2 files changed, 255 insertions, 76 deletions
diff --git a/python/Pipfile b/python/Pipfile
index 65317af..eefeead 100644
--- a/python/Pipfile
+++ b/python/Pipfile
@@ -37,7 +37,7 @@ internetarchive = "*"
 Flask = ">=1"
 urlcanon = "*"
 pillow = ">=3"
-poppler = ">=0.2"
+python-poppler = ">=0.2"
 
 # must lock black to an exact version because it is still "beta"
 # see: https://github.com/psf/black/issues/517
diff --git a/python/Pipfile.lock b/python/Pipfile.lock
index 7160eeb..56c3ab9 100644
--- a/python/Pipfile.lock
+++ b/python/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "1fd7e9f6efb64e1836f0903c177bff98947fdcf28a88257c9cf0cf342660c0ce"
+            "sha256": "e6299298a490fada53ec2f5ecbc8f11dd8cbbdfc6d818c84b2b4290722066798"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -37,6 +37,20 @@
             ],
             "version": "==3.10.0"
         },
+        "appdirs": {
+            "hashes": [
+                "sha256:7d5d0167b2b1ba821647616af46a749d1c653740dd0d2415100fe26e27afdf41",
+                "sha256:a841dacd6b99318a741b166adb07e19ee71a274450e68237b4650ca1055ab128"
+            ],
+            "version": "==1.4.4"
+        },
+        "attrs": {
+            "hashes": [
+                "sha256:08a96c641c3a74e44eb59afb61a24f2cb9f4d7188748e76ba4bb5edfa3cb7d1c",
+                "sha256:f7b7ce16570fe9965acd6d30101a28f62fb4a7f9e926b3bbc9b61f8b04247e72"
+            ],
+            "version": "==19.3.0"
+        },
         "backports.csv": {
             "hashes": [
                 "sha256:1277dfff73130b2e106bf3dd347adb3c5f6c4340882289d88f31240da92cbd6d",
@@ -52,6 +66,14 @@
             ],
             "version": "==4.9.1"
         },
+        "black": {
+            "hashes": [
+                "sha256:1b30e59be925fafc1ee4565e5e08abef6b03fe455102883820fe5ee2e4734e0b",
+                "sha256:c2edb73a08e9e0e6f65a0e6af18b059b8b1cdd5bef997d7a0b181df93dc81539"
+            ],
+            "index": "ia",
+            "version": "==19.10b0"
+        },
         "blinker": {
             "hashes": [
                 "sha256:471aee25f3992bd325afa3772f1063dbdbbca947a041b8b89466dc00d606f8b6"
@@ -60,18 +82,18 @@
         },
         "boto3": {
             "hashes": [
-                "sha256:009d0b483513e4c8639895c2b8dc451b41c9b863116d0234506b8b88b30a3d1b",
-                "sha256:f5218afc43c4c21ae2e8a1d4620d27ab6765250fe1f913ab234fbb686de87ae1"
+                "sha256:26c25a5d8483dbc5f7e1eeff9fadc6f5a200778ee642f8f5b827d5c78c4c5ca2",
+                "sha256:91f4c004bd3726007dd55d271a0e25ee5bf4d4861a4bddee318c23750773a4d0"
             ],
             "index": "ia",
-            "version": "==1.13.17"
+            "version": "==1.14.4"
         },
         "botocore": {
             "hashes": [
-                "sha256:cca04cd4bdb092a727772c38808f97e15f07dc609f6fbd7d7ba09c7734058794",
-                "sha256:f9627c718d480225cbfeeeb7b4a694b9cea3cae67940a4b673770cfaca328a81"
+                "sha256:25d568c4adff31f6f717a7679f799615946cc4ec3a0466ec287ac26dd11c153e",
+                "sha256:59cd8fda5f55e7c334efe514859b7a6a9e92aa00aef0c3ef65f20a2c2bf525ae"
             ],
-            "version": "==1.16.17"
+            "version": "==1.17.4"
         },
