first commit

.gitignore

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+.ruff_cache/
+venv/
+.idea/

paste/app.py

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+"""Main app file."""
+
+from flask import Flask
+
+from paste.home import home
+
+app = Flask(__name__)
+
+
+app.register_blueprint(home)
+
+if __name__ == "__main__":
+    app.run()

paste/config.py

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+"""Manage app config from env."""
+from os import getenv
+
+REDIS_HOST = getenv("PASTE_REDIS_HOST") or "localhost"
+REDIS_PORT = getenv("PASTE_REDIS_HOST") or "6379"
+REDIS_USER = getenv("PASTE_REDIS_USER") or None
+REDIS_PASSWORD = getenv("PASTE_REDIS_PASSWORD") or None
+URL_LENGTH = getenv("PASTE_URL_LENGTH") or 4

paste/db.py

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+"""Manage db connection and insert."""
+import logging
+
+from redis import Redis
+
+from paste import config
+
+
+def connect_redis() -> Redis:
+    """
+    Connect to redis.
+    :return: Redis connection object.
+    """
+    return Redis(host=config.REDIS_HOST, port=config.REDIS_PORT)
+
+
+def check_content_exist(key: str) -> bool:
+    """
+    Verify if key already exist in redis db.
+    :param key: Key to check.
+    :return: True if existed, else false.
+    """
+    db = connect_redis()
+    return db.exists(key)
+
+
+def insert_content_db(url_id: str, expiration: int, content: str) -> None:
+    """
+
+    :param url_id: key for access to content.
+    :param expiration: Content expiration in second.
+    :param content: Paste content
+    :return: None
+    """
+    if check_content_exist(url_id):
+        db = connect_redis()
+        db.set(url_id, content)
+        db.expire(url_id, expiration)
+    else:
+        logging.error(f"Key : {url_id} already exist")

paste/home.py

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+"""Manage view and create paste."""
+from flask import Blueprint, redirect, render_template, request, url_for
+
+from paste.db import check_content_exist, connect_redis, insert_content_db
+from paste.utils import generate_id
+
+home = Blueprint("home", __name__, url_prefix="/")
+
+
+def create_paste(content: str) -> None:
+    """
+    Create paste in DB.
+    :param content: Content to add in redis.
+    :return: None.
+    """
+    url_id = generate_id()
+    while check_content_exist(url_id):
+        url_id = generate_id()
+    insert_content_db(url_id, 3600, content)
+
+
+@home.route("/")
+def homepage() -> str:
+    """
+    Homepage.
+    :return: Homepage.
+    """
+    return render_template("home.html.j2")
+
+
+@home.route("/create", methods=["POST"])
+def create() -> str:
+    """
+    Receive POST data for create paste.
+    :return: Redirection to homapage.
+    """
+    content = request.form.get("content")
+    create_paste(content)
+    return redirect(url_for("home.homepage"))
+
+
+@home.route("/<path:path>")
+def get_content(path: str) -> str:
+    """
+    Return paste for asked url.
+    :param path: Requested path.
+    :return: Paste content.
+    """
+    db = connect_redis()
+    print(db.get(path))
+    return "hello"

paste/templates/home.html.j2

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+<form id="paste-content" method="POST" accept-charset="UTF-8" action="{{ url_for('home.create') }}">
+    <input name="content">
+    <button>Create</button>
+</form>

paste/utils.py

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+"""Shared utils function."""
+import random
+import string
+
+from paste import config
+
+
+def generate_id() -> str:
+    """
+    Generate url id format.
+    :return: Url id.
+    """
+    return "".join(
+        random.choices(string.ascii_letters + string.digits, k=config.URL_LENGTH)
+    )

pyproject.toml

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+[tool.ruff]
+target-version = "py311"
+line-length = 88
+ignore = [
+    "D107", # Missing docstring in `__init__`
+    "D205", # 1 blank line required between summary line and description
+    "D401", # First line of docstring should be in imperative mood: "X"
+    "D203", # one-blank-line-before-class
+    "D212", # multi-line-summary-second-line
+    "PLR2004", # magic-value-comparison
+]
+select = [
+    "F", # Pyflakes
+    "E", # pycodestyle
+    "C90", # mccabe
+    "I", # isort
+    "N", # pep8-naming
+    "D", # pydocstyle
+    "UP", # pyupgrade
+    "ANN", # flake8-annotations
+    "S", # flake8-bandit
+    "BLE", # flake8-blind-except
+    "FBT", # flake8-boolean-trap
+    "B", # flake8-bugbear
+    "A", # flake8-builtins
+    "C4", # flake8-comprehensions
+    "EM", # flake8-errmsg
+    "ISC", # flake8-implicit-str-concat
+    "ICN", # flake8-import-conventions
+    "G", # flake8-logging-format
+    "INP", # flake8-no-pep420
+    "PIE", # flake8-pie
+    "T20", # flake8-print
+    "PYI", # flake8-pyi
+    "Q", # flake8-quotes
+    "RSE", # flake8-raise
+    "RET", # flake8-return
+    "SLOT", # flake8-slots
+    "SIM", # flake8-simplify
+    "TID", # flake8-tidy-imports
+    "TCH", # flake8-type-checking
+    "ARG", # flake8-unused-arguments
+    "PTH", # flake8-use-pathlib
+    "TD", # flake8-todos
+    "FIX", # flake8-fixme
+    "ERA", # eradicate
+    "PGH", # pygrep-hooks
+    "PL", # Pylint
+    "TRY", # tryceratops
+    "FLY", # flynt
+    "PERF", # Perflint
+    "RUF", # Ruff-specific rules
+]
+
+exclude = [
+    ".git",
+    ".ruff_cache",
+    "venv",
+    "instances",
+    "schema.sql"
+]
+format = "grouped"
+
+[tool.isort]
+profile = "black"

requirements.txt

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+flask==2.3.3
+redis==5.0.0