<?php

class DbDocProvider implements DocProvider
{
    /**
     * @param DocTarget $target
     * @param $id
     * @return Document
     * @throws DocNotFoundException
     */
    public function getDirById(DocTarget $target, $id)
    {
        $dir = $this->getEntityById($target, $id);
        if (!$dir->isDir()) {
            throw new DocNotFoundException();
        }
        return $dir;
    }

    /**
     * @param DocTarget $target
     * @param $id
     * @return Document
     * @throws DocNotFoundException
     */
    public function getFileById(DocTarget $target, $id)
    {
        $file = $this->getEntityById($target, $id);

        if ($file->isDir()) {
            throw new DocNotFoundException();
        }

        return $file;
    }

    /**
     * @param DocTarget $target
     * @param $id
     * @return Document
     * @throws DocNotFoundException
     */
    public function getEntityById(DocTarget $target, $id)
    {
        $doc = Document::findById($target->getDocTargetId(), $target->getDocTargetType(), $id);

        if (!$doc) {
            throw new DocNotFoundException();
        }

        return $doc;
    }

    /**
     * @param DocTarget $target
     * @param $id
     * @return Document[]
     */
    public function getChildren(DocTarget $target, $id)
    {
        return Document::getChildren($target->getDocTargetId(), $target->getDocTargetType(), $id);

    }

    /**
     * @param DocTarget $target
     * @param $name
     * @param Document $parent
     * @return Document
     */
    public function createDir(DocTarget $target, $name, Document $parent = null)
    {
        $dir = new Document();
        $dir->target_id = $target->getDocTargetId();
        $dir->target_type = $target->getDocTargetType();
        $dir->parent = $parent ? $parent->id : 0;
        $dir->file = '';
        $dir->name = $name;

        $dir->save();

        return $dir;
    }

    /**
     * @param DocTarget $target
     * @param $name
     * @param $file
     * @param Document $parent
     * @return Document
     */
    public function createFile(DocTarget $target, $name, $file, Document $parent = null)
    {
        $dir = new Document();
        $dir->target_id = $target->getDocTargetId();
        $dir->target_type = $target->getDocTargetType();
        $dir->parent = $parent ? $parent->id : 0;
        $dir->file = $file;
        $dir->name = $name;
        $dir->save();

        return $dir;
    }
}