1 files changed, 105 insertions, 0 deletions
diff --git a/utils/acc_regex.py b/utils/acc_regex.py
new file mode 100644
index 0000000..1c85def
--- /dev/null
+++ b/utils/acc_regex.py
@@ -0,0 +1,105 @@
+from typing import List
+from utils.read_file import entry
+from utils.register import complete_prices
+import re
+
+RE_NOT = r'not ((?:[^()\s]+)|(?:\(.+\)))'
+RE_AND = r'((?:[^()\s]+)|(?:\(.+\))) and ((?:[^()\s]+)|(?:\(.+\)))'
+RE_OR = r'((?:[^()\s]+)|(?:\(.+\))) or ((?:[^()\s]+)|(?:\(.+\)))'
+
+
+def clean_pattern(pattern: str):
+    pattern = pattern.strip()
+
+    if pattern[0] == '(' and pattern[-1] == ')':
+        pattern = pattern[1:-1]
+
+    return pattern
+
+
+def create_ors(string: str):
+    splitted = string.split()
+    result = ''
+
+    for left, right in zip(splitted[:-1], splitted[1:]):
+        if left not in ['not', 'and', 'or'] and right not in ['and', 'or']:
+            result += f'{left} or '
+        else:
+            result += f'{left} '
+
+    result += splitted[-1]
+
+    return result
+
+
+def find_logic_patt(pattern: str):
+    # First search for the pattern "not {text}"
+    patt = re.findall(RE_NOT, pattern)
+    if patt:
+        return ('not', patt[0])
+
+    # If there wasn't a "not" pattern, try searching for "{text 1} or {text 2}"
+    patt = re.findall(RE_OR, pattern)
+    if patt:
+        return ('or', patt[0])
+
+    # Lastly, try searching for "{text 1} and {text 2}" pattern.
+    patt = re.findall(RE_AND, pattern)
+    if patt:
+        return ('and', patt[0])
+
+    # If there wasn't any pattern, return None.
+    return (None, None)
+
+
+def re_ledger(pattern: str, account_name: str):
+    pattern = clean_pattern(pattern)
+
+    if ' ' not in pattern:
+        if pattern == '{False}':
+            return False
+        elif pattern == '{True}':
+            return True
+        elif re.search(pattern, account_name) is None:
+            return False
+        else:
+            return True
+        
+    pattern = create_ors(pattern)
+    key, patt = find_logic_patt(pattern)
+
+    while key is not None:
+        if key == 'not':
+            meets_criteria = not re_ledger(patt, account_name)
+            pattern = pattern.replace(f'not {patt}', f'{{{meets_criteria}}}')
+
+        elif key == 'or':
+            meets_criteria = re_ledger(patt[0], account_name) or re_ledger(patt[1], account_name)
+            pattern = pattern.replace(f'{patt[0]} or {patt[1]}', f'{{{meets_criteria}}}')
+
+        elif key == 'and':
+            meets_criteria = re_ledger(patt[0], account_name) and re_ledger(patt[1], account_name)
+            pattern = pattern.replace(f'{patt[0]} and {patt[1]}', f'{{{meets_criteria}}}')
+
+
+        key, patt = find_logic_patt(pattern)
+
+    return re_ledger(pattern, account_name)
+
+
+def filter_accounts(arguments: List[str], my_entries: List[entry]):
+    pattern = ' '.join(arguments)
+    result = []
+
+    for ent in my_entries:
+        complete_prices(ent)
+
+        for trans in ent.transactions:
+            if re_ledger(pattern, trans[0]):
+                result.append(entry(
+                    date=ent.date.strftime('%Y-%m-%d'),
+                    comment=ent.comment,
+                    transactions=[[trans[0], str(trans[1])]]
+                ))
+
+    return result