add validator functions and tests

Dockerfile

@@ -8,7 +8,7 @@ COPY . /git/
 RUN find . -type d -name .git -exec git describe --always --dirty > /git-version.txt \;
 
 
-FROM python:3.13
+FROM python:3.8
 
 EXPOSE 8080
 

renovate.json

@@ -1,3 +0,0 @@
-{
-  "$schema": "https://docs.renovatebot.com/renovate-schema.json"
-}

requirements.txt

@@ -1,4 +1,4 @@
-tornado==6.4.1
-isodate==0.7.2
-pytest==8.3.3
-GitPython==3.1.43
+tornado==6.0.4
+isodate==0.6.0
+pytest==5.4.1
+GitPython==3.1.12

validators/test_validators.py

@@ -0,0 +1,37 @@
+from validators import mandatory, empty, iso_date, valid_iban, valid_bic
+
+
+def test_mandatory():
+    assert mandatory("Foo") == True
+    assert mandatory("Foo Bar") == True
+    assert mandatory("1970-01-01") == True
+    assert mandatory("") == False
+
+
+def test_empty():
+    assert empty("") == True
+    assert empty(" ") == False
+    assert empty("Foo") == False
+    assert empty("1970-01-01") == False
+
+
+def test_iso_date():
+    assert iso_date("1970-01-01") == True
+    assert iso_date("1970-1-1") == True
+    assert iso_date("70-01-01") == False
+    assert iso_date("1970/01/01") == False
+    assert iso_date("1.1.1970") == False
+    assert iso_date("01.01.1970") == False
+
+
+def test_valid_iban():
+    assert valid_iban("DE89 3704 0044 0532 0130 00") == True
+    assert valid_iban("DX89 3704 0044 0532 0130 00") == False
+    assert valid_iban("DE99 3704 0044 0532 0130 00") == False
+
+
+def test_valid_bic():
+    assert valid_bic("PBNKDEFFXXX") == True
+    assert valid_bic("PBNKDXFFXXX") == False
+    assert valid_bic("PBNKDXFFXXXX") == False
+    assert valid_bic("PBN1DXFFXXX") == False

validators/validators.py

@@ -0,0 +1,34 @@
+import datetime
+from schwifty import IBAN, BIC
+
+
+def mandatory(field: str) -> bool:
+    return bool(field)
+
+
+def empty(field: str) -> bool:
+    return not bool(field)
+
+
+def iso_date(field: str) -> bool:
+    try:
+        datetime.datetime.strptime(field, "%Y-%m-%d")
+        return True
+    except ValueError:
+        return False
+
+
+def valid_iban(field: str) -> bool:
+    try:
+        IBAN(field)
+        return True
+    except ValueError:
+        return False
+
+
+def valid_bic(field: str) -> bool:
+    try:
+        BIC(field)
+        return True
+    except ValueError:
+        return False