         "brotli": {
             "hashes": [
@@ -120,10 +142,10 @@
         },
         "certifi": {
             "hashes": [
-                "sha256:1d987a998c75633c40847cc966fcf5904906c920a7f17ef374f5aa4282abd304",
-                "sha256:51fcb31174be6e6664c5f69e3e1691a2d72a1a12e90f872cbdb1567eb47b6519"
+                "sha256:5ad7e9a056d25ffa5082862e36f119f7f7cec6457fa07ee2f8c339814b80c9b1",
+                "sha256:9cd41137dc19af6a5e03b630eefe7d1f458d964d406342dd3edf625839b944cc"
             ],
-            "version": "==2020.4.5.1"
+            "version": "==2020.4.5.2"
         },
         "chardet": {
             "hashes": [
@@ -365,6 +387,13 @@
             "index": "ia",
             "version": "==5.0.10"
         },
+        "pathspec": {
+            "hashes": [
+                "sha256:7d91249d21749788d07a2d0f94147accd8f845507400749ea19c1ec9054a12b0",
+                "sha256:da45173eb3a6f2a5a487efba21f050af2b41948be6ab52b6a1e3ff22bb8b7061"
+            ],
+            "version": "==0.8.0"
+        },
         "pillow": {
             "hashes": [
                 "sha256:02d2ae1d7c311e6fa038abda0843683ae652c9292d723270c85deeb04a1001a8",
@@ -381,6 +410,7 @@
                 "sha256:412f4999794a80c9153cd2156f040b8e570b145d2edf5830854578ffb0b27cac",
                 "sha256:4678857a6dd0834a77ad6b5eb75a6d79753aa1a13f54f1c47fdb1e9bca63f389",
                 "sha256:4756b77682c7335751a2cfc0e9e6d96945d88ffd315420d9010235021ddfc64c",
+                "sha256:482feca2305feef9d5c38bae66734c64d7d3e649e5b8e01115894ad6d399bad1",
                 "sha256:486f4ccddee09429cb1c63ea56c02894aecf9d69acdcaf006c53835df2549fff",
                 "sha256:502275e7a83872e62e0cd0be4da575a53a1f9703341aba814527dacdda3660a8",
                 "sha256:520dfe2ed09ea90a82d6876e87e82c82ba390d2b2936a95d8e9997eca281546f",
@@ -388,6 +418,7 @@
                 "sha256:5cda8efe9e0849858986c06cb068ac4de0933780f84fa989d6dae2a85c304d2b",
                 "sha256:61cb7e1ff212293d74155397fad008b052bc9633efdf9caa4271c316cd25b99f",
                 "sha256:68e45ed91531d3b05a17a356fd4cb928603a00259916e057730a024b029d6b51",
+                "sha256:699ad2e1a865433f89c7be40fed71d2497da525dc9938218ac3f222a464ea32a",
                 "sha256:69c3cc797a66241ed2fa61ff6f52c73e7bd3e738d80d64abb3500e6fbdec30a3",
                 "sha256:69ec2f0effe8b395e55929bb4d9a3ca8ff0c40f85d61d00e1e5b1e504d28b5e2",
                 "sha256:6a06f165dcec5789fd98a5d4fe542619ffd3b86b9bf616d1a54d824e9428c6d3",
@@ -415,6 +446,7 @@
                 "sha256:f040b4709cba8922f60de441684b3d061fedb61c6ca50d231df8a4d55e45943c",
                 "sha256:f336019509df1a042b7d6bed69a0cb6c52108b6327ce936c2870145dc18f1394"
             ],
+            "index": "ia",
             "version": "==3.1.1"
         },
         "psycopg2": {
@@ -470,6 +502,13 @@
             "index": "ia",
             "version": "==0.4.18"
         },
+        "python-poppler": {
+            "hashes": [
+                "sha256:5c0b3ba28919b6c592b0f71634c7fe5e2e7d699e0fa609df282e11099a515049"
+            ],
+            "index": "ia",
+            "version": "==0.2.0"
+        },
         "python-snappy": {
             "hashes": [
