nylas-php/src/NylasModelCollection.php at 778e2f201f78986b2b414f11d0067b97dba538cb · nylas/nylas-php · GitHub

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<?php

namespace Nylas;

class NylasModelCollection {

    private $chunkSize = 50;

    public function __construct($klass, $api, $namespace=NULL, $filter=array(), $offset=0, $filters=array()) {
        $this->klass = $klass;
        $this->api = $api;
        $this->namespace = $namespace;
        $this->filter = $filter;
        $this->filters = $filters;

        if(!array_key_exists('offset', $filter)) {
            $this->filter['offset'] = 0;
        }
    }

    public function items() {
        $offset = 0;
        while (True) {
            $items = $this->_getModelCollection($offset, $this->chunkSize);
            if(!$items) {
                break;
            }
            foreach ($items as $item) {
                yield $item;
            }
            if (count($items) < $this->chunkSize) {
                break;
            }
            $offset += count($items);
        }
    }

    public function first() {
        $results = $this->_getModelCollection(0, 1);
        if ($results) {
            return $results[0];
        }
        return NULL;
    }

    public function all($limit=INF) {
        return $this->_range($this->filter['offset'], $limit);
    }

    public function where($filter, $filters=array()) {
        $this->filter = array_merge($this->filter, $filter);
        $this->filter['offset'] = 0;
        $collection = clone $this;
        $collection->filter = $this->filter;
        return $collection;
    }

    public function find($id) {
        return $this->_getModel($id);
    }

    public function create($data) {
        return $this->klass->create($data, $this);
    }

    private function _range($offset, $limit) {
        $result = array();
        while (count($result) < $limit) {
            $to_fetch = min($limit - count($result), $this->chunkSize);
            $data = $this->_getModelCollection($offset+count($result), $to_fetch);
            $result = array_merge($result, $data);

            if(!$data || count($data) < $to_fetch) {
                break;
            }
        }
        return $result;
    }

    private function _getModel($id) {
        // make filter a kwarg filters
        return $this->api->getResource($this->namespace, $this->klass, $id, $this->filter);
    }

    private function _getModelCollection($offset, $limit) {
        $this->filter['offset'] = $offset;
        $this->filter['limit'] = $limit;
        return $this->api->getResources($this->namespace, $this->klass, $this->filter);
    }

}