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ChuckBuildsandClaude Opus 5
e450a6dfb6
Review flagged this as critical and it is: the composer builds manager.py
by interpolating payload values into source text, /api/install writes
that file into plugins_dir, and the plugin loader imports and executes
it. The ast.parse check further down rejects only *invalid* syntax, and
an injected `import os` is perfectly valid.
Confirmed against the code before this commit. A plugin name carrying a
triple quote closes the module docstring and everything after it becomes
module-level code:
generated manager.py parses: True
injected module-level statements: ['import os', 'PWNED = os.getuid()']
and a geometry value is interpolated verbatim, because the parameter is
annotated int but arrives as JSON:
_compute_pos_expr('0 or __import__("os").system("id")', 'right', 'width')
-> 'width - 0 or __import__("os").system("id")'
generated source: x=0 or __import__("os").system("id"),
Three fixes. _safe_int coerces and optionally clamps, and
_compute_pos_expr applies it to its own argument -- which covers all
twenty-odd call sites at once rather than patching each. _rgb_expr does
the same for the eight colour interpolations, clamping channels to
0-255. Line endpoints and widths go through it too.
For the docstring, _reject_source_breaking refuses a plugin name
containing a quote, backslash or newline. Rejecting rather than escaping:
these are display names, none of that belongs in one, and a clear "Plugin
name cannot contain a double quote." beats silently mangling what the
user typed.
Verified: all three exploits now refused or neutered, and each defence
mutation-checked separately --
coercion removed in _compute_pos_expr -> 8 failed
docstring guard removed -> 5 failed
colour channels interpolated raw -> 13 failed
87 tests, covering seven expression payloads across seven geometry
fields and three colour channels, five literal-breaking names, and the
clean case asserting a normal payload still yields no module-level
statements at all.
One aside: the first version of this test file put the exploit string
in its own module docstring, which closed it and made the file a syntax
error -- the same bug, one level up. It now describes the payload rather
than embedding it.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01STMbQE4YctTacQXfbYqKuW
987 lines
41 KiB
Python
987 lines
41 KiB
Python
"""
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Plugin Composer blueprint — drag-and-drop plugin builder for LEDMatrix.
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Routes:
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GET /composer/ — Composer page
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POST /composer/api/generate — Generate and return plugin ZIP
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POST /composer/api/install — Write plugin directly to plugins_dir
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GET /composer/api/fonts/<name> — Serve TTF font files for canvas rendering
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GET /composer/api/validate-id/<id> — Check if a plugin ID is already taken
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"""
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import ast
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import io
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import json
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import logging
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import os
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import re
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from typing import Optional
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import zipfile
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from datetime import datetime
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from pathlib import Path
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import jinja2
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import jsonschema
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from flask import Blueprint, jsonify, render_template, request, send_file
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from werkzeug.utils import secure_filename
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logger = logging.getLogger(__name__)
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composer_bp = Blueprint('composer', __name__)
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# Module-level attributes injected by app.py at registration time
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composer_bp.config_manager = None
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composer_bp.plugin_manager = None
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composer_bp.plugins_dir = None
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composer_bp.project_root = None
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# Fonts safe to serve to the browser for canvas rendering
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_ALLOWED_FONTS = frozenset({'PressStart2P-Regular.ttf', '4x6-font.ttf', '5by7.regular.ttf'})
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# Map composer font keys → DisplayManager attribute names
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_FONT_ATTR_MAP = {
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'press_start': 'regular_font',
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'four_by_six': 'extra_small_font',
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'five_by_seven': 'bdf_5x7_font',
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}
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# Font sizes in LED pixels (used to compute second-line Y offsets)
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_FONT_SIZE_MAP = {
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'press_start': 8,
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'four_by_six': 6,
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'five_by_seven': 7,
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}
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_PLUGIN_ID_RE = re.compile(r'\A[a-z][a-z0-9-]{0,62}\Z')
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#: \Z, not $. Python's $ also matches just before a trailing newline,
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#: so '$' would accept "myplugin\\n" and create a directory whose name
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#: ends in one. Not traversal, but not a name anything should have to
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#: handle either.