                 "sha256:9c0ba725755b749ef9b03f6ed7582cefb957c0d9f6f064a7c4314148a9dbdb61",
@@ -516,10 +555,36 @@
         },
         "redis": {
             "hashes": [
-                "sha256:2ef11f489003f151777c064c5dbc6653dfb9f3eade159bcadc524619fddc2242",
-                "sha256:6d65e84bc58091140081ee9d9c187aab0480097750fac44239307a3bdf0b1251"
-            ],
-            "version": "==3.5.2"
+                "sha256:0e7e0cfca8660dea8b7d5cd8c4f6c5e29e11f31158c0b0ae91a397f00e5a05a2",
+                "sha256:432b788c4530cfe16d8d943a09d40ca6c16149727e4afe8c2c9d5580c59d9f24"
+            ],
+            "version": "==3.5.3"
+        },
+        "regex": {
+            "hashes": [
+                "sha256:08997a37b221a3e27d68ffb601e45abfb0093d39ee770e4257bd2f5115e8cb0a",
+                "sha256:112e34adf95e45158c597feea65d06a8124898bdeac975c9087fe71b572bd938",
+                "sha256:1700419d8a18c26ff396b3b06ace315b5f2a6e780dad387e4c48717a12a22c29",
+                "sha256:2f6f211633ee8d3f7706953e9d3edc7ce63a1d6aad0be5dcee1ece127eea13ae",
+                "sha256:52e1b4bef02f4040b2fd547357a170fc1146e60ab310cdbdd098db86e929b387",
+                "sha256:55b4c25cbb3b29f8d5e63aeed27b49fa0f8476b0d4e1b3171d85db891938cc3a",
+                "sha256:5aaa5928b039ae440d775acea11d01e42ff26e1561c0ffcd3d805750973c6baf",
+                "sha256:654cb773b2792e50151f0e22be0f2b6e1c3a04c5328ff1d9d59c0398d37ef610",
+                "sha256:690f858d9a94d903cf5cada62ce069b5d93b313d7d05456dbcd99420856562d9",
+                "sha256:6ad8663c17db4c5ef438141f99e291c4d4edfeaacc0ce28b5bba2b0bf273d9b5",
+                "sha256:89cda1a5d3e33ec9e231ece7307afc101b5217523d55ef4dc7fb2abd6de71ba3",
+                "sha256:92d8a043a4241a710c1cf7593f5577fbb832cf6c3a00ff3fc1ff2052aff5dd89",
+                "sha256:95fa7726d073c87141f7bbfb04c284901f8328e2d430eeb71b8ffdd5742a5ded",
+                "sha256:97712e0d0af05febd8ab63d2ef0ab2d0cd9deddf4476f7aa153f76feef4b2754",
+                "sha256:b2ba0f78b3ef375114856cbdaa30559914d081c416b431f2437f83ce4f8b7f2f",
+                "sha256:bae83f2a56ab30d5353b47f9b2a33e4aac4de9401fb582b55c42b132a8ac3868",
+                "sha256:c78e66a922de1c95a208e4ec02e2e5cf0bb83a36ceececc10a72841e53fbf2bd",
+                "sha256:cf59bbf282b627130f5ba68b7fa3abdb96372b24b66bdf72a4920e8153fc7910",
+                "sha256:e3cdc9423808f7e1bb9c2e0bdb1c9dc37b0607b30d646ff6faf0d4e41ee8fee3",
+                "sha256:e9b64e609d37438f7d6e68c2546d2cb8062f3adb27e6336bc129b51be20773ac",
+                "sha256:fbff901c54c22425a5b809b914a3bfaf4b9570eee0e5ce8186ac71eb2025191c"
+            ],
+            "version": "==2020.6.8"
         },
         "requests": {
             "hashes": [
@@ -624,6 +689,13 @@
             ],
             "version": "==2.2.2"
         },
+        "toml": {
+            "hashes": [
+                "sha256:926b612be1e5ce0634a2ca03470f95169cf16f939018233a670519cb4ac58b0f",
+                "sha256:bda89d5935c2eac546d648028b9901107a595863cb36bae0c73ac804a9b4ce88"
+            ],
+            "version": "==0.10.1"
+        },
         "total-ordering": {
             "hashes": [
                 "sha256:a14a2a138a52befaa02b3fd53eb3366f66da69020be299af3cf0b54c9441aacc"
@@ -632,10 +704,10 @@
