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import os
import re
import glob
import app.settings.app_cfg as cfg
from app.utils.file_utils import load_json
def read_metadata(fn):
"""
Read in read a markdown file and extract the metadata
"""
with open(fn, "r") as file:
data = file.read()
data = data.replace("\n ", "\n")
if "\n" in data:
data = data.replace("\r", "")
else:
data = data.replace("\r", "\n")
sections = data.split("\n\n")
return parse_metadata(fn, sections)
default_metadata = {
'status': 'published',
'title': 'Untitled Page',
'desc': '',
'slug': '',
'published': '2018-12-31',
'updated': '2018-12-31',
'authors': 'Adam Harvey',
'sync': 'true',
'tagline': '',
}
def parse_metadata(fn, sections):
"""
parse the metadata headers in a markdown file
(everything before the second ---------)
- determines appropriate urls for this page
- loads paper if any
"""
found_meta = False
metadata = {}
valid_sections = []
for section in sections:
if not found_meta and ': ' in section:
found_meta = True
parse_metadata_section(metadata, section)
continue
if '-----' in section:
continue
if found_meta:
valid_sections.append(section)
if 'title' not in metadata:
print('warning: {} has no title'.format(fn))
for key in default_metadata:
if key not in metadata:
metadata[key] = default_metadata[key]
basedir = os.path.dirname(fn.replace(cfg.DIR_SITE_CONTENT, ''))
basename = os.path.basename(fn)
if basedir == '/':
metadata['path'] = '/'
metadata['url'] = '/'
elif basename == 'index.md':
metadata['path'] = basedir + '/'
metadata['url'] = metadata['path']
else:
metadata['path'] = basedir + '/'
metadata['url'] = metadata['path'] + basename.replace('.md', '') + '/'
if metadata['status'] == 'published|draft|private':
metadata['status'] = 'published'
metadata['og_desc'] = re.sub('<[^<]+?>', '', metadata['desc'])
metadata['sync'] = metadata['sync'] != 'false'
metadata['author_html'] = '<br>'.join(metadata['authors'].split(','))
dataset_path = os.path.join(cfg.DIR_SITE_FINAL_CITATIONS, metadata['slug'] + '.json')
if os.path.exists(dataset_path):
metadata['meta'] = load_json(dataset_path)
if not metadata['meta']:
print("Bad metadata? {}".format(dataset_path))
metadata['meta'] = {}
return metadata, valid_sections
def parse_metadata_section(metadata, section):
"""
parse a metadata key: value pair
"""
for line in section.split("\n"):
if ': ' not in line:
continue
key, value = line.split(': ', 1)
metadata[key.lower()] = value
def read_research_post_index():
"""
Generate an index of the research (blog) posts
"""
return read_post_index('research')
def read_datasets_index():
"""
Generate an index of the datasets
"""
return read_post_index('datasets')
def read_post_index(basedir):
"""
Generate an index of posts
"""
posts = []
for fn in sorted(glob.glob(os.path.join(cfg.DIR_SITE_CONTENT, basedir, '*/index.md'))):
metadata, valid_sections = read_metadata(fn)
if metadata is None or metadata['status'] == 'private' or metadata['status'] == 'draft':
continue
posts.append(metadata)
if not len(posts):
posts.append({
'title': 'Placeholder',
'slug': 'placeholder',
'date': 'Placeholder',
'url': '/',
})
return posts
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