rochacbruno · rochacbruno · May 11, 2022 · May 12, 2022 · May 13, 2022 · May 16, 2022
diff --git a/.vscode/settings.json b/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+    "livePreview.defaultPreviewPath": "/exemplos/day1/pagina.html"
+}
diff --git a/exemplos/day1/blog/blog.db b/exemplos/day1/blog/blog.db
diff --git a/exemplos/day1/blog/database.py b/exemplos/day1/blog/database.py
@@ -0,0 +1,54 @@
+# 1 - conectamos ao banco de dados
+from sqlite3 import connect
+
+conn = connect("blog.db")
+cursor = conn.cursor()
+
+# 2 - Criamos a tabela caso não exista
+conn.execute(
+    """\
+    CREATE TABLE if not exists post (
+        id integer PRIMARY KEY AUTOINCREMENT,
+        title varchar UNIQUE NOT NULL,
+        content varchar NOT NULL,
+        author varchar NOT NULL
+    );
+    """
+)
+
+# 3 - Criamos os posts iniciais para alimentar o banco de dados
+posts = [
+    {
+        "title": "Python é eleita a linguagem mais popular",
+        "content": """\
+        A linguem Python foi eleita a linguagem mais popular pela revista
+        tech masters e segue dominando o mundo.
+        """,
+        "author": "Satoshi Namamoto",
+    },
+    {
+        "title": "Como criar um blog utilizando Python",
+        "content": """\
+        Neste tutorial você aprenderá como criar um blog utilizando Python.
+        <pre> import make_a_blog </pre>
+        """,
+        "author": "Guido Van Rossum",
+    },
+]
+
+
+# 4 - Inserimos os posts caso o banco de dados esteja vazio
+count = cursor.execute("SELECT * FROM post;").fetchall()
+if not count:
+    cursor.executemany(
+        """\
+        INSERT INTO post (title, content, author)
+        VALUES (:title, :content, :author);
+        """,
+        posts,
+    )
+    conn.commit()
+
+# 5 - Verificamos que foi realmente inserido
+posts = cursor.execute("SELECT * FROM post;").fetchall()
+assert len(posts) >= 2
diff --git a/exemplos/day1/blog/form.template.html b/exemplos/day1/blog/form.template.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Blog</title>
+</head>
+<body>
+    <h1>New Post</h1>
+    <form action="/new" method="post">
+        <label for="title">Title:</label><br>
+        <input type="text" name="title" /><br>
+        <label for="content">Content:</label><br>
+        <textarea name="content" cols="30" rows="5"></textarea><br>
+        <label for="author">Author:</label><br>
+        <input type="text" name="author" /><br>
+        <input type="submit" value="Enviar">
+    </form>
+</body>
+</html>
diff --git a/exemplos/day1/blog/list.template.html b/exemplos/day1/blog/list.template.html
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Blog</title>
+</head>
+<body>
+    <h1>Blog Posts:</h1>
+    <ul>
+    {post_list}
+    </ul>
+</body>
+</html>
diff --git a/exemplos/day1/blog/post.template.html b/exemplos/day1/blog/post.template.html
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Blog</title>
+</head>
+<body>
+    <h1>{post[title]}</h1>
+    <hr />
+    <p>
+    {post[content]}
+    </p>
+    <hr />
+    <small>{post[author]}</small>
+</body>
+</html>
diff --git a/exemplos/day1/blog/render.py b/exemplos/day1/blog/render.py
@@ -0,0 +1,38 @@
+from pathlib import Path
+from database import conn
+
+# 1 - Obtemos os posts do banco de dados e deserializamos em um dict
+cursor = conn.cursor()
+fields = ("id", "title", "content", "author")
+results = cursor.execute("SELECT * FROM post;")
+posts = [dict(zip(fields, post)) for post in results]
+
+# 2 - Criamos a pasta de destino do site
+site_dir = Path("site")
+site_dir.mkdir(exist_ok=True)
+
+# 3 - Criamos uma função capaz de gerar a url de um post
+def get_post_url(post):
+    slug = post["title"].lower().replace(" ", "-")
+    return f"{slug}.html"
+
+
+# 3 - Renderizamos o a página `index.html` a partir do template.
+index_template = Path("list.template.html").read_text()
+index_page = site_dir / Path("index.html")
+post_list = [
+    f"<li><a href='{get_post_url(post)}'>{post['title']}</a></li>"
+    for post in posts
+]
+index_page.write_text(index_template.format(post_list="\n".join(post_list)))
+
+# 4 - Renderizamos todas as páginas para cada post  partir do template.
+for post in posts:
+    post_template = Path("post.template.html").read_text()
+    post_page = site_dir / Path(get_post_url(post))
+    post_page.write_text(post_template.format(post=post))
+
+print("Site generated at", site_dir)
+
+# 5 - fechamos a conexão
+conn.close()
diff --git a/exemplos/day1/blog/site/como-criar-um-blog-utilizando-python..html b/exemplos/day1/blog/site/como-criar-um-blog-utilizando-python..html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Blog</title>
+</head>
+<body>
+    <h1>Como criar um blog utilizando Python.</h1>
+    <hr />
+    <p>
+            Neste tutorial você aprenderá como criar um blog utilizando Python.