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_PYTHON_IDENT_RE = re.compile(r'^[a-zA-Z_][a-zA-Z0-9_]*$')
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# ── Jinja2 environment (separate from Flask's; autoescape=False for code gen) ──
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_jinja_env: jinja2.Environment | None = None
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def _get_jinja_env() -> jinja2.Environment:
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global _jinja_env
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if _jinja_env is None:
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template_dir = Path(__file__).parent.parent / 'templates' / 'v3' / 'composer'
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_jinja_env = jinja2.Environment(
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loader=jinja2.FileSystemLoader(str(template_dir)),
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autoescape=False,
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trim_blocks=True,
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lstrip_blocks=True,
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)
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_jinja_env.filters['as_rgb'] = _as_rgb_filter
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_jinja_env.filters['as_fill'] = _as_fill_filter
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return _jinja_env
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def _as_rgb_filter(val) -> str:
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"""[r, g, b] → '(r, g, b)'"""
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if val is None:
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return 'None'
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return f'({int(val[0])}, {int(val[1])}, {int(val[2])})'
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def _as_fill_filter(val) -> str:
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"""[r, g, b] or None → '(r, g, b)' or 'None'"""
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if val is None:
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return 'None'
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return _as_rgb_filter(val)
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# ── Helper functions ──────────────────────────────────────────────────────────
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def _to_class_name(name: str) -> str:
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"""'My Clock' → 'MyClockPlugin' (avoids double-suffix if name already ends with Plugin)"""
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words = re.sub(r'[^a-zA-Z0-9]', ' ', name).split()
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base = ''.join(w.capitalize() for w in words)
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return base if base.endswith('Plugin') else base + 'Plugin'
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def _reject_source_breaking(value: str, field: str) -> None:
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"""Refuse text that could terminate a string literal in generated source.
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Anything interpolated into manager.py inside quotes has to survive being
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read back as Python. A quote, a backslash or a newline can end the literal
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early and turn the remainder into executable statements.
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"""
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for bad, label in (('"', 'a double quote'), ("'", 'a single quote'),
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('\\', 'a backslash'), ('\n', 'a newline'),
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('\r', 'a carriage return')):
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if bad in value:
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raise ComposerInputError(
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f'{field} cannot contain {label}.')
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def _safe_int(value, default: int = 0, lo: int | None = None,
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hi: int | None = None) -> int:
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"""Coerce a payload value to int, falling back rather than raising.
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Everything this module interpolates into generated Python has to go
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through here first. The payload is JSON from the browser, so a field
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annotated `int` can arrive as any string, and these values are formatted
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straight into `manager.py` -- which /api/install writes to disk and the
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plugin loader then imports and executes. An x of
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'0 or __import__("os").system("id")'
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produced `x=0 or __import__("os").system("id")` in the generated source,
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which is valid Python and so passed the ast.parse check.
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"""
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try:
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out = int(value)
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except (TypeError, ValueError):
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return default
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if lo is not None:
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out = max(lo, out)
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if hi is not None:
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out = min(hi, out)
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return out
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def _rgb_expr(el: dict, dr: int = 255, dg: int = 255, db: int = 255) -> str:
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"""A colour tuple literal built from coerced, clamped channel values."""
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return (f"({_safe_int(el.get('r'), dr, 0, 255)}, "
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f"{_safe_int(el.get('g'), dg, 0, 255)}, "
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f"{_safe_int(el.get('b'), db, 0, 255)})")
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def _compute_pos_expr(val, anchor: str | None, dim_var: str) -> str:
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"""Produce a Python expression string for an anchored or fixed position.
