dark_web_forums/Forums/DB_Connection/db_connection.py

__author__ = 'DarkWeb'

import psycopg2
import traceback
import configparser


def connectDataBase():

    try:

        config = configparser.ConfigParser()
        config.read('../../setup.ini')
        ip = config.get('PostgreSQL', 'ip')
        username = config.get('PostgreSQL', 'username')
        password = config.get('PostgreSQL', 'password')
        database = config.get('PostgreSQL', 'database')

        return psycopg2.connect(host=ip, user=username, password=password, dbname=database)

    except:

        print ("Data base (darkweb_forums) not found.")
        raise SystemExit


def verifyForum(cur, nameForum):

    try:

        cur.execute("select forum_id from forums where name_forum = %(nameForum)s limit 1", {'nameForum': nameForum})

        recset = cur.fetchall()

        if recset:
            return recset[0][0]
        else:
            return 0

    except:

        trace = traceback.format_exc()
        print (trace)


def verifyBoard(cur, forum, nameBoard):

    try:

        cur.execute("select board_id from boards where forum_id = %(forum)s and name_board = %(nameBoard)s limit 1",
                    {'forum': forum, 'nameBoard': nameBoard})

        recset = cur.fetchall()

        if recset:
            return recset[0][0]
        else:
            return 0

    except:

        trace = traceback.format_exc()
        print (trace)


def verifyTopic(cur, forumId, boardId, authorId, titleTopic):

    try:

        cur.execute("select topic_id from topics where forum_id = %(forumId)s and board_id = %(boardId)s and "
                    "author_id = %(authorId)s and title_topic = %(titleTopic)s limit 1", {'forumId': forumId,
                                                                                          'boardId': boardId,
                                                                                          'authorId': authorId,
                                                                                          'titleTopic': titleTopic})

        recset = cur.fetchall()

        if recset:
            return recset[0][0]
        else:
            return 0

    except:

        trace = traceback.format_exc()
        print (trace)


def verifyUser(cur, nameUser, forumId):

    try:

        cur.execute("select user_id from users where name_user = %(nameUser)s and forum_id = %(forumId)s limit 1",
                    {'nameUser': nameUser, 'forumId': forumId})

        recset = cur.fetchall()

        if recset:
            return recset[0][0]
        else:
            return 0

    except:

        trace = traceback.format_exc()
        print (trace)


def getLastForum(cur):

    try:

        cur.execute("select forum_id from forums order by forum_id desc limit 1")

        recset = cur.fetchall()

        if recset:
            return recset[0][0]
        else:
            return 0

    except:

        trace = traceback.format_exc()
        print (trace)


def getLastBoard(cur):

    try:

        cur.execute("select board_id from boards order by board_id desc limit 1")

        recset = cur.fetchall()

        if recset:
            return recset[0][0]
        else:
            return 0

    except:

        trace = traceback.format_exc()
        print (trace)


def getLastTopic(cur):

    try:

        cur.execute("select topic_id from topics order by topic_id desc limit 1")

        recset = cur.fetchall()

        if recset:
            return recset[0][0]
        else:
            return 0

    except:

        trace = traceback.format_exc()
        print (trace)


def getLastUser(cur):

    try:

        cur.execute("select user_id from users order by user_id desc")

        recset = cur.fetchall()

        if recset:
            return recset[0][0]
        else:
            return 0

    except:

        trace = traceback.format_exc()
        print (trace)


