1 files changed, 60 insertions, 0 deletions
diff --git a/python/fatcat_tools/transforms/access.py b/python/fatcat_tools/transforms/access.py
new file mode 100644
index 00000000..5ed64c7c
--- /dev/null
+++ b/python/fatcat_tools/transforms/access.py
@@ -0,0 +1,60 @@
+
+from enum import Enum
+from typing import Optional, List
+
+from pydantic import BaseModel
+from fatcat_openapi_client import ReleaseEntity
+
+
+class AccessType(str, Enum):
+    """describes type of access URL"""
+
+    wayback = "wayback"
+    ia_file = "ia_file"
+    ia_microfilm = "ia_microfilm"
+    repository = "repository"
+    openlibrary = "openlibrary"
+    wikipedia = "wikipedia"
+
+class AccessOption(BaseModel):
+
+    access_type: AccessType
+
+    # note: for `target_url` refs, would do a CDX lookup and this URL would be
+    # a valid/HTTP-200 web.archive.org capture URL
+    access_url: str
+
+    # application/pdf, text/html, etc
+    # blank for landing pages
+    mimetype: Optional[str]
+
+    size_bytes: Optional[int]
+    thumbnail_url: Optional[str]
+
+
+def release_access_options(release: ReleaseEntity) -> List[AccessOption]:
+    """
+    Extracts access options from a release.
+
+    TODO: proper implementation
+    """
+    options = []
+    for f in (release.files or []):
+        for u in (f.urls or []):
+            if '://web.archive.org/' in u.url:
+                return [AccessOption(
+                    access_type="wayback",
+                    access_url=u.url,
+                    mimetype=f.mimetype,
+                    size_bytes=f.size,
+                    thumbnail_url=None
+                )]
+            elif '://archive.org/' in u.url:
+                return [AccessOption(
+                    access_type="ia_file",
+                    access_url=u.url,
+                    mimetype=f.mimetype,
+                    size_bytes=f.size,
+                    thumbnail_url=None
+                )]
+    return options