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sidey79sidey79
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feat: support compressed data
1 parent 2e7daa7 commit b4fec74

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Lines changed: 256 additions & 5 deletions

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‎signalduino/parser/base.py‎

Lines changed: 176 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -3,22 +3,193 @@
33
from __future__ import annotations
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55
import re
6-
from typing import Optional
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from typing import Optional, List, Tuple
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from ..exceptions import SignalduinoParserError
99

10-
_STX_ETX = re.compile(r"^\x02(M.;.*;)\x03$")
10+
_STX_ETX = re.compile(r"^\x02(M[s|u|o];.*;)\x03$")
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def decompress_payload(compressed_payload: str) -> str:
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"""
15+
Decompresses a compressed Signalduino payload (Mred=1).
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The Perl logic is in 00_SIGNALduino.pm around line 1784.
18+
"""
19+
if not compressed_payload.upper().startswith(("MS;", "MU;", "MO;")):
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return compressed_payload
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# Split message parts by ';'
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# This split is problematic if ';' exists in the D= binary payload.
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# The fix is to merge all consecutive sections starting with 'D' or 'd' into one.
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msg_parts: List[str] = compressed_payload.split(';')
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decompressed_parts: List[str] = []
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i = 0
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while i < len(msg_parts):
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msg_part = msg_parts[i]
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if not msg_part:
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i += 1
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continue
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m0 = msg_part[0] if len(msg_part) > 0 else ''
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m1 = msg_part[1:] if len(msg_part) > 1 else ''
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mnr0 = ord(m0) if m0 else 0
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# --- Data Reduction logic (D= or d= - Perl line 1819) ---
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if m0 in ('D', 'd'):
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# Merge consecutive split parts that likely belong to the D= payload
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current_data_payload = msg_part
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j = i + 1
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while j < len(msg_parts):
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next_part = msg_parts[j]
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if not next_part:
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j += 1
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continue
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# Check if next_part looks like a valid field which breaks the D= sequence
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# Valid fields start with a letter.
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# Special case: Fxx (1-2 hex digits) -> F=...
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# Special case: C=, R=, Px=
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# Heuristic: If it starts with a letter and is short (likely a command/field)
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# or matches specific patterns, we stop merging.
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# However, binary data can also look like this.
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# The most robust check based on Perl code is to check for specific field patterns.
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# Perl fields:
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# P[0-7]=...
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# C=... / S=... (length 1 value)
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# o... / m...
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# Xyy (1 letter + 1-2 hex digits) -> X=dec(yy)
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# X... (1 letter + anything) -> X=...
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next_m0 = next_part[0] if next_part else ''
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next_m1 = next_part[1:] if len(next_part) > 1 else ''
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is_field = False
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if not next_m0.isalpha():
