Add: initial implementation of BeautifulSoup exercise 4 with SSL, config, database, and UI setup

ejercicios/beautifulsoup/ej4/data/src/__ssl.py

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+def init_ssl():
+    import os, ssl
+    if (not os.environ.get('PYTHONHTTPSVERIFY', '') and
+    getattr(ssl, '_create_unverified_context', None)):
+        ssl._create_default_https_context = ssl._create_unverified_context

ejercicios/beautifulsoup/ej4/data/src/config.py

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+from pathlib import Path
+
+BASE_URL = "https://www.recetasgratis.net"
+RECIPES_URL = BASE_URL + "/Recetas-de-Aperitivos-tapas-listado_receta-1_1.html/"
+DATA_DIR = Path(__file__).parent.parent / "data"
+DB_PATH = DATA_DIR / "recetas.bd"

ejercicios/beautifulsoup/ej4/data/src/db.py

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+import sqlite3
+from pathlib import Path
+
+
+class DBAttr:
+    def __init__(self, name, type_, modifier=""):
+        self.name = name
+        self.type_ = type_
+        self.modifier = modifier
+
+    def sql(self):
+        parts = [self.name, self.type_]
+        if self.modifier:
+            parts.append(self.modifier)
+        return " ".join(parts)
+
+
+class DBManager:
+    _instance = None
+    
+    def __new__(cls, *args, **kwargs):
+        if cls._instance is None:
+            cls._instance = super().__new__(cls)
+        return cls._instance
+    
+    def __init__(self, path):
+        self.path = Path(path)
+        self.conn = sqlite3.connect(self.path)
+        self.conn.row_factory = sqlite3.Row
+
+    def create_table(self, table_name, attributes: list[DBAttr]):
+        columns_sql = ",\n    ".join(attr.sql() for attr in attributes)
+
+        query = f"""
+        CREATE TABLE IF NOT EXISTS {table_name} (
+            {columns_sql}
+        );
+        """
+
+        try:
+            with self.conn:
+                self.conn.execute(query)
+        except Exception as e:
+            print("Error creating table:", e)
+
+    def get_all(self, table_name):
+        try:
+            cursor = self.conn.execute(f"SELECT * FROM {table_name};")
+            return [dict(row) for row in cursor.fetchall()]
+        except Exception as e:
+            print("Error selecting:", e)
+            return []
+        
+    def get_singleton(self, singleton_table):
+        try:
+            cursor = self.conn.execute(f"SELECT * FROM {singleton_table}")
+            return [row[0] for row in cursor.fetchall()]
+        except Exception as e:
+            print("Error selecting:", e)
+            return []
+
+    def get_by(self, table_name, column, value):
+        try:
+            query = f"SELECT * FROM {table_name} WHERE {column} = ?;"
+            cursor = self.conn.execute(query, (value,))
+            return [dict(row) for row in cursor.fetchall()]
+        except Exception as e:
+            print("Error selecting:", e)
+            return []
+
+    def insert(self, table_name, data: dict):
+        keys = ", ".join(data.keys())
+        placeholders = ", ".join("?" for _ in data)
+        values = tuple(data.values())
+
+        query = f"""
+        INSERT INTO {table_name} ({keys})
+        VALUES ({placeholders});
+        """
+
+        try:
+            with self.conn:
+                self.conn.execute(query, values)
+        except Exception as e:
+            print("Error inserting:", e)
+
+    def update(self, table_name, data: dict, where_column, where_value):
+        set_clause = ", ".join(f"{key} = ?" for key in data.keys())
+        values = list(data.values())
+        values.append(where_value)
+
+        query = f"""
+        UPDATE {table_name}
+        SET {set_clause}
+        WHERE {where_column} = ?;
+        """
+
+        try:
+            with self.conn:
+                self.conn.execute(query, tuple(values))
+        except Exception as e:
+            print("Error updating:", e)
+
+    def delete(self, table_name, where_column, where_value):
+        query = f"DELETE FROM {table_name} WHERE {where_column} = ?;"
+
+        try:
+            with self.conn:
+                self.conn.execute(query, (where_value,))
+        except Exception as e:
+            print("Error deleting:", e)
+            
+    def clear(self, table_name):
+        query = f"DELETE FROM {table_name};"
+        
+        try:
+            with self.conn:
+                self.conn.execute(query)
+        except Exception as e:
+            print("Error clearing table: ", e)
+
+    def exists(self, table_name, where_column, where_value):
+        query = f"SELECT 1 FROM {table_name} WHERE {where_column} = ? LIMIT 1;"
+
+        try:
+            cursor = self.conn.execute(query, (where_value,))
+            return cursor.fetchone() is not None
+        except Exception as e:
+            print("Error checking existence:", e)
+            return False
+
+    def count(self, table_name):
+        try:
+            cursor = self.conn.execute(f"SELECT COUNT(*) as total FROM {table_name};")
+            return cursor.fetchone()["total"]
+        except Exception as e:
+            print("Error counting:", e)
+            return 0
+
+    def close(self):
+        self.conn.close()

