Update citations (#22)

Author: Grufoony

_cite/cite.py

@@ -29,7 +29,7 @@
 sources = []
 
 # in-order list of plugins to run
-plugins = ["google-scholar", "pubmed", "orcid", "sources"]
+plugins = ["google-scholar", "pubmed", "orcid", "arxiv", "sources"]
 
 # loop through plugins
 for plugin in plugins:

_cite/plugins/arxiv.py

@@ -0,0 +1,59 @@
+import json
+from urllib.request import Request, urlopen
+from urllib.parse import quote
+from util import *
+
+
+def main(entry):
+    """
+    receives single list entry from arxiv data file
+    returns list of sources to cite
+    """
+
+    # arxiv api endpoint
+    endpoint = "http://export.arxiv.org/api/query?search_query=au:$AUTHOR&start=0&max_results=1000"
+
+    # get author from entry
+    author = get_safe(entry, "author", "")
+    if not author:
+        raise Exception('No "author" key')
+
+    # query api
+    @log_cache
+    @cache.memoize(name=__file__, expire=1 * (60 * 60 * 24))
+    def query(author):
+        url = endpoint.replace("$AUTHOR", quote(author))
+        request = Request(url=url)
+        response = urlopen(request).read().decode('utf-8')
+        return response
+
+    response = query(author)
+
+    # list of sources to return
+    sources = []
+
+    # parse XML response
+    import xml.etree.ElementTree as ET
+    root = ET.fromstring(response)
+    
+    # namespace for arxiv
+    ns = {'atom': 'http://www.w3.org/2005/Atom',
+          'arxiv': 'http://arxiv.org/schemas/atom'}
+
+    # go through response and format sources
+    for work in root.findall('atom:entry', ns):
+        # extract arxiv id from the id field
+        id_element = work.find('atom:id', ns)
+        if id_element is not None and id_element.text:
+            arxiv_id = id_element.text.split('/abs/')[-1]
+            
+            # create source with arxiv identifier for Manubot
+            source = {"id": f"arxiv:{arxiv_id}"}
+
+            # copy fields from entry to source
+            source.update(entry)
+
+            # add source to list
+            sources.append(source)
+
+    return sources