Fix - {diff} and {diff_full} notifications tokens were not always including the full output

changedetectionio/diff.py

@@ -2,22 +2,31 @@
 
 import difflib
 
+
+def same_slicer(l, a, b):
+    if a == b:
+        return [l[a]]
+    else:
+        return l[a:b]
+
 # like .compare but a little different output
 def customSequenceMatcher(before, after, include_equal=False):
     cruncher = difflib.SequenceMatcher(isjunk=lambda x: x in " \\t", a=before, b=after)
 
+    # @todo Line-by-line mode instead of buncghed, including `after` that is not in `before` (maybe unset?)
     for tag, alo, ahi, blo, bhi in cruncher.get_opcodes():
         if include_equal and tag == 'equal':
             g = before[alo:ahi]
             yield g
         elif tag == 'delete':
-            g = "(removed) {}".format(before[alo])
+            g = ["(removed) " + i for i in same_slicer(before, alo, ahi)]
             yield g
         elif tag == 'replace':
-            g = ["(changed) {}".format(before[alo]), "(-> into) {}".format(after[blo])]
+            g = ["(changed) " + i for i in same_slicer(before, alo, ahi)]
+            g += ["(into   ) " + i for i in same_slicer(after, blo, bhi)]
             yield g
         elif tag == 'insert':
-            g = "(added) {}".format(after[blo])
+            g = ["(added  ) " + i for i in same_slicer(after, blo, bhi)]
             yield g
 
 # only_differences - only return info about the differences, no context

changedetectionio/tests/test_notification.py

@@ -125,7 +125,7 @@ def test_check_notification(client, live_server):
     # Diff was correctly executed
     assert "Diff Full: Some initial text" in notification_submission
     assert "Diff: (changed) Which is across multiple lines" in notification_submission
-    assert "(-> into) which has this one new line" in notification_submission
+    assert "(into   ) which has this one new line" in notification_submission
 
 
     if env_base_url:

changedetectionio/tests/unit/test-content/after-2.txt

@@ -0,0 +1,3 @@
+After twenty years, as cursed as I may be
+ok
+and insure that I'm one of those computer nerds.

changedetectionio/tests/unit/test-content/after.txt

@@ -2,5 +2,6 @@ After twenty years, as cursed as I may be
 for having learned computerese,
 I continue to examine bits, bytes and words
 xok
+next-x-ok
 and insure that I'm one of those computer nerds.
 and something new

changedetectionio/tests/unit/test_notification_diff.py

@@ -12,12 +12,19 @@ from changedetectionio import diff
 class TestDiffBuilder(unittest.TestCase):
 
     def test_expected_diff_output(self):
-        base_dir=os.path.dirname(__file__)
+        base_dir = os.path.dirname(__file__)
-        output = diff.render_diff(base_dir+"/test-content/before.txt", base_dir+"/test-content/after.txt")
+        output = diff.render_diff(previous_file=base_dir + "/test-content/before.txt", newest_file=base_dir + "/test-content/after.txt")
         output = output.split("\n")
-        self.assertIn("(changed) ok", output)
+        self.assertIn('(changed) ok', output)
-        self.assertIn("(-> into) xok", output)
+        self.assertIn('(into   ) xok', output)
-        self.assertIn("(added) and something new", output)
+        self.assertIn('(into   ) next-x-ok', output)
+        self.assertIn('(added  ) and something new', output)
+
+
+        output = diff.render_diff(previous_file=base_dir + "/test-content/before.txt", newest_file=base_dir + "/test-content/after-2.txt")
+        output = output.split("\n")
+        self.assertIn('(removed) for having learned computerese,', output)
+        self.assertIn('(removed) I continue to examine bits, bytes and words', output)
 
         # @todo test blocks of changed, blocks of added, blocks of removed
 

requirements.txt

@@ -35,3 +35,8 @@ lxml
 # 3.141 was missing socksVersion, 3.150 was not in pypi, so we try 4.1.0
 selenium ~= 4.1.0
 
+# https://stackoverflow.com/questions/71652965/importerror-cannot-import-name-safe-str-cmp-from-werkzeug-security/71653849#71653849
+# ImportError: cannot import name 'safe_str_cmp' from 'werkzeug.security'
+# need to revisit flask login versions
+werkzeug ~= 2.0.0
+