import logging
import magic
from crispy_forms.helper import FormHelper
from crispy_forms.layout import Submit
from django import forms
from .models import ResourceCategory
from .models import ResourceType
logger = logging.getLogger(__name__)
ALLOWED_THUMBNAILS = 5
ALLOWED_PDFS = 20
class ResourceCreateForm(forms.Form):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.helper = FormHelper(self)
self.helper.add_input(Submit("submit", "Submit"))
error_css_class = "error"
required_css_class = "required"
name = forms.CharField(
max_length=255,
help_text="Concisely describe what the resource is, aiming for"
"35-45 characters. "
"eg: 'Fractions KS2 Worksheet and Answers.'",
)
description = forms.CharField(
max_length=1000,
widget=forms.Textarea,
help_text="This is your opportunity to clearly explain what your resource "
"is all "
"about! It’s worth remembering that you are using the space to "
"communicate to two "
"different audiences. Firstly, think about what fellow teachers "
"would like "
"to know, such as exactly what the resource contains and how it "
"could be used in the classroom. Secondly, the words you include "
"on this page are also talking to internal and external search "
"engines."
" External search engines, like Google, show the first 155 characters "
"of the resource description, so make sure you take advantage "
"of these "
"characters by using lots of relevant keywords as part of an "
"enticing pitch.",
)
resource_type = forms.ModelChoiceField(queryset=ResourceType.objects.all())
age_range = forms.ChoiceField(
choices=[
("3-5", "3-5"),
("5-7", "5-7"),
("7-11", "7-11"),
("11-14", "11-14"),
("14-16", "14-16"),
("16+", "16+"),
("Age not applicable", "Age not applicable"),
],
help_text="Try to be accurate in your choice of age range so that your resource "
"shows up in the correct searches. (Although we don't have searches yet!)",
)
curriculum = forms.ChoiceField(
choices=[
("No curriculum", "No curriculum"),
("English", "English"),
("Scottish", "Scottish"),
],
)
main_resource_category = forms.ModelChoiceField(
queryset=ResourceCategory.objects.all(),
help_text="Categorise your resource by subject so it shows up in the correct "
"searches. It's a good idea to limit the number of subjects you select "
"to one or two to make your resource easier to find.",
)
additional_resource_category = forms.ModelChoiceField(
queryset=ResourceCategory.objects.all(),
required=False,
)
pdf_files = forms.FileField(
widget=forms.TextInput(
attrs={
"multiple": True,
"type": "File",
"required": True,
},
),
required=False,
help_text="You can multi-select up to 20 .pdf files here.",
label="PDF files",
)
thumbnail_files = forms.FileField(
widget=forms.TextInput(
attrs={
"multiple": True,
"type": "File",
"required": True,
},
),
required=False,
label="Cover images",
help_text="Your cover image will be displayed in the search results and as "
"the first image on your resource page in the preview function. "
"It is important to add an eye catching cover image that gives "
"other teachers an idea about what your resource contains. "
"You can multi-select up to 5 .png or .jpg files here.",
)
pdf_files.widget.attrs.update({"class": "file_upload", "accept": ".pdf"})
thumbnail_files.widget.attrs.update({"class": "file_upload", "accept": ".png,.jpg"})
def clean_thumbnail_files(self):
thumbnail_files = self.files.getlist("thumbnail_files")
if not thumbnail_files:
raise forms.ValidationError("Please select at least one thumbnail file.")
acceptable = ["image/png", "image/jpeg"]
for f in thumbnail_files:
content_type = magic.from_buffer(f.file.read(), mime=True)
f.file.seek(0)
if content_type not in acceptable:
raise forms.ValidationError("Please select only PNG or JPG files.")
if len(thumbnail_files) > ALLOWED_THUMBNAILS:
raise forms.ValidationError("Please select up to 5 files.")
return thumbnail_files
def clean_pdf_files(self):
pdf_files = self.files.getlist("pdf_files")
if not pdf_files:
raise forms.ValidationError("Please select at least one PDF file.")
acceptable = ["application/pdf"]
for f in pdf_files:
content_type = magic.from_buffer(f.file.read(), mime=True)
f.file.seek(0)
if content_type not in acceptable:
raise forms.ValidationError("Please select only PDF files.")
if len(pdf_files) > ALLOWED_PDFS:
raise forms.ValidationError("Please select up to 20 PDF files.")
return pdf_files
