Basics to view threads

.gitignore

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+/venv
+__pycache__
+*.db

Makefile

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+PYTHON = python3
+FLASK = flask
+SQLITE = sqlite3
+
+default: test
+
+test::
+	test/all.sh
+
+venv:
+	$(PYTHON) -m venv $@
+
+forum.db:
+	$(SQLITE) $@ < schema.txt

db/sqlite.py

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+import sqlite3
+
+class DB:
+    def __init__(self, conn):
+        self.conn = conn
+        pass
+
+    def get_subforums(self):
+        return self._db().execute('select forum_id, name, description from subforums').fetchall()
+
+    def get_subforum(self, subforum):
+        return self._db().execute('select name, description from subforums where forum_id = ?', (subforum,)).fetchone()
+
+    def get_threads(self, subforum):
+        return self._db().execute('select thread_id, title from threads where forum_id = ?', (subforum,)).fetchall()
+
+    def get_thread(self, thread):
+        db = self._db()
+        title, text, author = db.execute('''
+            select title, text, name
+            from threads, users
+            where thread_id = ? and author_id = user_id
+            ''',
+            (thread,)
+        ).fetchone()
+        comments = db.execute('''
+            select comment_id, parent_id, name, text
+            from comments, users
+            where thread_id = ? and author_id = user_id
+            ''',
+            (thread,)
+        ).fetchall()
+        return title, text, author, comments
+
+    def get_comments(self, thread):
+        return self._db().execute('''
+            select text
+            from comments
+            where thread_id = ?
+            ''',
+            (thread,)
+        ).fetchall()
+
+    def get_comment_tree(self, comment):
+        db = self._db()
+        parent = db.execute('select text from comments where comment_id = ?', (comment,)).fetchall()
+        children = db.execute('select text from comments where parent_id = ?', (comment,)).fetchall()
+        print(parent, children)
+        return str(parent) + str(children)
+        return parent
+
+    def _db(self):
+        return sqlite3.connect(self.conn)

main.py

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+from flask import Flask, render_template
+from db.sqlite import DB
+import os
+
+app = Flask(__name__)
+db = DB(os.getenv('DB'))
+NAME = 'Agrepy'
+
+@app.route('/')
+def index():
+    return render_template('index.html', title = NAME, subforums = db.get_subforums())
+
+@app.route('/forum/<forum_id>/')
+def subforum(forum_id):
+    title, description = db.get_subforum(forum_id)
+    threads = db.get_threads(forum_id)
+    return render_template('subforum.html', title = title, description = description, threads = threads)
+
+@app.route('/thread/<thread_id>/')
+def thread(thread_id):
+    title, text, author, comments = db.get_thread(thread_id)
+    comments = create_comment_tree(comments)
+    return render_template('thread.html', title = title, text = text, author = author, comments = comments)
+
+@app.route('/comment/<comment_id>/')
+def comment(comment_id):
+    #return str(db.get_comment_tree(comment_id)[0])
+    return str(db.get_comment_tree(comment_id))
+
+
+class Comment:
+    def __init__(self, author, text):
+        self.author = author
+        self.text = text
+        self.children = []
+
+def create_comment_tree(comments):
+    root = []
+    comment_map = {}
+    for comment_id, parent_id, author, text in comments:
+        comment = Comment(author, text)
+        parent = comment_map.get(parent_id)
+        if parent is not None:
+            parent.children.append(comment)
+        else:
+            root.append(comment)
+        comment_map[comment_id] = comment
+    return root

