mouredev#46 - python

Roadmap/46 - X VS BLUESKY/python/duendeintemporal.py

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+#46 { Retos para Programadores } X VS BLUESKY 
+
+# Bibliography reference:
+# I use GPT as a reference and sometimes to correct or generate proper comments.
+
+"""
+ * EJERCICIO:
+ * La alternativa descentralizada a X, Bluesky, comienza a atraer
+ * a nuevos usuarios. ¿Cómo funciona una red de este estilo?
+ *
+ * Implementa un sistema que simule el comportamiento de estas
+ * redes sociales.
+ *
+ * Debes crear las siguientes operaciones:
+ * - Registrar un usuario por nombre e identificador único.
+ * - Un usuario puede seguir/dejar de seguir a otro.
+ * - Creación de post asociado a un usuario. Debe poseer
+ *   texto (200 caracteres máximo), fecha de creación 
+ *   e identificador único.  
+ * - Eliminación de un post.
+ * - Posibilidad de hacer like (y eliminarlo) en un post.
+ * - Visualización del feed de un usuario con sus 10 publicaciones
+ *   más actuales ordenadas desde la más reciente.
+ * - Visualización del feed de un usuario con las 10 publicaciones
+ *   más actuales de los usuarios que sigue ordenadas 
+ *   desde la más reciente.
+ *
+ * Cuando se visualiza un post, debe mostrarse:
+ * ID de usuario, nombre de usuario, texto del post,
+ * fecha de creación y número total de likes.
+ *
+ * Controla errores en duplicados o acciones no permitidas.
+
+"""
+
+log = print
+
+import uuid
+from datetime import datetime
+import time
+
+class Post:
+    def __init__(self, user, text):
+        if len(text) > 200:
+            raise ValueError("Post text cannot exceed 200 characters.")
+        self.id = str(uuid.uuid4())
+        self.user = user
+        self.text = text
+        self.created_at = datetime.now()
+        self.likes = set()
+
+    def like(self, user):
+        self.likes.add(user)
+
+    def unlike(self, user):
+        self.likes.discard(user)
+
+    def get_total_likes(self):
+        return len(self.likes)
+
+    def __str__(self):
+        return f"Post by {self.user.name}: {self.text} (Likes: {self.get_total_likes()})"
+
+class User:
+    def __init__(self, name, user_id):
+        self.name = name
+        self.id = user_id
+        self.following = set()
+        self.posts = []
+
+    def follow(self, user):
+        self.following.add(user)
+
+    def unfollow(self, user):
+        self.following.discard(user)
+
+    def create_post(self, text):
+        post = Post(self, text)
+        self.posts.append(post)
+        return post
+
+    def delete_post(self, post):
+        if post not in self.posts:
+            raise ValueError("Post not found.")
+        self.posts.remove(post)
+
+    def get_feed(self):
+        feed = sorted(self.posts, key=lambda p: p.created_at, reverse=True)[:10]
+        return feed
+
+    def get_following_feed(self):
+        feed = []
+        for user in self.following:
+            feed.extend(sorted(user.posts, key=lambda p: p.created_at, reverse=True)[:10])
+        return sorted(feed, key=lambda p: p.created_at, reverse=True)[:10]
+
+# Simulating the behavior of the JavaScript code
+def main():
+    log("Retosparaprogramadores #46.")
+
+    user1 = User("Niko Zen", 1)
+    user2 = User("Bob Marley", 2)
+    user3 = User("Psicotrogato", 3)
+
+    user1.follow(user2)
+    user1.follow(user3)
+
+    post1 = user1.create_post("I'm almost finishing this roadmap for developers.")
+    post1_1 = user1.create_post("I'm thinking in the possibility of start some of the developer course in mouredev, to get more possibilities to find a remote job.")
+    post1_2 = user1.create_post("I start to feel comfortable with Javascript and its ecosystem, right now I'm studying Next.js.")
+    post2 = user2.create_post("But Jamming!")
+    post2_1 = user2.create_post("I'm not going to wait in vain for your love!")
+    post2_2 = user2.create_post("I shot the sheriff, but I didn't shoot the deputy!")
+    post3 = user3.create_post("In a society that has abolished every kind of adventure, the only adventure that remains is abolishing the society.")
+    post3_1 = user3.create_post("My life is perfect because I accept it as it is.")
+
+    post1.like(user2)
+    post1.like(user3)
+
+    # log the feeds with meaningful output
+    log([str(post) for post in user1.get_feed()])
+    log([str(post) for post in user1.get_following_feed()])
+    log([str(post) for post in user2.get_feed()])
+    log([str(post) for post in user2.get_following_feed()])
+    log([str(post) for post in user3.get_feed()])
+    log([str(post) for post in user3.get_following_feed()])
+
+if __name__ == "__main__":
+    main()
+
+# Output:
+"""   
+Retosparaprogramadores #46.
+["Post by Niko Zen: I'm almost finishing this roadmap for developers. (Likes: 2)", "Post by Niko Zen: I'm thinking in the possibility of start some of the developer course in mouredev, to get more possibilities to find a remote job. (Likes: 0)", "Post by Niko Zen: I start to feel comfortable with Javascript and its ecosystem, right now I'm studying Next.js. (Likes: 0)"]
+["Post by Bob Marley: I'm not going to wait in vain for your love! (Likes: 0)", "Post by Bob Marley: I shot the sheriff, but I didn't shoot the deputy! (Likes: 0)", 'Post by Psicotrogato: In a society that has abolished every kind of adventure, the only adventure that remains is abolishing the society. (Likes: 0)', 'Post by Psicotrogato: My life is perfect because I accept it as it is. (Likes: 0)', 'Post by Bob Marley: But Jamming! (Likes: 0)']
+["Post by Bob Marley: I'm not going to wait in vain for your love! (Likes: 0)", "Post by Bob Marley: I shot the sheriff, but I didn't shoot the deputy! (Likes: 0)", 'Post by Bob Marley: But Jamming! (Likes: 0)']
+[]
+['Post by Psicotrogato: In a society that has abolished every kind of adventure, the only adventure that remains is abolishing the society. (Likes: 0)', 'Post by Psicotrogato: My life is perfect because I accept it as it is. (Likes: 0)']
+
+"""