Handle priority for task and project duplication

app/Model/ProjectTaskPriorityModel.php

@@ -0,0 +1,74 @@
+<?php
+
+namespace Kanboard\Model;
+
+use Kanboard\Core\Base;
+
+/**
+ * Project Task Priority Model
+ *
+ * @package  Kanboard\Model
+ * @author   Frederic Guillot
+ */
+class ProjectTaskPriorityModel extends Base
+{
+    /**
+     * Get Priority range from a project
+     *
+     * @access public
+     * @param  array $project
+     * @return array
+     */
+    public function getPriorities(array $project)
+    {
+        $range = range($project['priority_start'], $project['priority_end']);
+        return array_combine($range, $range);
+    }
+
+    /**
+     * Get task priority settings
+     *
+     * @access public
+     * @param  int $project_id
+     * @return array|null
+     */
+    public function getPrioritySettings($project_id)
+    {
+        return $this->db
+            ->table(ProjectModel::TABLE)
+            ->columns('priority_default', 'priority_start', 'priority_end')
+            ->eq('id', $project_id)
+            ->findOne();
+    }
+
+    /**
+     * Get default task priority
+     *
+     * @access public
+     * @param  int $project_id
+     * @return int
+     */
+    public function getDefaultPriority($project_id)
+    {
+        return $this->db->table(ProjectModel::TABLE)->eq('id', $project_id)->findOneColumn('priority_default') ?: 0;
+    }
+
+    /**
+     * Get priority for a destination project
+     *
+     * @access public
+     * @param  integer $dst_project_id
+     * @param  integer $priority
+     * @return integer
+     */
+    public function getPriorityForProject($dst_project_id, $priority)
+    {
+        $settings = $this->getPrioritySettings($dst_project_id);
+
+        if ($priority >= $settings['priority_start'] && $priority <= $settings['priority_end']) {
+            return $priority;
+        }
+
+        return $settings['priority_default'];
+    }
+}