'''
def getLastPost(cur):

    try:

        cur.execute("select id from Posts order by id desc limit 1")

        recset = cur.fetchall()

        if recset:
            return recset[0][0]
        else:
            return 0

    except:

        trace = traceback.format_exc()
        print (trace)
'''


def create_forum(cur, row, url):

    forumId = verifyForum(cur, row[0])

    if not forumId:

       forumId = int(getLastForum(cur) + 1)

       sql = "Insert into forums (forum_id, name_forum, url_forum, dateinserted_forum) Values (%s, %s, %s, %s)"

       recset = [forumId, row[0], url, row[8]]

       cur.execute(sql, recset)

    return forumId


def create_board(cur, row, forumId):

    boardId = verifyBoard(cur, forumId, row[1])

    if not boardId:

       boardId = int(getLastBoard(cur) + 1)

       sql = "Insert into boards (board_id, forum_id, name_board, dateinserted_board) Values (%s, %s, %s, %s)"

       recset = [boardId, forumId, row[1], row[8]]

       cur.execute(sql, recset)

    return boardId


def create_topic(cur, row, forumId, boardId, authorId):

    topicId = verifyTopic(cur, forumId, boardId, authorId, row[3])

    if not topicId:

       topicId = int(getLastTopic(cur) + 1)

       sql = "Insert into topics (topic_id, forum_id, board_id, author_id, title_topic, views_topic, posts_topic, " \
             "href_topic, dateadded_topic, dateinserted_topic, classification_topic) Values (%s, %s, %s, %s, %s, %s, " \
             "%s, %s, %s, %s, %s)"

       recset = [topicId, forumId, boardId, authorId,
                 row[3],
                 row[4] if row[4] != '-1' else None,
                 row[5] if row[5] != '-1' else None,
                 row[6] if row[6] != '-1' else None,
                 row[7] if row[7] != '-1' else None,
                 row[8],
                 row[17]]
       cur.execute(sql, recset)

    return topicId


def create_user(cur, row, forumId, index):

    userId = verifyUser(cur, row[9][index], forumId)

    if not userId:

       userId = int(getLastUser(cur) + 1)

       sql = "Insert into users (user_id, forum_id, name_user, status_user, reputation_user, interest_user, " \
             "signature_user, dateinserted_user) Values (%s, %s, %s, %s, %s, %s, %s, %s)"

       recset = [userId, forumId,
                 row[9][index],
                 row[10][index] if row[10][index] != '-1' else None,
                 row[11][index] if row[11][index] != '-1' else None,
                 row[12][index] if row[12][index] != '-1' else None,
                 row[13][index] if row[13][index] != '-1' else None,
                 row[8]]

       cur.execute(sql, recset)

    return userId


def create_posts(cur, row, forumId, boardId, topicId):

    if row[9] != "-1":

        for i in range(len(row[9])):

            if i != 0:
                userId = create_user(cur, row, forumId, i)
            else:
                userId = verifyUser(cur, row[2], forumId)

            sql = "Insert into posts (forum_id, board_id, topic_id, user_id, content_post, feedback_post, " \
                  "dateadded_post, dateinserted_post) Values (%s, %s, %s, %s, %s, %s, %s, %s)"

            recset = [forumId, boardId, topicId, userId,
                      row[14][i] if row[14][i] != '-1' else None,
                      row[15][i] if row[15][i] != '-1' else None,
                      row[16][i] if row[16][i] != '-1' else None,
                      row[8]]

            cur.execute(sql, recset)


def create_database(cur, con):

    try:

        sql = "create table forums (forum_id integer NOT NULL, name_forum character varying(255) NOT NULL, url_forum " \
              "character varying(255) null, dateinserted_forum timestamp(6) with time zone NOT NULL, constraint " \
              "forums_pk primary key (forum_id))"
        cur.execute(sql)

        sql = "create table boards (board_id integer NOT NULL, forum_id integer NOT NULL, name_board character " \
              "varying(255) NOT NULL, dateinserted_board timestamp(6) with time zone NOT NULL, constraint boards_pk " \
              "primary key (board_id), constraint boards_forum_id_fkey foreign key (forum_id) references forums (" \
              "forum_id))"
        cur.execute(sql)