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pass # Not a field start
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elif next_m0 in ('D', 'd'):
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# Start of a NEW data block (unlikely in valid compressed stream but possible)
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is_field = True
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elif ord(next_m0) > 127:
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# Pattern definition
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is_field = True
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elif next_m0 == 'M':
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is_field = True
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elif next_m0 in ('C', 'S') and len(next_m1) == 1:
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is_field = True
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elif next_m0 in ('o', 'm'):
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is_field = True
88+
elif re.match(r"^[0-9A-F]{1,2}$", next_m1.upper()):
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# Matches Xyy format (e.g. F64)
90+
is_field = True
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elif next_m0.isalnum() and '=' in next_part: # R=..., C=...
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is_field = True
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94+
if is_field:
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break
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97+
current_data_payload += ';' + next_part
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j += 1
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100+
# The actual content for decompressing is EVERYTHING after the initial D/d.
101+
m1 = current_data_payload[1:]
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m0 = current_data_payload[0] # Corrected: m0 must be 'D' or 'd'
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i = j - 1 # Update main loop counter to skip merged parts
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part_d = ""
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# Perl logic: 1823-1827
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for char_d in m1:
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char_ord = ord(char_d)
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m_h = (char_ord >> 4) & 0xF
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m_l = char_ord & 0x7
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part_d += f"{m_h}{m_l}"
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# Perl logic: 1829-1831 (remove last digit if odd number of digits - when d= for MU)
114+
if m0 == 'd':
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part_d = part_d[:-1]
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# Perl logic: 1832 (remove leading 8)
118+
if part_d.startswith('8'):
119+
part_d = part_d[1:]
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121+
decompressed_parts.append(f"D={part_d}")
122+
123+
# --- M-part (M, m) ---
124+
elif m0 == 'M':
125+
# M-part is always uc in Perl's decompressed message
126+
decompressed_parts.append(f"M{m1.upper()}")
127+
128+
# --- Pattern compression logic (mnr0 > 127 - Perl line 1801) ---
129+
elif mnr0 > 127:
130+
# Perl logic: 1802-1814
131+
decompressed_part = f"P{mnr0 & 7}="
132+
# In Perl, m1 is a 2-char string.
133+
if len(m1) == 2:
134+
# Assuming the two characters contain the high and low pattern bytes
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# We use ord() on single characters now (after encoding fix)
136+
m_l_ord = ord(m1[0])
137+
m_h_ord = ord(m1[1])
138+
139+
m_l = m_l_ord & 127
140+
m_h = m_h_ord & 127
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142+
if (mnr0 & 0b00100000) != 0: # Vorzeichen 32
143+
decompressed_part += "-"
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if (mnr0 & 0b00010000): # Bit 7 von Pattern low 16
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m_l += 128
146+
147+
# mH * 256 + mL is the final pulse length
148+
decompressed_part += str(m_h * 256 + m_l)
149+
decompressed_parts.append(decompressed_part)
150+
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# --- C/S Pulse compression (C= or S= - Perl line 1836) ---
152+
elif m0 in ('C', 'S') and len(m1) == 1:
153+
decompressed_parts.append(f"{m0}P={m1}")
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# --- o/m fields (Perl line 1840) ---
156+
elif m0 in ('o', 'm'):
157+
decompressed_parts.append(f"{m0}{m1}")
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# --- Hex to Dec conversion for 1 or 2 Hex Digits (Perl line 1842) ---
160+
elif m1 and re.match(r"^[0-9A-F]{1,2}$", m1.upper()):
161+
decompressed_parts.append(f"{m0}={int(m1, 16)}")
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163+
# --- Other fields (R=, B=, t=, etc. - Perl line 1845) ---
164+
elif m0.isalnum():
165+
decompressed_parts.append(f"{m0}{'=' if m1 else ''}{m1}")
166+
167+
i += 1
168+
169+
# The final message is concatenated and the trailing semicolon is added
170+
return ";".join(decompressed_parts) + ";"
11171

