# Get new publications
# Publication and citations retrieval
# A. Kopmann, 12.4.17 (ak)
#
# Scope:
# Synchronize publication and citation database with
# the actual state of posts in wordpress.
#
# Post might be deleted, if not fitting to the
# scope of the website - mark these posts by wpid=0
# in publication database and drop all citations
#

import datetime
import requests
import json
import os.path

from ak_wordpress import wordpress_post_by_scopus, wordpress_comment_by_scopus, wordpress_get_post

# Mysql persistent data (Accout: scopus, $scopus$)
import pymysql.cursors
import pymysql

from config import *


# Summary
npubs = 0


# Check if all WP post stored in the database are still existing
# Todo:
# - Download full article description
# - Update categories for author groups in wordpress
#
def update_database():
    global npubs
    
    print "=== Check validity of publications database "
    
    # Connect to the database
    connection = pymysql.connect(host=db_host,user=db_user,password=db_pw,db=db_name,charset='utf8mb4',cursorclass=pymysql.cursors.DictCursor)
    
    # Save all publication to the publication database
    try:
        with connection.cursor() as cursor:
            
            sql = "SELECT wpid FROM `publications` WHERE wpid > 0"
            cursor.execute(sql)
            
            result = cursor.fetchall()
            
            for pub in result:
                id = int(pub['wpid'])
                
                if not wordpress_get_post(id):
                    print "Marking post %d as ununsed; deleting citations" % id
                    
                    sql = "DELETE FROM `citations` WHERE `wpid` = %s"
                    cursor.execute(sql, (id) )
                    
                    sql = "UPDATE `publications` SET `wpid` = 0 WHERE `wpid` = %s"
                    cursor.execute(sql, (id) )
                    npubs += 1


            # connection is not autocommit by default. So you must commit to save
            # your changes.
            connection.commit()

    finally:
        connection.close()





# Main

start = datetime.datetime.now()

print ""
print "***********************************************"
print "**** scopus-update-database / " + start.strftime("%Y-%m-%d") + " *****"
print "***********************************************"
print ""


# Update database
update_database()


# Display summary
end = datetime.datetime.now()
print ""
print "Summary: "
print "Date          = " + str(start)
print "NPubs removed = " + str(npubs)
print "Runtime       = " + str(end - start)
print