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anchor=None/'left'/'top' → fixed pixel value
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anchor='center' → dim_var // 2 ± offset
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anchor='right'/'bottom' → dim_var - offset
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"""
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val = _safe_int(val, 0)
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if not anchor or anchor in ('left', 'top'):
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return str(val)
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if anchor in ('center', 'middle'):
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if val == 0:
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return f"{dim_var} // 2"
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return f"{dim_var} // 2 + {val}" if val > 0 else f"{dim_var} // 2 - {abs(val)}"
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if anchor in ('right', 'bottom'):
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return dim_var if val == 0 else f"{dim_var} - {val}"
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return str(val)
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# Character widths in LED pixels per font (for text-alignment x offset math)
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_FONT_CHAR_W = {
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'press_start': 8,
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'four_by_six': 4,
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'five_by_seven': 5,
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}
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def _aligned_x_expr(x_base_expr: str, text_align: str, char_count: int, char_w: int) -> str:
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"""Return Python x expression for text alignment.
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left → x_base_expr (no change)
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center → x_base_expr - half_text_width
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right → x_base_expr - text_width
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"""
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if text_align == 'left' or not text_align:
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return x_base_expr
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text_px = char_count * char_w
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if text_align == 'center':
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offset = text_px // 2
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return f"({x_base_expr}) - {offset}" if offset else x_base_expr
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if text_align == 'right':
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return f"({x_base_expr}) - {text_px}" if text_px else x_base_expr
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return x_base_expr
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def _preprocess_elements(elements: list) -> list:
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"""Expand raw element dicts into template-ready dicts with anchor expressions.
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Invisible elements (visible=False) are excluded from generated code entirely.
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"""
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result = []
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for el in elements:
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# Skip hidden elements — they exist only in the preview
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if el.get('visible') is False:
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continue
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p = dict(el)
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t = el.get('type', '')
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# Section elements are layer-list annotations only — no canvas output
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if t == 'section':
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continue
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x_anchor = el.get('xAnchor') or None
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y_anchor = el.get('yAnchor') or None
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p['min_width'] = int(el.get('minWidth', 0) or 0)
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if t in ('text', 'clock'):
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font_key = el.get('font', 'press_start')
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p['font_attr'] = _FONT_ATTR_MAP.get(font_key, 'regular_font')
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p['rgb_tuple'] = _rgb_expr(el, 255, 255, 255)
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text_align = el.get('textAlign', 'left')
