lai.py

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

import argparse
import json
import re
import u1db

from datetime import datetime


DB_FILENAME = "client1.u1db"
SERVER_URL = "http://127.0.0.1:9000/server.u1db"


class Client(object):

    def __init__(self, db_filename=None, server_url=None):
        self.db_filename = db_filename or DB_FILENAME
        self.server_url = server_url or SERVER_URL

        try:
            self.db = u1db.open(self.db_filename, create=False)
        except u1db.errors.DatabaseDoesNotExist:
            self.db = u1db.open(self.db_filename, create=True)
            self.db.create_index('by-data', 'data')

    def add(self, data):
        self.db.create_doc(json.dumps({'data': data}))

    def get(self, doc_id):
        doc = self.db.get_doc(doc_id)
        content = json.loads(doc.content)
        print content['data']

    def sync(self):
        self.db.sync(self.server_url)

    def getall(self):
        for doc in self._getall():
            content = json.loads(doc.content)
            print "%s: %s" % (doc.doc_id, content['data'])

    def _getall(self):
        return self.db.get_from_index('by-data', "*")

    def find(self, regex):
        for doc in self._getall():
            content = json.loads(doc.content)
            data = content['data']
            if re.search(regex, data):
                print "%s: %s" % (doc.doc_id, data.encode('utf8'))

    def add_for_test(self, num_docs=100, text="hello world"):
        for i in range(num_docs):
            self.add("%s %s" % (text, datetime.now()))


if __name__ == '__main__':

    parser = argparse.ArgumentParser(prog='lai')
    group = parser.add_mutually_exclusive_group(required=True)

    group.add_argument('--add', '-a', metavar='doc', type=str,
                       help='Add document')
    group.add_argument('--get', '-g', metavar='id', type=str,
                       help='Get document by id')
    group.add_argument('--getall', '-x', action='store_true',
                       help='Get all documents')
    group.add_argument('--sync', '-s', action='store_true',
                       help='Sync database with server')
    group.add_argument('--find', '-f', metavar='regex', type=str,
                       help='Performs')
    group.add_argument('--add-for-test', metavar='num_docs', type=int,
                       help='Add n test docs', dest='num_docs')

    parser.add_argument('--database', metavar='filename', type=str,
                        help='Database filename', dest='db_filename')
    parser.add_argument('--server', metavar='url', type=str,
                        help='Server to sync', dest='server_url')

    args = parser.parse_args()

    client = Client(db_filename=args.db_filename,
                    server_url=args.server_url)

    if args.sync:
        client.sync()
    elif args.find:
        client.find(args.find)
    elif args.add:
        client.add(args.add)
    elif args.getall:
        client.getall()
    elif args.get:
        client.get(args.get)
    elif args.num_docs:
        client.add_for_test(args.num_docs)