104 lines
3.6 KiB
Python
104 lines
3.6 KiB
Python
"""
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Instagram Image Tag
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-------------------
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By `Tom Spalding <https://github.com/digitalvapor>`_
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You can see a working example at `antivapor.net/instagram-tag.html <http://antivapor.net/instagram-tag.html>`_.
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Based on `Liquid Image Tag <https://github.com/getpelican/pelican-plugins/blob/master/liquid_tags/img.py>`_ by `Jake Vanderplas <https://github.com/jakevdp>`_.
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Optional Todo:
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* Query JSON to automatically include descriptions.
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http://api.instagram.com/oembed?url=http://instagr.am/p/olw8jXiz1_/
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and option to add wrapping anchor link to original http://instagram.com/p/olw8jXiz1_
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* Default to size m
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http://instagr.am/p/olw8jXiz1_/media/?size=t
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http://instagr.am/p/olw8jXiz1_/media
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* Provide examples using with [Better Figures and Images](https://github.com/getpelican/pelican-plugins/tree/master/better_figures_and_images).
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Syntax
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------
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{% gram shortcode [size] [width] [class name(s)] [title text | "title text" ["alt text"]] %}
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where size is t, m, or l, and it defaults to m. see http://instagram.com/developer/embedding.
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Examples
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--------
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{% gram pFG7naIZkr t %}
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{% gram pFJE11IZnx %}
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{% gram pFI0CAIZna l 400 figure 'pretty turkey tail fungus' %}
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{% gram rOru21oZpe l 450 test_class instagram 'warehouse window title' 'alt text' %}
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Output
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------
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<img src="http://photos-c.ak.instagram.com/hphotos-ak-xaf1/t51.2885-15/917172_604907902963826_254280879_n.jpg" width="450" title="warehouse window title" alt="alt text" class="test_class instagram">
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"""
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import re
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try:
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from urllib.request import urlopen
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except ImportError:
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from urllib import urlopen
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from .mdx_liquid_tags import LiquidTags
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SYNTAX = '{% gram shortcode [size] [width] [class name(s)] [title text | "title text" ["alt text"]] %}'
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# Regular expression for full syntax
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# ReGram = re.compile("""(?P<shortcode>\S+)(?:\s+(?P<size>[tml]?))?(?:\s+(?P<width>\d*))?(?:\s+(?P<class>\S*))?(?P<title>\s+.+)?""")
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ReGram = re.compile("""(?P<shortcode>\S+)(?:\s+(?P<size>[tml]?))?(?:\s+(?P<width>\d*))?(?:\s+(?P<class>[^']*))?(?P<title>.+)?""")
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# Regular expression to split the title and alt text
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ReTitleAlt = re.compile("""(?:"|')(?P<title>[^"']+)?(?:"|')\s+(?:"|')(?P<alt>[^"']+)?(?:"|')""")
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@LiquidTags.register('gram')
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def gram(preprocessor, tag, markup):
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attrs = None
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# Parse the markup string
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match = ReGram.search(markup)
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if match:
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attrs = dict([(key, val.strip())
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for (key, val) in match.groupdict().items() if val])
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else:
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raise ValueError('Error processing input. '
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'Expected syntax: {0}'.format(SYNTAX))
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# Construct URI
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#print(attrs)
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shortcode = attrs['shortcode']
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url = 'http://instagr.am/p/'+shortcode+'/media/'
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del attrs['shortcode']
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if 'size' in attrs:
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size = '?size={0}'.format(attrs['size'])
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url = url+size
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del attrs['size']
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r = urlopen(url)
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if(r.getcode()==404):
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raise ValueError('%s isnt a photo.'%shortcode)
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gram_url = r.geturl()
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# Check if alt text is present -- if so, split it from title
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if 'title' in attrs:
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match = ReTitleAlt.search(attrs['title'])
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if match:
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attrs.update(match.groupdict())
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if not attrs.get('alt'):
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attrs['alt'] = attrs['title']
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#print('updated dict: '+repr(attrs))
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# Return the formatted text
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return '<img src="{0}"{1}>'.format(gram_url,' '.join(' {0}="{1}"'.format(key,val) for (key,val) in attrs.items()))
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#----------------------------------------------------------------------
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# This import allows image tag to be a Pelican plugin
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from liquid_tags import register
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