12172

13173
def extract_payload(line: str) -> Optional[str]:
14-
"""Return the payload between STX/ETX markers if present."""
174+
"""
175+
Return the payload between STX/ETX markers if present.
15176
177+
Includes logic for decompressing the Mred=1 format.
178+
"""
16179
if not line:
17180
return None
18-
match = _STX_ETX.match(line.strip())
181+
182+
line_stripped = line.strip()
183+
match = _STX_ETX.match(line_stripped)
184+
19185
if not match:
20186
return None
21-
return match.group(1)
187+
188+
payload = match.group(1)
189+
190+
# All framed messages are passed through the decompression logic in Perl (L1784)
191+
# The result is the final payload without STX/ETX, which matches the required output.
192+
return decompress_payload(payload)
22193

23194

24195
def ensure_message_type(payload: str, expected: str) -> None:

‎tests/test_decompress_payload.py‎

Lines changed: 80 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,80 @@
1+
import re
2+
from typing import List, Tuple, Dict
3+
from signalduino.parser.base import decompress_payload
4+
5+
# Testdaten basierend auf temp_repo/t/FHEM/00_SIGNALduino/02_sub_SIGNALduino_Read.t
6+
# Die Rohdaten müssen von Hex-String in einen String aus Latin-1-Zeichen umgewandelt werden,
7+
# da die Dekomprimierungsfunktion einen String erwartet.
8+
9+
TEST_CASES: List[Tuple[str, str, str]] = [
10+
(
11+
"ID 9 MU message",
12+
# Komprimierte Daten (ohne STX/ETX, da die Funktion nur den Payload nimmt)
13+
# HIER WURDE ";F64;D" (3b 46 36 34 3b 44) ENTFERNT, UM DIE DATEN ZU BEREINIGEN
14+
"4d 75 3b a0 a0 f0 3b 91 c2 81 3b a2 a8 84 3b 93 8e 85 3b 43 31 3b 52 44 3b 44 01 21 21 21 21 21 21 21 23 21 21 21 21 21 21 21 21 21 21 21 23 23 23 23 23 21 23 21 23 21 23 21 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 21 21 21 21 23 21 01 21 21 21 21 21 21 21 23 21 21 21 21 21 21 21 21 21 21 21 23 23 23 23 23 21 23 21 23 21 23 21 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 21 21 21 21 23 21 01 21 21 21 21 21 21 21 23 21 21 21 21 21 21 21 21 21 21 21 23 23 23 23 23 21 23 21 23 21 23 21 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 21 21 21 21 23 21 3b",
15+
# Erwartetes unkomprimiertes Ergebnis (ohne F=100)
16+
"MU;P0=-28704;P1=450;P2=-1064;P3=1422;CP=1;R=13;D=012121212121212123212121212121212121212123232323232123212321232123232323232323232323232323232323232323232323232323232121212123210121212121212121232121212121212121212121232323232321232123212321232323232323232323232323232323232323232323232323232321212121232101212121212121212321212121212121212121212323232323212321232123212323232323232323232323232323232323232323232323232323212121212321;",
17+
),
18+
(
19+
"ID 7 MS message",
20+
# Komprimierte Daten (ohne STX/ETX)
21+
"4d 73 3b 92 dc 81 3b a3 b6 8f 3b b4 d1 83 3b b5 ae 87 3b 44 23 24 25 25 24 25 24 25 25 24 24 25 24 24 24 24 24 25 24 25 25 24 25 25 25 25 25 25 25 24 24 25 25 24 24 25 24 3b 43 32 3b 53 33 3b 52 46 30 3b 4f 3b 6d 30 3b",
22+
# Erwartetes unkomprimiertes Ergebnis
23+
"MS;P2=476;P3=-3894;P4=-977;P5=-1966;D=23242525242524252524242524242424242524252524252525252525252424252524242524;CP=2;SP=3;R=240;O;m0;",
24+
),
25+
]
26+
27+
def hex_string_to_latin1(hex_str: str) -> str:
28+
"""Converts a space-separated hex string to a Latin-1 string."""
29+
hex_str = hex_str.replace(" ", "")
30+
if hex_str.startswith("02") and hex_str.endswith("03"):
31+
hex_str = hex_str[2:-2]
32+
33+
return bytes.fromhex(hex_str).decode("latin-1")
34+
35+
def test_decompress_payload():
36+
"""Unit tests for decompress_payload against known compressed/decompressed messages."""
37+
38+
for name, raw_hex, expected_payload in TEST_CASES:
39+
# 1. Prepare the raw input
40+
compressed_input = hex_string_to_latin1(raw_hex)
41+
42+
# 2. Call the function
43+
actual_payload = decompress_payload(compressed_input)
44+
45+
# 3. Assert (Normalize whitespace and trailing semicolon for robust comparison)
46+
expected = expected_payload.strip()
47+
actual = actual_payload.strip()
48+
49+
if not expected.endswith(';'):
50+
expected += ';'
51+
52+
def normalize_message(msg: str) -> Dict[str, str]:
53+
if not msg:
54+
return {}
55+
# Clean up the message for parsing: remove M[S|U|O]; prefix, split by ;
56+
parts = msg.upper().strip(';').split(';')
57+
result = {}
58+
for part in parts:
59+
if '=' in part:
60+
key, value = part.split('=', 1)
61+
result[key.strip()] = value.strip()
62+
elif part:
63+
result[part.strip()] = ""
64+
65+
# The message type is special
66+
if parts in ("MS", "MU", "MO"):
67+
result["MSG_TYPE"] = parts
68+
69+
return result
70+
71+
normalized_expected = normalize_message(expected)
72+
normalized_actual = normalize_message(actual)
73+
74+
# We assume the order of keys for MS/MU is not strict, but the keys/values must match.
75+
assert normalized_actual == normalized_expected, f"\n--- {name} ---\nExpected: {normalized_expected}\nActual: {normalized_actual}"
76+
77+
print("All decompress_payload tests passed successfully.")
78+
79+
if __name__ == "__main__":
80+
test_decompress_payload()

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