improve support to meili

http-api/app/meili.py

@@ -0,0 +1,62 @@
+import re
+
+OPERATORS = [
+    '!=',
+    '>=',
+    '<=',
+    '=',
+    '>',
+    '<',
+    'TO',
+    'EXISTS',
+    'IN',
+    'NOT IN',
+]
+
+
+def remove_quotes(value: str) -> str:
+    if (value.startswith('"') and value.endswith('"')) or (
+        value.startswith("'") and value.endswith("'")
+    ):
+        return value[1:-1]
+    return value
+
+
+def parse_condition(condition: str) -> dict[str, str] | None:
+    for op in OPERATORS:
+        parts = condition.split(op)
+
+        if len(parts) == 2:
+            attr, value = parts
+            attr = attr.strip()
+            value = remove_quotes(value.strip())
+
+            return {
+                'attr': attr,
+                'op': op,
+                'value': value,
+            }
+
+    return None
+
+
+def parse(s: str) -> list[dict]:
+    filter_expr = re.sub(r'\s+', ' ', s).strip()
+
+    if filter_expr == '':
+        return []
+
+    parts = re.split(r'\b(?:AND|OR)\b', filter_expr)
+    conditions = []
+
+    for part in parts:
+        condition = parse_condition(part.strip())
+
+        if condition:
+            conditions.append(condition)
+
+    return conditions
+
+
+def encode(conditions: list[dict]):
+    return ' AND '.join(f'{c["attr"]} {c["op"]} {c["value"]}' for c in conditions if c)