import os
from pelican import signals

def add_gallery_post(generator):

    contentpath = generator.settings.get('PATH')    
    gallerycontentpath = os.path.join(contentpath,'images/gallery')
    
    
    for article in generator.articles:
        if 'gallery' in article.metadata.keys():
            album = article.metadata.get('gallery')
            galleryimages = []
            
            articlegallerypath=os.path.join(gallerycontentpath, album)
            
            if(os.path.isdir(articlegallerypath)):       
                for i in os.listdir(articlegallerypath):
                    if os.path.isfile(os.path.join(os.path.join(gallerycontentpath, album), i)):
                        galleryimages.append(i)
        
            article.album=album
            article.galleryimages=galleryimages



def generate_gallery_page(generator):

    contentpath = generator.settings.get('PATH')    
    gallerycontentpath = os.path.join(contentpath,'images/gallery')
    
    
    for page in generator.pages:
        if page.metadata.get('template') == 'gallery':
            gallery=dict()
        
            for a in os.listdir(gallerycontentpath):
                if os.path.isdir(os.path.join(gallerycontentpath, a)):
                   
                    for i in os.listdir(os.path.join(gallerycontentpath, a)):
                        if os.path.isfile(os.path.join(os.path.join(gallerycontentpath, a), i)):
                            gallery.setdefault(a, []).append(i)
        
            page.gallery=gallery



def register():
    signals.article_generator_finalized.connect(add_gallery_post)
    signals.page_generator_finalized.connect(generate_gallery_page)