        sql = "create table users (user_id integer NOT NULL, forum_id integer NOT NULL, name_user character varying(" \
              "255) NOT NULL, status_user character varying(255) null, reputation_user character varying(255) null, " \
              "interest_user character varying(5000) null, signature_user character varying(1000) null, " \
              "dateinserted_user timestamp(6) with time zone NOT NULL, constraint users_pk primary key (user_id), " \
              "constraint users_forum_id_fkey foreign key (forum_id) references forums (forum_id))"
        cur.execute(sql)

        sql = "create table users_history(user_id integer NOT NULL, forum_id integer NOT NULL, name_user character " \
              "varying(255) NOT NULL, status_user character varying(255) null, reputation_user character varying(255) " \
              "null, interest_user character varying(5000) null, signature_user character varying(1000) null, " \
              "dateinserted_user timestamp(6) with time zone NOT NULL, constraint users_history_pk primary key (" \
              "user_id, dateinserted_user), constraint users_history_user_id_fkey foreign key (user_id) references " \
              "users (user_id), constraint users_history_forum_id_fkey foreign key (forum_id) references forums (" \
              "forum_id))"
        cur.execute(sql)

        sql = "create table topics(topic_id integer NOT NULL, forum_id integer NOT NULL, board_id integer NOT NULL, " \
              "author_id integer NOT NULL, title_topic character varying(255) NOT NULL, views_topic integer null, " \
              "posts_topic integer null, href_topic character varying(255) null, dateadded_topic timestamp(6) with " \
              "time zone null, dateinserted_topic timestamp(6) with time zone NOT NULL, classification_topic double " \
              "precision NOT NULL, constraint topics_pk primary key (topic_id), constraint topics_author_id_fkey " \
              "foreign key (author_id) references users (user_id), constraint topics_board_id_fkey foreign key (" \
              "board_id) references boards (board_id), constraint topics_forum_id_fkey foreign key (forum_id) " \
              "references forums (forum_id))"
        cur.execute(sql)

        sql = "create table topics_history(topic_id integer NOT NULL, forum_id integer NOT NULL, board_id integer NOT " \
              "NULL, author_id integer NOT NULL, title_topic character varying(255) NOT NULL, views_topic integer " \
              "null, posts_topic integer null, href_topic character varying(255) null, dateadded_topic timestamp(6) " \
              "with time zone null, dateinserted_topic timestamp(6) with time zone NOT NULL, classification_topic " \
              "double precision NOT NULL, constraint topics_history_pk primary key (topic_id, dateinserted_topic), " \
              "constraint topics_history_topic_id_fkey foreign key (topic_id) references topics (topic_id), " \
              "constraint topics_history_author_id_fkey foreign key (author_id) references users (user_id), " \
              "constraint topics_history_board_id_fkey foreign key (board_id) references boards (board_id), " \
              "constraint topics_history_forum_id_fkey foreign key (forum_id) references forums (forum_id))"
        cur.execute(sql)

        sql = "create table posts(forum_id integer NOT NULL, board_id integer NOT NULL, topic_id integer NOT NULL, " \
              "user_id integer NOT NULL, content_post character varying(100000) null, feedback_post integer null, " \
              "dateadded_post timestamp(6) with time zone NOT NULL, dateinserted_post timestamp(6) with time zone NOT " \
              "NULL, constraint posts_pk primary key (forum_id, board_id, topic_id, user_id, dateadded_post), " \
              "constraint posts_author_id_fkey foreign key (user_id) references users (user_id), constraint " \
              "posts_board_id_fkey foreign key (board_id) references boards (board_id), constraint " \
              "posts_forum_id_fkey foreign key (forum_id) references forums (forum_id), constraint " \
              "posts_topic_id_fkey foreign key (topic_id) references topics (topic_id))"
        cur.execute(sql)

        con.commit()

    except:

        con.rollback()

        trace = traceback.format_exc()

        if (trace.find("already exists")==-1):
            print ("There was a problem during the database creation." )
            raise SystemExit