ejercicios/beautifulsoup/ej4/data/src/main.py

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+from bs4 import BeautifulSoup
+import re
+from tkinter import Tk
+from tkinter import messagebox
+import urllib.request
+from datetime import datetime
+
+from db import DBManager, DBAttr
+from ui import WinesUI
+from __ssl import init_ssl
+from config import *
+
+init_ssl()
+
+dbm = DBManager(DB_PATH)
+
+def create_tables():
+    movies_attr = [
+        DBAttr("title", "TEXT", "NOT NULL"),
+        DBAttr("original_title", "TEXT", "NOT NULL"),
+        DBAttr("country", "TEXT", "NOT NULL"),
+        DBAttr("date", "DATE", "NOT NULL"),
+        DBAttr("director", "TEXT", "NOT NULL"),
+        DBAttr("genres", "TEXT", "NOT NULL")
+    ]
+    
+    genres_attr = [
+        DBAttr("genre", "TEXT")
+    ]
+
+    dbm.create_table("movies", movies_attr)
+    dbm.create_table("genres", genres_attr)
+    
+def parse_duration(duration):
+    duration.strip()
+    res = 0
+    if duration[-1] == "h":
+        duration.replace("h","")
+        res = int(duration) * 60
+    elif "h" in duration:
+        duration.replace("h","")
+        duration.replace("m","")
+        res = int(duration[0]) + int(duration[1:]) 
+    else:
+        duration.replace("m","")
+        res = int(duration)
+    return res
+
+def main():        
+    create_tables()
+    root = Tk()
+    ui = WinesUI(root)
+
+
+    def handle_action(action):
+        match(action):
+            case "cargar":
+                resp = messagebox.askyesno(title="Cargar", message="Quieres cargar todos los datos de nuevo?")
+                if resp:
+                    dbm.clear("movies")
+                    dbm.clear("genres")
+                    movies_count = persit_recetas()
+                    ui.info(f"Hay {movies_count} recetas")
+            case "Recetas":
+                recetas = dbm.get_all("recetas")
+                ui.show_list(recetas, ["titulo", "dificultad", "comensales", "duracion", "autor", "fecha"])
+            case "Receta por autor":
+                def search_title(title):
+                    movies = [movie for movie in dbm.get_all("recetas") if title.lower() in movie["titulo"].lower()]
+                ui.show_list(recetas, ["titulo", "dificultad", "comensales", "duracion", "autor", "fecha"])
+                ui.ask_text("Buscar por autor: ", search_title)
+            case "Receta por fecha":
+                def search_date(date):
+                    d = datetime.strptime(date, "%d-%m-%Y")
+                    movies = [movie for movie in dbm.get_all("movies") 
+                            if d < datetime.strptime(movie["date"], "%Y-%m-%d %H:%M:%S")]
+                    ui.show_list(movies, ["title", "date"])
+                ui.ask_text("Buscar por fecha: ", search_date)
+           
+    ui.callback = handle_action
+    root.mainloop()
+    dbm.close()
+            
+if __name__ == "__main__":
+    main()

