From 395bbc5b113722e348ec7f41cff2765f83e7a03a Mon Sep 17 00:00:00 2001
From: Bryan Newbold <bnewbold@robocracy.org>
Date: Mon, 23 Apr 2018 13:00:03 -0700
Subject: work merge helper

---
 fatcat/sql.py             | 37 ++++++++++++++++++++++
 tests/entity_lifecycle.py | 80 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 117 insertions(+)
 create mode 100644 tests/entity_lifecycle.py

diff --git a/fatcat/sql.py b/fatcat/sql.py
index 43b2c2aa..e12757a8 100644
--- a/fatcat/sql.py
+++ b/fatcat/sql.py
@@ -3,7 +3,9 @@ import json
 import time
 import random
 import hashlib
+from sqlalchemy.orm.session import make_transient
 from fatcat import db
+import fatcat.api
 from fatcat.models import *
 
 def populate_db():
@@ -113,3 +115,38 @@ def accept_editgroup(eg):
     db.session.add(eg.editor)
 
     db.session.commit()
+
+def merge_works(left_id, right_id, edit_group=None):
+    """Helper to merge two works together."""
+    left = WorkIdent.query.filter(WorkIdent.id == left_id).first_or_404()
+    right = WorkIdent.query.filter(WorkIdent.id == right_id).first_or_404()
+    assert left.is_live and right.is_live
+    assert left.rev and right.rev
+    assert (left.redirect_id == None) and (right.redirect_id == None)
+
+    if edit_group is None:
+        edit_group = fatcat.api.get_or_create_edit_group()
+
+    releases = ReleaseIdent.query\
+        .join(ReleaseIdent.rev)\
+        .filter(ReleaseRev.work_ident_id == right_id)\
+        .filter(ReleaseIdent.is_live == True)\
+        .all()
+
+    # update all right releases to point to left
+    for release_ident in releases:
+        rev = release_ident.rev
+        old_id = rev.id
+        db.session.expunge(rev)
+        make_transient(rev)
+        rev.id = None
+        rev.parent = old_id
+        rev.work_ident_id = left.id
+        re = ReleaseEdit(edit_group=edit_group, ident=release_ident, rev=rev)
+        db.session.add_all([rev, re])
+
+    # redirect right id to left (via edit_group)
+    neww = WorkEdit(edit_group=edit_group, ident=right,
+        rev=left.rev, redirect_id=left.id)
+
+    db.session.add_all([neww])
diff --git a/tests/entity_lifecycle.py b/tests/entity_lifecycle.py
new file mode 100644
index 00000000..9f5b4040
--- /dev/null
+++ b/tests/entity_lifecycle.py
@@ -0,0 +1,80 @@
+
+import json
+import pytest
+import unittest
+import tempfile
+import fatcat
+import fatcat.sql
+from fatcat.models import *
+from fixtures import *
+
+
+def test_merge_works(app):
+
+    # two works, each with releases
+    rv = app.post('/v0/work',
+        data=json.dumps(dict()),
+        headers={"content-type": "application/json"})
+    workA_id = json.loads(rv.data.decode('utf-8'))['id']
+
+    rv = app.post('/v0/work',
+        data=json.dumps(dict()),
+        headers={"content-type": "application/json"})
+    workB_id = json.loads(rv.data.decode('utf-8'))['id']
+
+    rv = app.post('/v0/release',
+        data=json.dumps(dict(
+            title="some release",
+            work_type="journal-article",
+            work=workA_id,
+            doi="10.1234/A1")),
+        headers={"content-type": "application/json"})
+    releaseA1 = json.loads(rv.data.decode('utf-8'))['id']
+
+    rv = app.post('/v0/release',
+        data=json.dumps(dict(
+            title="some release",
+            work_type="journal-article",
+            work=workB_id,
+            doi="10.1234/B1")),
+        headers={"content-type": "application/json"})
+    releaseB1 = json.loads(rv.data.decode('utf-8'))['id']
+
+    rv = app.post('/v0/release',
+        data=json.dumps(dict(
+            title="some release",
+            work_type="journal-article",
+            work=workB_id,
+            doi="10.1234/A1")),
+        headers={"content-type": "application/json"})
+    releaseB2 = json.loads(rv.data.decode('utf-8'))['id']
+
+    # XXX: what if workB primary was set?
+
+    editgroup_id = 1
+    rv = app.post('/v0/editgroup/{}/accept'.format(editgroup_id),
+        headers={"content-type": "application/json"})
+    assert rv.status_code == 200
+    assert ChangelogEntry.query.count() == 1
+    assert WorkIdent.query.filter(WorkIdent.is_live==True).count() == 2
+    assert ReleaseIdent.query.filter(ReleaseIdent.is_live==True).count() == 3
+
+    # merge works
+    fatcat.sql.merge_works(workA_id, workB_id)
+    editgroup_id = 2
+    rv = app.post('/v0/editgroup/{}/accept'.format(editgroup_id),
+        headers={"content-type": "application/json"})
+    assert rv.status_code == 200
+
+    # check results
+    assert ChangelogEntry.query.count() == 2
+    assert WorkIdent.query.filter(WorkIdent.is_live==True).count() == 2
+    assert ReleaseIdent.query.filter(ReleaseIdent.is_live==True).count() == 3
+
+    workA_json = json.loads(app.get('/v0/work/{}'.format(workA_id)).data.decode('utf-8'))
+    workB_json = json.loads(app.get('/v0/work/{}'.format(workB_id)).data.decode('utf-8'))
+    assert workA_json['rev'] == workB_json['rev']
+    print(workA_json)
+    print(workB_json)
+    assert workA_json['redirect_id'] == None
+    assert workB_json['redirect_id'] == workA_json['id']
-- 
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