Add filter by score/complexity

app/Filter/BaseComparisonFilter.php

@@ -0,0 +1,49 @@
+<?php
+
+namespace Kanboard\Filter;
+
+/**
+ * Base comparison filter class
+ *
+ * @package filter
+ */
+abstract class BaseComparisonFilter extends BaseFilter
+{
+    /**
+     * Parse operator in the input string
+     *
+     * @access protected
+     * @return string
+     */
+    protected function parseOperator()
+    {
+        $operators = array(
+            '<=' => 'lte',
+            '>=' => 'gte',
+            '<' => 'lt',
+            '>' => 'gt',
+        );
+
+        foreach ($operators as $operator => $method) {
+            if (strpos($this->value, $operator) === 0) {
+                $this->value = substr($this->value, strlen($operator));
+                return $method;
+            }
+        }
+
+        return 'eq';
+    }
+
+    /**
+     * Apply a comparison filter
+     *
+     * @access protected
+     * @param  string $field
+     */
+    protected function applyComparisonFilter($field)
+    {
+        $method = $this->parseOperator();
+
+        $this->query->$method($field, $this->value);
+    }
+}