2 files changed, 67 insertions, 0 deletions
diff --git a/python/fatcat_tools/transforms/__init__.py b/python/fatcat_tools/transforms/__init__.py
index 735d1b29..6a4b1bba 100644
--- a/python/fatcat_tools/transforms/__init__.py
+++ b/python/fatcat_tools/transforms/__init__.py
@@ -2,3 +2,4 @@
 from .entities import entity_to_dict, entity_from_json, entity_from_dict
 from .elasticsearch import release_to_elasticsearch, container_to_elasticsearch, changelog_to_elasticsearch
 from .csl import release_to_csl, citeproc_csl
+from .ingest import release_ingest_request
diff --git a/python/fatcat_tools/transforms/ingest.py b/python/fatcat_tools/transforms/ingest.py
new file mode 100644
index 00000000..eee60630
--- /dev/null
+++ b/python/fatcat_tools/transforms/ingest.py
@@ -0,0 +1,66 @@
+
+from .elasticsearch import release_to_elasticsearch
+
+def release_ingest_request(release, oa_only=False, project='fatcat'):
+    """
+    Takes a full release entity object and returns an ingest request (as dict),
+    or None if it seems like this release shouldn't be ingested.
+
+    The release entity should have the container, file, fileset, and webcapture
+    fields set.
+
+    The 'oa_only' boolean flag indicates that we should only return an ingest
+    request if we have reason to believe this is an OA release (or, eg, in
+    arxiv or pubmed central). Respecting this flag means we are likely to miss
+    a lot of "hybrid" and "bronze" content, but could reduce load
+    significantly.
+
+    The type of the ingest request may depend on release type and container
+    metadata (eg, as to whether we expect a PDF, datasets, web page), so
+    calling code should check the returned type field.
+    """
+
+    if release.state != 'active':
+        return None
+
+    # generate a URL where we expect to find fulltext
+    url = None
+    expect_mimetypes = []
+    if release.ext_ids.arxiv:
+        url = "https://arxiv.org/pdf/{}.pdf".format(release.ext_ids.arxiv)
+        expect_mimetypes = ['application/pdf']
+    elif release.ext_ids.pmcid:
+        #url = "https://www.ncbi.nlm.nih.gov/pmc/articles/{}/pdf/".format(release.pmcid)
+        url = "http://europepmc.org/backend/ptpmcrender.fcgi?accid={}&blobtype=pdf".format(release.pmcid)
+        expect_mimetypes = ['application/pdf']
+    elif release.ext_ids.doi:
+        url = "https://doi.org/{}".format(release.ext_ids.doi)
+
+    if not url:
+        return None
+
+    ext_ids = dict()
+    for k in ('doi', 'pmid', 'pmcid', 'arxiv'):
+        v = getattr(release.ext_ids, k)
+        if v:
+            ext_ids[k] = v
+
+    if oa_only and not ext_ids['arxiv'] and not ext_ids['pmcid']:
+        es = release_to_elasticsearch(release)
+        if not es['is_oa']:
+            return None
+
+    ingest_request = {
+        'ingest_type': 'file',
+        'project': project,
+        'base_url': url,
+        'fatcat': {
+            'release_stage': release.release_stage,
+            'release_ident': release.ident,
+            'work_ident': release.work_id,
+        },
+        'ext_ids': ext_ids,
+        'expect_mimetypes': expect_mimetypes or None,
+    }
+    return ingest_request
+