         },
         "tqdm": {
             "hashes": [
-                "sha256:4733c4a10d0f2a4d098d801464bdaf5240c7dadd2a7fde4ee93b0a0efd9fb25e",
-                "sha256:acdafb20f51637ca3954150d0405ff1a7edde0ff19e38fb99a80a66210d2a28f"
+                "sha256:07c06493f1403c1380b630ae3dcbe5ae62abcf369a93bbc052502279f189ab8c",
+                "sha256:cd140979c2bebd2311dfb14781d8f19bd5a9debb92dcab9f6ef899c987fcf71f"
             ],
-            "version": "==4.46.0"
+            "version": "==4.46.1"
         },
         "twitter": {
             "hashes": [
@@ -644,6 +716,32 @@
             ],
             "version": "==1.18.0"
         },
+        "typed-ast": {
+            "hashes": [
+                "sha256:0666aa36131496aed8f7be0410ff974562ab7eeac11ef351def9ea6fa28f6355",
+                "sha256:0c2c07682d61a629b68433afb159376e24e5b2fd4641d35424e462169c0a7919",
+                "sha256:249862707802d40f7f29f6e1aad8d84b5aa9e44552d2cc17384b209f091276aa",
+                "sha256:24995c843eb0ad11a4527b026b4dde3da70e1f2d8806c99b7b4a7cf491612652",
+                "sha256:269151951236b0f9a6f04015a9004084a5ab0d5f19b57de779f908621e7d8b75",
+                "sha256:4083861b0aa07990b619bd7ddc365eb7fa4b817e99cf5f8d9cf21a42780f6e01",
+                "sha256:498b0f36cc7054c1fead3d7fc59d2150f4d5c6c56ba7fb150c013fbc683a8d2d",
+                "sha256:4e3e5da80ccbebfff202a67bf900d081906c358ccc3d5e3c8aea42fdfdfd51c1",
+                "sha256:6daac9731f172c2a22ade6ed0c00197ee7cc1221aa84cfdf9c31defeb059a907",
+                "sha256:715ff2f2df46121071622063fc7543d9b1fd19ebfc4f5c8895af64a77a8c852c",
+                "sha256:73d785a950fc82dd2a25897d525d003f6378d1cb23ab305578394694202a58c3",
+                "sha256:8c8aaad94455178e3187ab22c8b01a3837f8ee50e09cf31f1ba129eb293ec30b",
+                "sha256:8ce678dbaf790dbdb3eba24056d5364fb45944f33553dd5869b7580cdbb83614",
+                "sha256:aaee9905aee35ba5905cfb3c62f3e83b3bec7b39413f0a7f19be4e547ea01ebb",
+                "sha256:bcd3b13b56ea479b3650b82cabd6b5343a625b0ced5429e4ccad28a8973f301b",
+                "sha256:c9e348e02e4d2b4a8b2eedb48210430658df6951fa484e59de33ff773fbd4b41",
+                "sha256:d205b1b46085271b4e15f670058ce182bd1199e56b317bf2ec004b6a44f911f6",
+                "sha256:d43943ef777f9a1c42bf4e552ba23ac77a6351de620aa9acf64ad54933ad4d34",
+                "sha256:d5d33e9e7af3b34a40dc05f498939f0ebf187f07c385fd58d591c533ad8562fe",
+                "sha256:fc0fea399acb12edbf8a628ba8d2312f583bdbdb3335635db062fa98cf71fca4",
+                "sha256:fe460b922ec15dd205595c9b5b99e2f056fd98ae8f9f56b888e7a17dc2b757e7"
+            ],
+            "version": "==1.4.1"
+        },
         "urlcanon": {
             "hashes": [
                 "sha256:30f5bf0e2e4a0feb6dd9ee139a4180a5d493117e8a1448569da3d73c18b92b62"
@@ -691,10 +789,10 @@
         },
         "wcwidth": {
             "hashes": [
-                "sha256:cafe2186b3c009a04067022ce1dcd79cb38d8d65ee4f4791b8888d6599d1bbe1",
-                "sha256:ee73862862a156bf77ff92b09034fc4825dd3af9cf81bc5b360668d425f3c5f1"
+                "sha256:79375666b9954d4a1a10739315816324c3e73110af9d0e102d906fdb0aec009f",
