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#!/usr/bin/python3

import configparser
import mysql.connector
import os
import pyalpm
import re

config = configparser.RawConfigParser()
config.read(os.path.dirname(os.path.realpath(__file__)) + "/../conf/config")

aur_db_host = config.get('database', 'host')
aur_db_name = config.get('database', 'name')
aur_db_user = config.get('database', 'user')
aur_db_pass = config.get('database', 'password')
aur_db_socket = config.get('database', 'socket')
db_path = config.get('aurblup', 'db-path')
sync_dbs = config.get('aurblup', 'sync-dbs').split(' ')
servers = config.get('aurblup', 'servers').split(' ')


def main():
    blacklist = set()
    providers = set()
    repomap = dict()

    h = pyalpm.Handle("/", db_path)
    for sync_db in sync_dbs:
        repo = h.register_syncdb(sync_db, pyalpm.SIG_DATABASE_OPTIONAL)
        repo.servers = [server.replace("%s", sync_db) for server in servers]
        t = h.init_transaction()
        repo.update(False)
        t.release()

        for pkg in repo.pkgcache:
            blacklist.add(pkg.name)
            [blacklist.add(x) for x in pkg.replaces]
            providers.add((pkg.name, pkg.name))
            repomap[(pkg.name, pkg.name)] = repo.name
            for provision in pkg.provides:
                provisionname = re.sub(r'(<|=|>).*', '', provision)
                providers.add((pkg.name, provisionname))
                repomap[(pkg.name, provisionname)] = repo.name

    db = mysql.connector.connect(host=aur_db_host, user=aur_db_user,
                                 passwd=aur_db_pass, db=aur_db_name,
                                 unix_socket=aur_db_socket, buffered=True)
    cur = db.cursor()

    cur.execute("SELECT Name, Provides FROM OfficialProviders")
    oldproviders = set(cur.fetchall())

    for pkg, provides in providers.difference(oldproviders):
        repo = repomap[(pkg, provides)]
        cur.execute("INSERT INTO OfficialProviders (Name, Repo, Provides) "
                    "VALUES (%s, %s, %s)", [pkg, repo, provides])
    for pkg, provides in oldproviders.difference(providers):
        cur.execute("DELETE FROM OfficialProviders "
                    "WHERE Name = %s AND Provides = %s", [pkg, provides])

    db.commit()
    db.close()


if __name__ == '__main__':
    main()