mirror of
https://github.com/Dispatcharr/Dispatcharr.git
synced 2026-07-18 17:16:26 +00:00
5940efbddf
- Added support for customizable title and description matching modes in series rules. - Implemented a preview feature for series rules to show matching upcoming programs. - Created a new SeriesRuleEditorModal for editing series rules with improved UI. - Refactored query parsing logic into reusable functions for better maintainability. - Updated API to handle new parameters for series rule creation and evaluation. - Enhanced the ProgramRecordingModal and SeriesRecordingModal to integrate the new rule editor. - Added pagination for program search results in the API.
137 lines
4.5 KiB
Python
137 lines
4.5 KiB
Python
"""Shared query parsing helpers for EPG program text search.
|
|
|
|
Used by the EPG search API and the DVR series rule evaluator to apply
|
|
the same boolean / quoted-phrase / regex / whole-word matching semantics.
|
|
|
|
Public API:
|
|
parse_text_query(field, raw_value, use_regex=False, whole_words=False) -> Q
|
|
"""
|
|
|
|
import re
|
|
|
|
from django.db.models import Q
|
|
|
|
|
|
def build_q_object(field_name, term, use_regex=False, whole_words=False):
|
|
"""Build a single Q object for one search term.
|
|
|
|
`whole_words` uses `\\y` on PostgreSQL and `\\b` everywhere else so the
|
|
pattern actually anchors on a word boundary regardless of backend.
|
|
"""
|
|
term = term.strip()
|
|
if not term:
|
|
return Q()
|
|
|
|
if use_regex:
|
|
return Q(**{f'{field_name}__iregex': term})
|
|
if whole_words:
|
|
from django.db import connection
|
|
boundary = r'\y' if connection.vendor == 'postgresql' else r'\b'
|
|
pattern = boundary + re.escape(term) + boundary
|
|
return Q(**{f'{field_name}__iregex': pattern})
|
|
return Q(**{f'{field_name}__icontains': term})
|
|
|
|
|
|
def parse_text_query(field_name, raw_value, use_regex=False, whole_words=False):
|
|
"""Parse a search expression into a Q object.
|
|
|
|
Supports:
|
|
- AND / OR (case-insensitive) between bare terms.
|
|
- Double-quoted phrases (atomic; never split on operators).
|
|
- Parenthetical grouping with arbitrary nesting.
|
|
- Regex mode (entire raw value is treated as a single regex).
|
|
- Whole-word mode (each bare term anchored with word boundaries).
|
|
|
|
A bare value with no operators is matched as a single phrase via
|
|
icontains (or regex / whole-word as configured).
|
|
"""
|
|
phrases = {}
|
|
|
|
def extract_quoted(text):
|
|
def replacer(m):
|
|
key = f'\x00P{len(phrases)}\x00'
|
|
phrases[key] = m.group(1)
|
|
return key
|
|
return re.sub(r'"([^"]*)"', replacer, text)
|
|
|
|
processed = extract_quoted(raw_value)
|
|
|
|
def build_q(token):
|
|
return build_q_object(field_name, phrases.get(token, token), use_regex, whole_words)
|
|
|
|
def parse_expression(expr):
|
|
expr = expr.strip()
|
|
|
|
if '(' in expr:
|
|
paren_start = expr.rfind('(')
|
|
paren_end = expr.find(')', paren_start)
|
|
if paren_end == -1:
|
|
return Q()
|
|
|
|
group_q = parse_expression(expr[paren_start + 1:paren_end])
|
|
|
|
before_str = expr[:paren_start].rstrip()
|
|
after_str = expr[paren_end + 1:].lstrip()
|
|
|
|
before_op = '&'
|
|
if before_str.upper().endswith(' AND'):
|
|
before_str = before_str[:-4].rstrip()
|
|
elif before_str.upper().endswith(' OR'):
|
|
before_str = before_str[:-3].rstrip()
|
|
before_op = '|'
|
|
|
|
after_op = '&'
|
|
after_upper = after_str.upper()
|
|
if after_upper.startswith('AND '):
|
|
after_str = after_str[4:].lstrip()
|
|
elif after_upper.startswith('OR '):
|
|
after_str = after_str[3:].lstrip()
|
|
after_op = '|'
|
|
|
|
result = group_q
|
|
if before_str:
|
|
before_q = parse_expression(before_str)
|
|
result = (before_q | result) if before_op == '|' else (before_q & result)
|
|
if after_str:
|
|
after_q = parse_expression(after_str)
|
|
result = (result | after_q) if after_op == '|' else (result & after_q)
|
|
return result
|
|
|
|
tokens = []
|
|
operators = []
|
|
remaining = expr
|
|
|
|
while remaining:
|
|
upper = remaining.upper()
|
|
and_pos = upper.find(' AND ')
|
|
or_pos = upper.find(' OR ')
|
|
|
|
if and_pos == -1 and or_pos == -1:
|
|
tokens.append(remaining.strip())
|
|
break
|
|
|
|
if and_pos == -1:
|
|
pos, op, op_len = or_pos, '|', 4
|
|
elif or_pos == -1:
|
|
pos, op, op_len = and_pos, '&', 5
|
|
elif and_pos < or_pos:
|
|
pos, op, op_len = and_pos, '&', 5
|
|
else:
|
|
pos, op, op_len = or_pos, '|', 4
|
|
|
|
token = remaining[:pos].strip()
|
|
if token:
|
|
tokens.append(token)
|
|
operators.append(op)
|
|
remaining = remaining[pos + op_len:]
|
|
|
|
if not tokens:
|
|
return Q()
|
|
|
|
result = build_q(tokens[0])
|
|
for i, op in enumerate(operators):
|
|
next_q = build_q(tokens[i + 1])
|
|
result = (result & next_q) if op == '&' else (result | next_q)
|
|
return result
|
|
|
|
return parse_expression(processed)
|