition $condition,
         #[ArrayShape([
             'conjunction' => Logical::class,
             'tags' => 'array',
-        ])] private $value
+        ])] protected mixed $value
     ) {
         parent::__construct($this->fieldName, $this->condition, $this->value);
     }

src/Query/Filter/TextFilter.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace Vladvildanov\PredisVl\Query\Filter;
+
+use Vladvildanov\PredisVl\Enum\Condition;
+
+class TextFilter extends AbstractFilter
+{
+    /**
+     * Creates text filter based on condition.
+     * Value should be provided as a string, it's possible to provide multiple values with separator
+     * to modify the behaviour.
+     *
+     * Example: "foo|bar" - matching values that contains foo OR bar
+     * "foo bar" - matching values that contains foo AND bar
+     * "%foobaz%" - fuzzy search
+     *
+     * Condition can be set to "pattern" to perform:index, suffix or infix search.
+     *
+     * @param string $fieldName
+     * @param Condition $condition
+     * @param string $value
+     */
+    public function __construct(string $fieldName, Condition $condition, $value)
+    {
+        parent::__construct($fieldName, $condition, $value);
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function toExpression(): string
+    {
+        if (empty($this->value)) {
+            return '*';
+        }
+
+        if ($this->condition === Condition::equal || $this->condition === Condition::notEqual) {
+            $condition = $this->conditionMappings[$this->condition->value];
+
+            return "$condition@$this->fieldName:($this->value)";
+        }
+
+        return "@$this->fieldName:(w'$this->value')";
+    }
+}