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raw_x = el.get('x', 0)
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x_base_expr = _compute_pos_expr(raw_x, x_anchor, 'width')
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p['y_expr'] = _compute_pos_expr(el.get('y', 0), y_anchor, 'height')
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font_size = _FONT_SIZE_MAP.get(font_key, 8)
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char_w = _FONT_CHAR_W.get(font_key, 8)
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line_spacing = int(el.get('lineSpacing', 2))
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y_expr = p['y_expr']
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p['y2_expr'] = f"({y_expr}) + {font_size + line_spacing}"
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if t == 'text':
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t1 = el.get('text', '') or ''
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t2 = el.get('text2', '') or ''
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p['text2'] = t2
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# Detect {variable} tokens — generate format_map() call instead of literal
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_var_re = re.compile(r'\{([a-zA-Z_]\w*)\}')
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p['text_is_template'] = bool(_var_re.search(t1) or _var_re.search(t2))
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ref_len = max(len(t1), len(t2)) if t2 else len(t1)
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p['x_expr'] = _aligned_x_expr(x_base_expr, text_align, ref_len, char_w)
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p['x2_expr'] = p['x_expr'] # second line uses same x
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else: # clock
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fmt1 = el.get('format', '%H:%M') or '%H:%M'
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fmt2 = el.get('format2', '') or ''
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p['format2'] = fmt2
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ref_len = max(len(fmt1), len(fmt2)) if fmt2 else len(fmt1)
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p['x_expr'] = _aligned_x_expr(x_base_expr, text_align, ref_len, char_w)
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p['x2_expr'] = p['x_expr']
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p['blink'] = bool(el.get('blink', False))
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elif t == 'dynamic_text':
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binding = el.get('binding', {})
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p['binding_source'] = binding.get('source', 'config')
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p['binding_key'] = binding.get('key', '')
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p['binding_format'] = binding.get('format')
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font_key = el.get('font', 'press_start')
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p['font_attr'] = _FONT_ATTR_MAP.get(font_key, 'regular_font')
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p['rgb_tuple'] = _rgb_expr(el, 255, 200, 100)
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x_base_expr = _compute_pos_expr(el.get('x', 0), x_anchor, 'width')
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p['x_expr'] = x_base_expr # dynamic text: runtime content determines width; use raw pos
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p['y_expr'] = _compute_pos_expr(el.get('y', 0), y_anchor, 'height')
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p['blink'] = bool(el.get('blink', False))
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elif t == 'rectangle':
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x_expr = _compute_pos_expr(el.get('x', 0), x_anchor, 'width')
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y_expr = _compute_pos_expr(el.get('y', 0), y_anchor, 'height')
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w = el.get('width', 10)
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h = el.get('height', 8)
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p['x_expr'] = x_expr
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p['y_expr'] = y_expr
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# x2/y2 as runtime expressions to support anchored positions
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p['x2_expr'] = f"({x_expr}) + {w}"
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p['y2_expr'] = f"({y_expr}) + {h}"
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fill = (
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[el.get('fillR', 0), el.get('fillG', 0), el.get('fillB', 128)]
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if el.get('hasFill', True) else None
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)
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outline = (
