Added search in activity stream

app/Filter/BaseDateFilter.php

@@ -0,0 +1,103 @@
+<?php
+
+namespace Kanboard\Filter;
+
+use Kanboard\Core\DateParser;
+
+/**
+ * Base date filter class
+ *
+ * @package filter
+ * @author  Frederic Guillot
+ */
+abstract class BaseDateFilter extends BaseFilter
+{
+    /**
+     * DateParser object
+     *
+     * @access protected
+     * @var DateParser
+     */
+    protected $dateParser;
+
+    /**
+     * Set DateParser object
+     *
+     * @access public
+     * @param  DateParser $dateParser
+     * @return $this
+     */
+    public function setDateParser(DateParser $dateParser)
+    {
+        $this->dateParser = $dateParser;
+        return $this;
+    }
+
+    /**
+     * 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 '';
+    }
+
+    /**
+     * Apply a date filter
+     *
+     * @access protected
+     * @param  string $field
+     */
+    protected function applyDateFilter($field)
+    {
+        $method = $this->parseOperator();
+        $timestamp = $this->dateParser->getTimestampFromIsoFormat($this->value);
+
+        if ($method !== '') {
+            $this->query->$method($field, $this->getTimestampFromOperator($method, $timestamp));
+        } else {
+            $this->query->gte($field, $timestamp);
+            $this->query->lte($field, $timestamp + 86399);
+        }
+    }
+
+    /**
+     * Get timestamp from the operator
+     *
+     * @access public
+     * @param  string  $method
+     * @param  integer $timestamp
+     * @return integer
+     */
+    protected function getTimestampFromOperator($method, $timestamp)
+    {
+        switch ($method) {
+            case 'lte':
+                return $timestamp + 86399;
+            case 'lt':
+                return $timestamp;
+            case 'gte':
+                return $timestamp;
+            case 'gt':
+                return $timestamp + 86400;
+        }
+
+        return $timestamp;
+    }
+}