blog

import subprocess

from django.utils.translation import ugettext as _

from django.shortcuts import get_object_or_404, render # This allows to render the template with the view here. It's pretty cool and important.

from django.http import HttpResponseRedirect, HttpResponse

from django.core.urlresolvers import reverse # Why?

from django.template import loader # This allows to actually load the template.

from django.contrib.auth.decorators import login_required

from django.contrib.auth import authenticate, login

from .models import Post

from django.core.exceptions import ObjectDoesNotExist

from django.utils import translation

GERMAN = "de"

SPANISH = "es"

FRENCH = "fr"

DUTCH = "nl"

ENGLISH = "en"

# FIXME: Remove this template trash. THIS IS A VIEW, NOT A FUCKING TEMPLATE FFS

context = {

    'materialDesign_color': "green",

    'materialDesign_accentColor': "purple",

    'navbar_title': "Blog",

    'navbar_fixed': True,

    'navbar_backArrow': True,

    #'footer_title': "Maarten's blog",

    #'footer_description': "My personal scribbly notepad.",

    #'footer_links': footer_links,

    }

def markdown_to_html(file_path):

    """ Converts the given Markdown formatted file to HTML.

    This function directly returns the resulting HTML code. This function uses

    the amazing Haskell library Pandoc to convert the file (and takes care

    of header id's and all that stuff).

    """

    # FIXME: Remove hardcoded link to media. Replace with media tag!

    return subprocess.check_output(["pandoc", "--from=org", "--to=html", "/srv/django/website/media/"+file_path])

def get_available_post_languages(post):

    """ Returns the language codes for which a blog post exists. This function

    always returns English (because that field mustn't be empty).

    So say a blog post has an English, Dutch and French version (which means

    english_file, french_file and dutch_file aren't empty), the function will return {"en",

    "fr", "nl"}. """

    available_languages = {ENGLISH}

    if post.german_file is not None:

        available_languages.add(GERMAN)

    if post.spanish_file is not None:

        available_languages.add(SPANISH)

    if post.french_file is not None:

        available_languages.add(FRENCH)

    if post.dutch_file is not None:

        available_languages.add(DUTCH)

    return available_languages

def get_preferred_post_language(post, language):

    """ Returns the post language file that best suits the given language. This

    is handy if you know what language the user prefers, but aren't sure whether

    you can provide that language. This function will try to provide the file

    for that language, or return English if that's not possible. """

    if language == GERMAN and post.german_file is not None:

        return post.german_file

    if language == SPANISH and post.spanish_file is not None:

        return post.spanish_file

    if language == FRENCH and post.french_file is not None:

        return post.french_file

    if language == DUTCH and post.dutch_file is not None:

        return post.dutch_file

    return post.english_file  # Returned if all other choices wouldn't be satisfactory, or the requested language is English.

def index(request):

    template = "blog/index.html"

    posts = Post.objects.all()

    language = translation.get_language()

    post_links = []

    for post in posts:

        blog_file = get_preferred_post_language(post, language)

        # TODO: Find a cleaner way to determine the title. First and foremost:

        # If the language differs from English, the other language file needs to

        # be loaded. Plus: look for a built in function to remove the full path

        # and only return the file name.

        title = (blog_file.name.rpartition("/")[2]).rpartition(".")[0]

        date = post.published

        blog_text = markdown_to_html(blog_file.name)

        # TODO: The link can possibly be reversed in the DTL using the title, which is actually

        # a cleaner way to do it. Investigate.

        link = reverse("blog-post", args=[str(post)])

        post_links.append([title, date, description, link])

    context = {

            'post_links': post_links,

            'materialDesign_color': "brown",

            'materialDesign_accentColor': "yellow",

            'navbar_title': _("Notepad from a student"),

            'navbar_backArrow': True,

            }

    return render(request, template, context)

def post(request, title):

    template = "blog/post.html"

    posts = Post.objects.all()

    for post in posts:

        if str(post)==title:

            language = translation.get_language()

            blog_file = get_preferred_post_language(post, language)

            blog_text = markdown_to_html(blog_file.name)

            context = {

                'materialDesign_color': "brown",

                'materialDesign_accentColor': "yellow",

                'article': blog_text,

                'title': blog_file.name,

                'navbar_title': (blog_file.name.rpartition("/")[2]).rpartition(".")[0],

                'navbar_backArrow': True,

                }

            return render(request, template, context)