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[el.get('outR', 255), el.get('outG', 255), el.get('outB', 255)]
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if el.get('hasOutline', True) else None
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)
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p['fill_tuple'] = _as_fill_filter(fill)
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p['outline_tuple'] = _as_fill_filter(outline)
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p['blink'] = bool(el.get('blink', False))
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elif t in ('line', 'divider'):
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if t == 'divider':
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orient = el.get('orientation', 'horizontal')
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if orient == 'horizontal':
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y_val = el.get('y', 16)
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y_expr = _compute_pos_expr(y_val, y_anchor, 'height')
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p.update(x0_expr='0', y0_expr=y_expr, x1_expr='width - 1', y1_expr=y_expr)
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else:
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x_val = el.get('x', 64)
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x_expr = _compute_pos_expr(x_val, x_anchor, 'width')
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p.update(x0_expr=x_expr, y0_expr='0', x1_expr=x_expr, y1_expr='height - 1')
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else:
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p['x0_expr'] = _compute_pos_expr(el.get('x0', 0), x_anchor, 'width')
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p['y0_expr'] = _compute_pos_expr(el.get('y0', 0), y_anchor, 'height')
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p['x1_expr'] = str(_safe_int(el.get('x1'), 127))
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p['y1_expr'] = str(_safe_int(el.get('y1'), 0))
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p['rgb_tuple'] = _rgb_expr(el, 180, 180, 180)
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p['line_width'] = _safe_int(el.get('lineWidth'), 1, 1, 64)
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p['blink'] = bool(el.get('blink', False))
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elif t == 'progress_bar':
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p['x_expr'] = _compute_pos_expr(el.get('x', 0), x_anchor, 'width')
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p['y_expr'] = _compute_pos_expr(el.get('y', 0), y_anchor, 'height')
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p['bar_width'] = int(el.get('barWidth', 40))
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p['bar_height'] = int(el.get('barHeight', 6))
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binding = el.get('binding', {})
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p['binding_key'] = binding.get('key', '')
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p['fill_tuple'] = f"({el.get('r', 100)}, {el.get('g', 200)}, {el.get('b', 100)})"
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bg = (
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[el.get('bgR', 30), el.get('bgG', 30), el.get('bgB', 30)]
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if el.get('hasBg', True) else None
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)
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outline = (
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[el.get('outR', 100), el.get('outG', 100), el.get('outB', 100)]
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if el.get('hasOutline', True) else None
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)
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p['bg_tuple'] = _as_fill_filter(bg)
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p['outline_tuple'] = _as_fill_filter(outline)
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p['blink'] = bool(el.get('blink', False))
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elif t == 'arc':
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x_expr = _compute_pos_expr(el.get('x', 0), x_anchor, 'width')
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y_expr = _compute_pos_expr(el.get('y', 0), y_anchor, 'height')
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w = el.get('width', 24)
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h = el.get('height', 24)
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p['x_expr'] = x_expr
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p['y_expr'] = y_expr
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p['x2_expr'] = f"({x_expr}) + {w}"
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p['y2_expr'] = f"({y_expr}) + {h}"
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p['start_angle'] = int(el.get('startAngle', 0))
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p['end_angle'] = int(el.get('endAngle', 270))