+                "sha256:8c6b5b6ee1360b842645f336d9e5d68c55817c26d3050f46b235ef2bc650e48f"
             ],
-            "version": "==0.1.9"
+            "version": "==0.2.4"
         },
         "werkzeug": {
             "hashes": [
@@ -707,10 +805,10 @@
     "develop": {
         "astroid": {
             "hashes": [
-                "sha256:4c17cea3e592c21b6e222f673868961bad77e1f985cb1694ed077475a89229c1",
-                "sha256:d8506842a3faf734b81599c8b98dcc423de863adcc1999248480b18bd31a0f38"
+                "sha256:2f4078c2a41bf377eea06d71c9d2ba4eb8f6b1af2135bec27bbbb7d8f12bb703",
+                "sha256:bc58d83eb610252fd8de6363e39d4f1d0619c894b0ed24603b881c02e64c7386"
             ],
-            "version": "==2.4.1"
+            "version": "==2.4.2"
         },
         "attrs": {
             "hashes": [
@@ -721,17 +819,17 @@
         },
         "backcall": {
             "hashes": [
-                "sha256:38ecd85be2c1e78f77fd91700c76e14667dc21e2713b63876c0eb901196e01e4",
-                "sha256:bbbf4b1e5cd2bdb08f915895b51081c041bac22394fdfcfdfbe9f14b77c08bf2"
+                "sha256:5cbdbf27be5e7cfadb448baf0aa95508f91f2bbc6c6437cd9cd06e2a4c215e1e",
+                "sha256:fbbce6a29f263178a1f7915c1940bde0ec2b2a967566fe1c65c1dfb7422bd255"
             ],
-            "version": "==0.1.0"
+            "version": "==0.2.0"
         },
         "certifi": {
             "hashes": [
-                "sha256:1d987a998c75633c40847cc966fcf5904906c920a7f17ef374f5aa4282abd304",
-                "sha256:51fcb31174be6e6664c5f69e3e1691a2d72a1a12e90f872cbdb1567eb47b6519"
+                "sha256:5ad7e9a056d25ffa5082862e36f119f7f7cec6457fa07ee2f8c339814b80c9b1",
+                "sha256:9cd41137dc19af6a5e03b630eefe7d1f458d964d406342dd3edf625839b944cc"
             ],
-            "version": "==2020.4.5.1"
+            "version": "==2020.4.5.2"
         },
         "chardet": {
             "hashes": [
@@ -783,6 +881,22 @@
             ],
             "version": "==4.4.2"
         },
+        "flake8": {
+            "hashes": [
+                "sha256:15e351d19611c887e482fb960eae4d44845013cc142d42896e9862f775d8cf5c",
+                "sha256:f04b9fcbac03b0a3e58c0ab3a0ecc462e023a9faf046d57794184028123aa208"
+            ],
+            "index": "ia",
+            "version": "==3.8.3"
+        },
+        "flake8-annotations": {
+            "hashes": [
+                "sha256:9091d920406a7ff10e401e0dd1baa396d1d7d2e3d101a9beecf815f5894ad554",
+                "sha256:f59fdceb8c8f380a20aed20e1ba8a57bde05935958166c52be2249f113f7ab75"
+            ],
+            "index": "ia",
+            "version": "==2.1.0"
+        },
         "idna": {
             "hashes": [
                 "sha256:2c6a5de3089009e3da7c5dde64a141dbc8551d5b7f6cf4ed7c2568d0cc520a8f",
@@ -790,21 +904,27 @@
             ],
             "version": "==2.6"
         },
+        "importlab": {
+            "hashes": [
+                "sha256:d855350d19dc10a17aabd2fe6f4b428ff1a936071f692fbf686a73694d26a51c"
+            ],
+            "version": "==0.5.1"
+        },
         "importlib-metadata": {
             "hashes": [
-                "sha256:2a688cbaa90e0cc587f1df48bdc97a6eadccdcd9c35fb3f976a09e3b5016d90f",
