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backend_sql.py
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backend_sql.py
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import sqlite3
from path import PATH
import graphviz
from PyPDF2 import PdfFileReader
import os
import pickle
VERSION = 2.0
ARTPATH = PATH + "Article/"
ARTICLEFILE = "article.db"
CONFIGFILE = ".config"
TABLES = [
"""
CREATE TABLE IF NOT EXISTS articles (
article_id integer PRIMARY KEY autoincrement,
filename text NOT NULL,
title text NOT NULL,
author text NOT NULL,
pages integer NOT NULL,
cur_page integer DEFAULT 0,
summary text)
""",
"""
CREATE TABLE IF NOT EXISTS projects (
project_id integer PRIMARY KEY autoincrement,
name text UNIQUE NOT NULL)
""",
"""
CREATE TABLE IF NOT EXISTS articles_project (
article_project_id integer PRIMARY KEY autoincrement,
article_id integer NOT NULL,
project_id integer NOT NULL,
CONSTRAINT article_id FOREIGN KEY (article_id) REFERENCES articles(article_id),
CONSTRAINT project_id FOREIGN KEY (project_id) REFERENCES projects(project_id))
""",
"""
CREATE TABLE IF NOT EXISTS depends (
depend_id integer PRIMARY KEY autoincrement,
article_id integer NOT NULL,
child_id integer NOT NULL,
comment text,
project_id integer NOT NULL,
CONSTRAINT project_id FOREIGN KEY (project_id) REFERENCES projects(project_id))
""",
"""
CREATE TABLE IF NOT EXISTS tasks (
task_id integer PRIMARY KEY autoincrement,
comment text NOT NULL,
project_id integer NOT NULL,
CONSTRAINT project_id FOREIGN KEY (project_id) REFERENCES projects(project_id))
"""]
NODE = lambda index, title, author, ratio, main_url: f"""
N{index} [
shape=plain
label=<
<table cellborder="0" cellspacing="5">
<tr><td colspan="2">{title}</td></tr>
<tr><td colspan="2">{author}</td></tr>
<tr>
<td border="1" width="50" bgcolor="#6da8ce;{min(ratio + 0.01, 1):.2f}:white"></td>
<td color="white">{ratio * 100:.0f}%</td>
</tr>
</table>
>
URL = "{main_url}/{index}"
]
"""
class Connection:
def __init__(self):
# initialize database if not exists
for statement in TABLES:
self.execute(statement)
self.solo_images = {}
self.connected_images = {}
@staticmethod
def execute(statement):
try:
conn = sqlite3.connect(PATH + ARTICLEFILE)
cur = conn.cursor()
cur.execute(statement)
conn.commit()
conn.close()
except:
raise SyntaxError(f"Statement:\n\t{statement}\nfailed.")
# GENERAL ACTIONS
def sync(self):
files = [file for file in os.listdir(ARTPATH) if file[-4:] == ".pdf"]
db_files = [row[0] for row in self.get("articles", "filename")]
# check for files in database but not articles
[self.drop("articles", filename=file) for file in db_files if file not in files]
# check for articles not in database
for file in files:
if file in db_files:
continue
with open(ARTPATH + file, 'rb') as f:
pdf = PdfFileReader(f)
infos = pdf.getDocumentInfo()
pages = pdf.getNumPages()
if infos.title != "" and infos.title is not None:
title = infos.title
else:
title = file[:-4]
if infos.author != "" and infos.author is not None:
author = infos.author
else:
author = "Unkown author"
self.add("articles", file, title, author, pages, 0, "")
# GENERAL ACTIONS
# BASIC ACTIONS
@staticmethod
def get(table, *columns, **conditions):
conn = sqlite3.connect(PATH + ARTICLEFILE)
cur = conn.cursor()
if not conditions:
cur.execute(f"SELECT {','.join(columns)} FROM {table}")
else:
conditions = [
f"{key} = '{conditions[key]}'" if isinstance(conditions[key], str) else f"{key} = {conditions[key]}" for
key in conditions]
cur.execute(f"SELECT {','.join(columns)} FROM {table} WHERE {' AND '.join(conditions)}")
data = cur.fetchall()
conn.close()
return data
def add(self, table, *data):
data = [f"'{e}'" if isinstance(e, str) else str(e) for e in data]
self.execute(f"INSERT INTO {table} VALUES (NULL, {','.join(data)})")
def drop(self, table, **conditions):
if not conditions:
raise ValueError("No condition specified")
conditions = [
f"{key} = '{conditions[key]}'" if isinstance(conditions[key], str) else f"{key} = {conditions[key]}" for
key in conditions]
self.execute(f"DELETE FROM {table} WHERE {' AND '.join(conditions)}")
