Django Forms

# forms.py
from django import forms
from django.contrib.auth.forms import UserCreationForm
from django.contrib.auth.models import User
from .models import Post, Comment

# Basic form
class ContactForm(forms.Form):
    name = forms.CharField(max_length=100, widget=forms.TextInput(attrs={
        'class': 'form-control',
        'placeholder': 'Your name'
    }))
    email = forms.EmailField(widget=forms.EmailInput(attrs={
        'class': 'form-control',
        'placeholder': 'your@email.com'
    }))
    subject = forms.CharField(max_length=200, widget=forms.TextInput(attrs={
        'class': 'form-control',
        'placeholder': 'Subject'
    }))
    message = forms.CharField(widget=forms.Textarea(attrs={
        'class': 'form-control',
        'rows': 5,
        'placeholder': 'Your message'
    }))
    
    def clean_email(self):
        email = self.cleaned_data.get('email')
        if email and 'spam' in email:
            raise forms.ValidationError("Spam emails are not allowed.")
        return email

# Model form
class PostForm(forms.ModelForm):
    class Meta:
        model = Post
        fields = ['title', 'content', 'category', 'published_date']
        widgets = {
            'title': forms.TextInput(attrs={'class': 'form-control'}),
            'content': forms.Textarea(attrs={'class': 'form-control', 'rows': 10}),
            'category': forms.Select(attrs={'class': 'form-control'}),
            'published_date': forms.DateTimeInput(attrs={
                'class': 'form-control',
                'type': 'datetime-local'
            })
        }
    
    def clean_title(self):
        title = self.cleaned_data.get('title')
        if len(title) < 5:
            raise forms.ValidationError("Title must be at least 5 characters long.")
        return title

# User registration form
class CustomUserCreationForm(UserCreationForm):
    email = forms.EmailField(required=True, widget=forms.EmailInput(attrs={
        'class': 'form-control',
        'placeholder': 'Email address'
    }))
    
    class Meta:
        model = User
        fields = ['username', 'email', 'password1', 'password2']
        widgets = {
            'username': forms.TextInput(attrs={'class': 'form-control'})
        }

# Comment form
class CommentForm(forms.ModelForm):
    class Meta:
        model = Comment
        fields = ['content']
        widgets = {
            'content': forms.Textarea(attrs={
                'class': 'form-control',
                'rows': 3,
                'placeholder': 'Write your comment...'
            })
        }

# File upload form
class FileUploadForm(forms.Form):
    title = forms.CharField(max_length=100)
    description = forms.CharField(widget=forms.Textarea, required=False)
    file = forms.FileField(
        widget=forms.FileInput(attrs={'class': 'form-control'}),
        help_text='Upload your file here'
    )
    
    def clean_file(self):
        file = self.cleaned_data.get('file')
        if file:
            if file.size > 5 * 1024 * 1024:  # 5MB limit
                raise forms.ValidationError("File size must be under 5MB.")
            if not file.name.endswith(('.pdf', '.doc', '.docx')):
                raise forms.ValidationError("Only PDF and Word documents are allowed.")
        return file