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p['line_width'] = _safe_int(el.get('lineWidth'), 2, 1, 64)
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p['rgb_tuple'] = _rgb_expr(el, 255, 200, 0)
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p['blink'] = bool(el.get('blink', False))
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elif t == 'ellipse':
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x_expr = _compute_pos_expr(el.get('x', 0), x_anchor, 'width')
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y_expr = _compute_pos_expr(el.get('y', 0), y_anchor, 'height')
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w = el.get('width', 24)
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h = el.get('height', 12)
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p['x_expr'] = x_expr
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p['y_expr'] = y_expr
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p['x2_expr'] = f"({x_expr}) + {w}"
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p['y2_expr'] = f"({y_expr}) + {h}"
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fill = (
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[el.get('fillR', 0), el.get('fillG', 100), el.get('fillB', 200)]
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if el.get('hasFill', True) else None
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)
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outline = (
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[el.get('outR', 100), el.get('outG', 180), el.get('outB', 255)]
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if el.get('hasOutline', True) else None
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)
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p['fill_tuple'] = _as_fill_filter(fill)
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p['outline_tuple'] = _as_fill_filter(outline)
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p['blink'] = bool(el.get('blink', False))
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elif t == 'pixel':
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p['x_expr'] = _compute_pos_expr(el.get('x', 0), x_anchor, 'width')
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p['y_expr'] = _compute_pos_expr(el.get('y', 0), y_anchor, 'height')
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p['rgb_tuple'] = _rgb_expr(el, 255, 255, 255)
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p['blink'] = bool(el.get('blink', False))
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elif t == 'rounded_rectangle':
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x_expr = _compute_pos_expr(el.get('x', 0), x_anchor, 'width')
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y_expr = _compute_pos_expr(el.get('y', 0), y_anchor, 'height')
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w = el.get('width', 24)
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h = el.get('height', 10)
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p['x_expr'] = x_expr
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p['y_expr'] = y_expr
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p['x2_expr'] = f"({x_expr}) + {w}"
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p['y2_expr'] = f"({y_expr}) + {h}"
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p['border_radius'] = int(el.get('borderRadius', 3))
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fill = (
|
|
[el.get('fillR', 0), el.get('fillG', 80), el.get('fillB', 180)]
|
|
if el.get('hasFill', True) else None
|
|
)
|
|
outline = (
|
|
[el.get('outR', 120), el.get('outG', 180), el.get('outB', 255)]
|
|
if el.get('hasOutline', True) else None
|
|
)
|
|
p['fill_tuple'] = _as_fill_filter(fill)
|
|
p['outline_tuple'] = _as_fill_filter(outline)
|
|
p['blink'] = bool(el.get('blink', False))
|
|
|
|
elif t == 'countdown':
|
|
font_key = el.get('font', 'four_by_six')
|
|
p['font_attr'] = _FONT_ATTR_MAP.get(font_key, 'extra_small_font')
|
|
p['rgb_tuple'] = _rgb_expr(el, 255, 180, 0)
|
|
binding = el.get('binding', {})
|
|
p['binding_key'] = binding.get('key', '')
|
|
p['countdown_format'] = el.get('countdownFormat', 'dh')
|
|
x_base_expr = _compute_pos_expr(el.get('x', 0), x_anchor, 'width')
|
|
p['x_expr'] = x_base_expr
|
|
p['y_expr'] = _compute_pos_expr(el.get('y', 0), y_anchor, 'height')
|
|
p['blink'] = bool(el.get('blink', False))
|
|
|
|
elif t == 'pips':
|
|
p['x_expr'] = _compute_pos_expr(el.get('x', 0), x_anchor, 'width')
|
|
p['y_expr'] = _compute_pos_expr(el.get('y', 0), y_anchor, 'height')
|
|
p['pip_count'] = max(1, int(el.get('count', 5)))
|
|
p['pip_size'] = max(1, int(el.get('pipSize', 4)))
|
|
p['pip_spacing'] = max(0, int(el.get('pipSpacing', 2)))
|
|
p['show_empty'] = bool(el.get('showEmpty', True))
|
|
binding = el.get('binding', {})
|
|
p['binding_key'] = binding.get('key', '')
|
|
p['fill_tuple'] = f"({el.get('r', 255)}, {el.get('g', 200)}, {el.get('b', 0)})"
|
|
p['empty_tuple'] = f"({el.get('emptyR', 50)}, {el.get('emptyG', 50)}, {el.get('emptyB', 50)})"