def update(self, table, column, value, **conditions):
value = f"'{value}'" if isinstance(value, str) else value
if not conditions:
raise ValueError("No condition specified")
conditions = [
f"{key} = '{conditions[key]}'" if isinstance(conditions[key], str) else f"{key} = {conditions[key]}" for
key in conditions]
self.execute(f"UPDATE {table} SET {column} = {value} WHERE {'AND'.join(conditions)}")
# BASIC ACTIONS
# PROJECT ACTIONS
@staticmethod
def get_project_articles_solo(project_name):
statement = f"""SELECT articles.article_id, title, author, pages, cur_page FROM articles
JOIN articles_project ap ON articles.article_id = ap.article_id
JOIN projects p on ap.project_id = p.project_id
WHERE (articles.article_id NOT IN (
SELECT article_id FROM depends
JOIN projects ON projects.project_id = depends.project_id
WHERE projects.name = '{project_name}')
AND articles.article_id NOT IN (
SELECT child_id FROM depends
JOIN projects ON projects.project_id = depends.project_id
WHERE projects.name = '{project_name}'))
AND p.name = '{project_name}'"""
conn = sqlite3.connect(PATH + ARTICLEFILE)
cur = conn.cursor()
cur.execute(statement)
articles = cur.fetchall()
conn.close()
return articles
@staticmethod
def get_project_articles_nonsolo(project_name):
statement = f"""SELECT article_id, title, author, pages, cur_page FROM articles
WHERE article_id IN (
SELECT article_id FROM depends
JOIN projects ON projects.project_id = depends.project_id
WHERE projects.name = '{project_name}')
OR article_id IN (
SELECT child_id FROM depends
JOIN projects ON projects.project_id = depends.project_id
WHERE projects.name = '{project_name}')
"""
conn = sqlite3.connect(PATH + ARTICLEFILE)
cur = conn.cursor()
cur.execute(statement)
articles = cur.fetchall()
conn.close()
return articles
def get_solo_graph(self, project_name, url):
if (project_name, url) in self.solo_images:
return self.solo_images[(project_name, url)]
articles = self.get_project_articles_solo(project_name)
solo_graph = graphviz.Graph()
solo_graph.graph_attr["rankdir"] = "LR"
solo_graph.graph_attr["id"] = "solo_graph"
for index, title, author, pages, curpage in articles:
solo_graph.body.append(NODE(index, title, author, curpage / pages, url))
solo_img = solo_graph.pipe(format='svg').replace(b"\r\n", b"").decode('utf-8')
# solo_img = solo_img.replace("l_", "solo_l_")
self.solo_images[(project_name, url)] = solo_img
return solo_img
def get_main_graph(self, project_name, url, dep_url):
if (project_name, url) in self.connected_images:
return self.connected_images[(project_name, url)]
articles = self.get_project_articles_nonsolo(project_name)
project_id = self.get("projects", "project_id", name=project_name)[0][0]
depends = self.get("depends", "*", project_id=project_id)
# create the nodes
graph = graphviz.Digraph()
graph.graph_attr["nodesep"] = "1"
graph.graph_attr["ranksep"] = "1"
graph.graph_attr["id"] = "main_graph"
for index, title, author, pages, curpage in articles:
graph.body.append(NODE(index, title, author, curpage / pages, url))
# add edges
for index, from_, to_, comment, project_id in depends:
graph.edge(f"N{from_}", f"N{to_}", comment, URL=f"{dep_url}/{index}", headport="n", tailport="s")
img = graph.pipe(format='svg').replace(b"\r\n", b"").decode('utf-8')
self.connected_images[(project_name, url)] = img
return img
def reset_project(self, project_name):
for key in self.solo_images:
if project_name in key:
del self.solo_images[key]
break
for key in self.connected_images:
if project_name in key:
del self.connected_images[key]
break
# PROJECT ACTIONS
BASE = Connection()
BASE.sync()
class ConfigHandler:
def __init__(self):
# check if config file already exists
if not os.path.isfile(PATH + CONFIGFILE):
with open(PATH + CONFIGFILE, "wb") as doc:
pickle.dump({"version": VERSION}, doc)
def __getitem__(self, item):
with open(PATH + CONFIGFILE, "rb") as doc:
data = pickle.load(doc)
return data.get(item)
def __call__(self, key, value):
with open(PATH + CONFIGFILE, "rb") as doc:
data = pickle.load(doc)
with open(PATH + CONFIGFILE, "wb") as doc:
data[key] = value
pickle.dump(data, doc)
CONFIG = ConfigHandler()