+        <pre> import make_a_blog </pre>
+
+    </p>
+    <hr />
+    <small>Guido Van Rossum</small>
+</body>
+</html>
diff --git a/exemplos/day1/blog/site/index.html b/exemplos/day1/blog/site/index.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Blog</title>
+</head>
+<body>
+    <h1>Blog Posts:</h1>
+    <ul>
+    <li><a href='python-é-eleita-a-linguagem-mais-popular..html'>Python é eleita a linguagem mais popular.</a></li>
+<li><a href='como-criar-um-blog-utilizando-python..html'>Como criar um blog utilizando Python.</a></li>
+    </ul>
+</body>
+</html>
diff --git a/exemplos/day1/blog/site/python-é-eleita-a-linguagem-mais-popular..html b/exemplos/day1/blog/site/python-é-eleita-a-linguagem-mais-popular..html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Blog</title>
+</head>
+<body>
+    <h1>Python é eleita a linguagem mais popular.</h1>
+    <hr />
+    <p>
+            A linguem Python foi eleita a linguagem mais popular pela revista
+        tech masters e segue dominando o mundo.
+
+    </p>
+    <hr />
+    <small>Satoshi Namamoto</small>
+</body>
+</html>
diff --git a/exemplos/day1/blog/wsgi.py b/exemplos/day1/blog/wsgi.py
@@ -0,0 +1,86 @@
+import cgi
+from pathlib import Path
+from database import conn
+
+
+def add_new_post(post):
+    cursor = conn.cursor()
+    cursor.execute(
+        """\
+        INSERT INTO post (title, content, author)
+        VALUES (:title, :content, :author);
+        """,
+        post,
+    )
+    conn.commit()
+
+
+def render_template(template_name, **context):
+    template = Path(template_name).read_text()
+    return template.format(**context).encode("utf-8")
+
+
+def get_posts_from_database(post_id=None):
+    cursor = conn.cursor()
+    fields = ("id", "title", "content", "author")
+
+    if post_id:
+        results = cursor.execute("SELECT * FROM post WHERE id = ?;", post_id)
+    else:
+        results = cursor.execute("SELECT * FROM post;")
+
+    return [dict(zip(fields, post)) for post in results]
+
+
+def get_post_list(posts):
+    post_list = [
+        f"""<li><a href="/{post['id']}">{post['title']}</a></li>"""
+        for post in posts
+    ]
+    return "\n".join(post_list)
+
+
+def application(environ, start_response):
+    path = environ["PATH_INFO"]
+    method = environ["REQUEST_METHOD"]
+    body = b"Content Not Found"
+    status = "404 Not Found"
+
+    if path == "/" and method == "GET":
+        posts = get_posts_from_database()
+        body = render_template(
+            "list.template.html", post_list=get_post_list(posts)
+        )
+        status = "200 OK"
+
+    elif path.split("/")[-1].isdigit() and method == "GET":
+        post_id = path.split("/")[-1]
+        body = render_template(
+            "post.template.html",
+            post=get_posts_from_database(post_id=post_id)[0],
+        )
+        status = "200 OK"
+
+    elif path == "/new" and method == "POST":
+        form = cgi.FieldStorage(
+            fp=environ["wsgi.input"], environ=environ, keep_blank_values=1
+        )
+        post = {item.name: item.value for item in form.list}
+        add_new_post(post)
+        body = b"New post Created with Success!"
+        status = "201 Created"
+
+    elif path == "/new" and method == "GET":
+        body = render_template("form.template.html")
+        status = "200 OK"
+
+    headers = [("Content-type", "text/html")]
+    start_response(status, headers)
+    return [body]
+
+
+if __name__ == "__main__":
+    from wsgiref.simple_server import make_server
+
+    server = make_server("0.0.0.0", 8000, application)
+    server.serve_forever()
diff --git a/exemplos/day1/blog_framework/blog.db b/exemplos/day1/blog_framework/blog.db
diff --git a/exemplos/day1/blog_framework/database.py b/exemplos/day1/blog_framework/database.py
@@ -0,0 +1,54 @@
+# 1 - conectamos ao banco de dados
+from sqlite3 import connect
+
+conn = connect("blog.db")
+cursor = conn.cursor()
+
+# 2 - Criamos a tabela caso não exista
+conn.execute(
+    """\
+    CREATE TABLE if not exists post (
+        id integer PRIMARY KEY AUTOINCREMENT,
+        title varchar UNIQUE NOT NULL,
+        content varchar NOT NULL,
+        author varchar NOT NULL
+    );
+    """
+)
+
+# 3 - Criamos os posts iniciais para alimentar o banco de dados
+posts = [
+    {
+        "title": "Python é eleita a linguagem mais popular",
+        "content": """\
+        A linguem Python foi eleita a linguagem mais popular pela revista
+        tech masters e segue dominando o mundo.
+        """,
+        "author": "Satoshi Namamoto",
+    },
+    {
+        "title": "Como criar um blog utilizando Python",
+        "content": """\
+        Neste tutorial você aprenderá como criar um blog utilizando Python.
+        <pre> import make_a_blog </pre>
+        """,
+        "author": "Guido Van Rossum",
+    },
+]
+
+
+# 4 - Inserimos os posts caso o banco de dados esteja vazio
+count = cursor.execute("SELECT * FROM post;").fetchall()
+if not count:
+    cursor.executemany(
+        """\
+        INSERT INTO post (title, content, author)
+        VALUES (:title, :content, :author);
+        """,
+        posts,
+    )
+    conn.commit()
+
+# 5 - Verificamos que foi realmente inserido
+posts = cursor.execute("SELECT * FROM post;").fetchall()
+assert len(posts) >= 2