# -*- coding: utf-8 -*-

# Define your item pipelines here
#
# Don't forget to add your pipeline to the ITEM_PIPELINES setting
# See: https://doc.scrapy.org/en/latest/topics/item-pipeline.html
import pymongo
from scrapy.exceptions import DropItem

class ValuePipeline(object):
    def process_item(self, item, spider):
        writen = int(item['answer_count'])+int(item['articles_count'])+int(item['pins_count'])+int(item['question_count'])
        if writen>0:
            return item
        else:
            raise DropItem("There is nothing to save")


class MongoPipeline(object):

    def __init__(self,mongo_uri,mongo_db):
        self.mongo_uri =mongo_uri
        self.mongo_db = mongo_db

    @classmethod
    def from_crawler(cls,crawler):
        return cls(
            mongo_uri=crawler.settings.get('MONGO_URI'),
            mongo_db=crawler.settings.get('MONGO_DATABASE')
        )

    def open_spider(self,spider):
        self.client = pymongo.MongoClient(self.mongo_uri)
        self.db = self.client[self.mongo_db]

    def close_spider(self,spider):
        self.client.close()

    def process_item(self,item,spider):
        self.db['user'].update({'url_token':item['url_token']},{'$set':item},True)
        return item