schema.txt

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+create table users (
+	user_id    integer       unique  not null  primary key  autoincrement,
+	name       varchar(32)   unique  not null,
+	password   varchar(128)  not null,
+	email      varchar(254),
+	about      text,
+	join_date  integer,
+	role       integer       not null  default 0
+);
+
+create table threads (
+	thread_id    integer      unique  not null  primary key  autoincrement,
+	author_id    integer      not null,
+	forum_id     integer      not null,
+	create_date  integer      not null,
+	modify_date  integer      not null,
+	update_date  integer      not null,
+	title        varchar(64)  not null,
+	text         text         not null,
+	score        integer      not null  default 0,
+	dead         boolean      not null  default false
+);
+
+create table comments (
+	comment_id   integer      unique  not null  primary key  autoincrement,
+	thread_id    integer      not null,
+	author_id    integer      not null,
+	parent_id    integer,
+	create_date  integer      not null,
+	modify_date  integer      not null,
+	text         text         not null,
+	score        integer      not null  default 0,
+	dead         boolean      not null  default false
+);
+
+create table subforums (
+	forum_id            integer  unique  not null  primary key  autoincrement,
+	name                varchar(64) not null,
+	description         text,
+	allowed_roles_mask  integer  not null
+);

templates/base.html

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+<!doctype html>
+<head>
+	<title>{{ title }}</title>
+</head>
+<body>
+	<nav>
+		<a href="{{ url_for('index') }}">Home</a>
+	</nav>
+	<h1>{{ title }}</h1>
+	<main>
+		{% block content %}{% endblock %}
+	</main>
+</body>

templates/index.html

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+{% extends 'base.html' %}
+
+{% block content %}
+<ul>
+	{% for id, name, description in subforums %}
+	<li><a href="{{ url_for('subforum', forum_id = id) }}">{{ name }} - {{ description }}</a></li>
+	{% endfor %}
+</ul>
+{% endblock %}

templates/subforum.html

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+{% extends 'base.html' %}
+
+{% block content %}
+<p>{{ description }}</p>
+<ul>
+	{% for id, title in threads %}
+	<li><a href="{{ url_for('thread', thread_id = id) }}">{{ title }}</a></li>
+	{% endfor %}
+</ul>
+{% endblock %}

templates/thread.html

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+{% extends 'base.html' %}
+
+{% macro render_comment(comment) %}
+<div style="margin-left:20px">
+	<p><i>{{ comment.author }}</i></p>
+	<p>{{ comment.text }}</p>
+	{% for c in comment.children %}
+	{{ render_comment(c) }}
+	{% endfor %}
+</div>
+{% endmacro %}
+
+{% block content %}
+<p>{{ author }} - rjgoire</p>
+<p>{{ text }}</p>
+{% for c in comments %}
+{{ render_comment(c) }}
+{% endfor %}
+{% endblock %}

test/all.sh

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+#!/usr/bin/env bash
+
+SQLITE=sqlite3
+FLASK=flask
+
+set -e
+set -x
+
+tmp=$(mktemp -d)
+trap 'rm -rf $tmp' EXIT
+base=$(dirname "$0")
+
+db=$tmp/forum.db
+
+. $base/../venv/bin/activate
+
+# initialize db
+$SQLITE $db < $base/../schema.txt
+$SQLITE $db < $base/init_db.txt
+cd $base/..
+
+DB=$db $FLASK --app main --debug run

test/init_db.txt

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+insert into users (name, password, email) values ("Foo", "supasecret", "foo@bar.baz");
+insert into users (name, password, email) values ("Bar", "rgjieogir", "bar@foo.baz");
+insert into users (name, password) values ("bazzers", "reogke");
+
+insert into subforums (name, description, allowed_roles_mask)
+	values ("Earth", "The totality of all space and time; all that is, has been, and will be.", 1);
+
+insert into threads (author_id, forum_id, create_date, modify_date, update_date, title, text)
+	values (1, 1, 0, 0, 0, "Hello, world!",
+		'In its most general sense, the term "world" refers to the totality of entities, to the whole of reality or to everything that is.');
+
+insert into comments (author_id, thread_id, create_date, modify_date, text)
+	values (2, 1, 0, 0, "Hi!");
+insert into comments (author_id, thread_id, create_date, modify_date, text, parent_id)
+	values (3, 1, 0, 0, "Greetings.", 1);