-                "sha256:34513a8a0c4962bc66d35b359558fd8a5e10cd472d37aec5f66858addef32c1e"
+                "sha256:0505dd08068cfec00f53a74a0ad927676d7757da81b7436a6eefe4c7cf75c545",
+                "sha256:15ec6c0fd909e893e3a08b3a7c76ecb149122fb14b7efe1199ddd4c7c57ea958"
             ],
             "markers": "python_version < '3.8'",
-            "version": "==1.6.0"
+            "version": "==1.6.1"
         },
         "ipython": {
             "hashes": [
-                "sha256:5b241b84bbf0eb085d43ae9d46adf38a13b45929ca7774a740990c2c242534bb",
-                "sha256:f0126781d0f959da852fb3089e170ed807388e986a8dd4e6ac44855845b0fb1c"
+                "sha256:0ef1433879816a960cd3ae1ae1dc82c64732ca75cec8dab5a4e29783fb571d0e",
+                "sha256:1b85d65632211bf5d3e6f1406f3393c8c429a47d7b947b9a87812aa5bce6595c"
             ],
             "index": "ia",
-            "version": "==7.14.0"
+            "version": "==7.15.0"
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@@ -862,30 +982,30 @@
         },
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         "mypy-extensions": {
             "hashes": [
@@ -894,6 +1014,29 @@
             ],
             "version": "==0.4.3"
         },
+        "networkx": {
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@@ -946,10 +1089,24 @@
         },
         "py": {
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-                "sha256:c20fdd83a5dbc0af9efd622bee9a5564e278f6380fffcacc43ba6f43db2813b0"
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+            "version": "==1.8.2"
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@@ -960,11 +1117,11 @@
         },
         "pylint": {
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-                "sha256:dd506acce0427e9e08fb87274bcaa953d38b50a58207170dbf5b36cf3e16957b"
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@@ -975,27 +1132,27 @@
         },
         "pytest": {
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-                "sha256:eb2b5e935f6a019317e455b6da83dd8650ac9ffd2ee73a7b657a30873d67a698"
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-            "version": "==2.9.0"
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-                "sha256:ce610831cedeff5331f4e2fc453a5dd65384303f680ab34bee2c6533855b431c"
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         "pytest-pylint": {
             "hashes": [
@@ -1012,6 +1169,29 @@
             "index": "ia",
             "version": "==0.7.3"
         },
+        "pytype": {
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@@ -1022,11 +1202,11 @@
         },
         "responses": {
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-            "version": "==0.10.14"
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@@ -1073,7 +1253,6 @@
                 "sha256:fc0fea399acb12edbf8a628ba8d2312f583bdbdb3335635db062fa98cf71fca4",
                 "sha256:fe460b922ec15dd205595c9b5b99e2f056fd98ae8f9f56b888e7a17dc2b757e7"
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             "version": "==1.4.1"
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@@ -1093,10 +1272,10 @@
         },
         "wcwidth": {
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