ejercicios/beautifulsoup/ej4/data/src/ui.py

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+import tkinter as tk
+from tkinter import ttk, messagebox
+from tkinter.scrolledtext import ScrolledText
+
+class WinesUI():
+    def __init__(self, root, title = "AII"):
+        self.root = root
+        self.root.title(title)
+        self.root.geometry("900x600")
+                
+        # Menu Principal
+        self.menu = tk.Menu(self.root)
+        self.root.config(menu=self.menu)
+
+        # Menu Datos
+        datos_menu = tk.Menu(self.menu, tearoff=0)
+        datos_menu.add_command(label="Cargar", command=lambda: self.callback("cargar"))
+        datos_menu.add_separator()
+        datos_menu.add_command(label="Salir", command=self.root.quit)
+        self.menu.add_cascade(label="Datos", menu=datos_menu)
+
+        # Menu Listar
+        listar_menu = tk.Menu(self.menu, tearoff=0)
+        listar_menu.add_command(label= "Recetas", command = lambda:  self.callback("listar_recetas"))
+
+        # Menu Buscar
+        buscar_menu = tk.Menu(self.menu, tearoff=0)
+        buscar_menu.add_command(label="Receta por autor", command=lambda: self.callback("buscar_autor"))
+        buscar_menu.add_command(label="Receta por fecha", command=lambda: self.callback("buscar_fecha"))
+
+        self.menu.add_cascade(label="Buscar", menu=buscar_menu)
+
+        # Callback externo desde el punto de entrada
+        self.callback = None
+        
+    def show_list(self, items, fields, title="Listado"):
+        mw = tk.Toplevel(self.root)
+        mw.title(title)
+        listbox = tk.Listbox(mw, width=80, height=20)
+        listbox.pack(side="left", fill="both", expand=True)
+        scrollbar = tk.Scrollbar(mw)
+        scrollbar.pack(side="right", fill="y")
+        listbox.config(yscrollcommand=scrollbar.set)
+        scrollbar.config(command=listbox.yview)
+        
+        for item in items:
+            row = " | ".join(str(item[field]) for field in fields)
+            listbox.insert("end", row)
+            
+    def ask_text(self, label, callback):
+        mw = tk.Toplevel(self.root)
+        mw.title(label)
+        tk.Label(mw, text=label).pack(pady=5)
+        entry = ttk.Entry(mw)
+        entry.pack(pady=5)
+        ttk.Button(mw, text="Aceptar", command=
+                    lambda: [callback(entry.get()), mw.destroy()]).pack(pady=10)   
+    
+    def ask_spinbox(self, label, options, callback):
+        mw = tk.Toplevel(self.root)
+        mw.title(label)
+        tk.Label(mw, text=label).pack(pady=5)
+        spinbox = ttk.Spinbox(mw, values=options, state="readonly", width=40)
+        spinbox.pack(pady=5)
+        ttk.Button(mw, text="Aceptar", command=
+                    lambda: [callback(spinbox.get()), mw.destroy()]).pack(pady=10)
+        
+    def ask_radiobutton(self, label, options, callback):
+        mw = tk.Toplevel(self.root)
+        mw.title(label)
+        tk.Label(mw, text=label).pack(pady=5)
+        sv = tk.StringVar(value=options[0])
+        for option in options:
+            tk.Radiobutton(mw, text=option, variable=sv, value=option).pack(anchor="w")
+        ttk.Button(mw, text="Aceptar", command=
+                    lambda: [callback(sv.get()), mw.destroy()]).pack(pady=10)
+        
+    def info(slef, message):
+        messagebox.showinfo("Información", message)