|
|
p['blink'] = bool(el.get('blink', False))
|
|
|
|
elif t == 'sparkline':
|
|
x_expr = _compute_pos_expr(el.get('x', 0), x_anchor, 'width')
|
|
y_expr = _compute_pos_expr(el.get('y', 0), y_anchor, 'height')
|
|
p['x_expr'] = x_expr
|
|
p['y_expr'] = y_expr
|
|
p['bar_width_px'] = int(el.get('width', 40))
|
|
p['bar_height_px'] = int(el.get('height', 12))
|
|
p['bar_count'] = max(1, int(el.get('barCount', 8)))
|
|
p['bar_spacing'] = max(0, int(el.get('barSpacing', 1)))
|
|
binding = el.get('binding', {})
|
|
p['binding_key'] = binding.get('key', '')
|
|
p['fill_tuple'] = f"({el.get('r', 80)}, {el.get('g', 200)}, {el.get('b', 120)})"
|
|
bg = [el.get('bgR', 30), el.get('bgG', 30), el.get('bgB', 30)] if el.get('hasBg', False) else None
|
|
p['bg_tuple'] = _as_fill_filter(bg)
|
|
p['blink'] = bool(el.get('blink', False))
|
|
|
|
elif t == 'gauge':
|
|
x_expr = _compute_pos_expr(el.get('x', 0), x_anchor, 'width')
|
|
y_expr = _compute_pos_expr(el.get('y', 0), y_anchor, 'height')
|
|
w = el.get('width', 32)
|
|
h = el.get('height', 32)
|
|
p['x_expr'] = x_expr
|
|
p['y_expr'] = y_expr
|
|
p['x2_expr'] = f"({x_expr}) + {w}"
|
|
p['y2_expr'] = f"({y_expr}) + {h}"
|
|
p['start_angle'] = int(el.get('startAngle', 135))
|
|
p['end_angle'] = int(el.get('endAngle', 45))
|
|
p['line_width'] = _safe_int(el.get('lineWidth'), 3, 1, 64)
|
|
p['rgb_tuple'] = _rgb_expr(el, 80, 220, 80)
|
|
track = (
|
|
[el.get('trackR', 40), el.get('trackG', 40), el.get('trackB', 40)]
|
|
if el.get('hasTrack', True) else None
|
|
)
|
|
p['track_tuple'] = _as_fill_filter(track)
|
|
binding = el.get('binding', {})
|
|
p['binding_key'] = binding.get('key', '')
|
|
font_key = el.get('font', 'four_by_six')
|
|
p['font_attr'] = _FONT_ATTR_MAP.get(font_key, 'extra_small_font')
|
|
p['show_label'] = bool(el.get('showLabel', True))
|
|
p['label_tuple'] = f"({el.get('labelR', 200)}, {el.get('labelG', 200)}, {el.get('labelB', 200)})"
|
|
p['blink'] = bool(el.get('blink', False))
|
|
|
|
elif t == 'marquee':
|
|
font_key = el.get('font', 'press_start')
|
|
p['font_attr'] = _FONT_ATTR_MAP.get(font_key, 'regular_font')
|
|
p['rgb_tuple'] = _rgb_expr(el, 255, 255, 255)
|
|
p['y_expr'] = _compute_pos_expr(el.get('y', 0), y_anchor, 'height')
|
|
p['text'] = el.get('text', 'Scrolling text')
|
|
p['char_w'] = _FONT_CHAR_W.get(font_key, 8)
|
|
p['gap'] = int(el.get('gap', 16))
|
|
p['scroll_speed'] = max(1, int(el.get('scrollSpeed', 1)))
|
|
p['direction'] = el.get('direction', 'left')
|
|
# Data key stored in self._data for stateful scrolling across display() calls
|
|
raw_id = str(el.get('id', 0)).replace('-', '_')
|
|
p['data_key'] = f"mq_{raw_id}"
|
|
p['blink'] = bool(el.get('blink', False))
|
|
|
|
result.append(p)
|
|
return result
|
|
|
|
|
|
def _generate_plugin_files(data: dict) -> dict:
|
|
"""
|
|
Generate all plugin file contents as strings.
|
|
|
|
Returns dict: {'manager.py', 'manifest.json', 'config_schema.json', 'requirements.txt'}
|
|
Raises ValueError with a human-readable message on any validation failure.
|
|
"""
|
|
metadata = data.get('metadata', {})
|
|
elements = data.get('elements', [])
|
|
data_model = data.get('dataModel', {})
|
|
config_vars = data_model.get('configVars', [])
|
|
|
|
plugin_id = metadata.get('id', '').strip()
|
|
if not _PLUGIN_ID_RE.match(plugin_id):
|
|
raise ComposerInputError(
|
|
'Plugin ID must start with a lowercase letter and contain only '
|
|
'lowercase letters, numbers, and hyphens (max 63 chars).'
|
|
)
|
|
|
|
plugin_name = metadata.get('name', '').strip()
|
|
if not plugin_name:
|
|
raise ComposerInputError('Plugin name is required.')
|
|
# The template drops this straight into manager.py's module docstring. A
|
|
# name carrying a triple quote closes that docstring and everything after
|
|
# it becomes module-level code, which /api/install writes to disk and the
|
|
# loader imports and runs:
|
|
#
|
|
# Clock"""\nimport os; PWNED = os.getuid()\n"""
|
|
# -> import os <- executed on load
|
|
# PWNED = os.getuid()
|
|
#
|
|
# ast.parse further down only rejects invalid syntax, and that is valid.
|
|
_reject_source_breaking(plugin_name, 'Plugin name')
|
|
|
|
author = metadata.get('author', '').strip()
|
|
if not author:
|
|
raise ComposerInputError('Author is required.')
|
|
|
|
version = metadata.get('version', '1.0.0').strip()
|
|
|
|
# Validate config var keys are valid Python identifiers
|
|
for cv in config_vars:
|
|
key = cv.get('key', '')
|
|
if not _PYTHON_IDENT_RE.match(key):
|
|
raise ComposerInputError(f'Config variable key "{key}" is not a valid Python identifier.')
|
|
|
|
class_name = _to_class_name(plugin_name)
|
|
# Only consider visible elements for code generation flags
|
|
visible_elements = [e for e in elements if e.get('visible') is not False]
|
|
processed = _preprocess_elements(elements)
|
|
has_clock = any(e.get('type') == 'clock' for e in visible_elements)
|
|
has_blink = any(e.get('blink') for e in visible_elements)
|
|
has_countdown = any(e.get('type') == 'countdown' for e in visible_elements)
|
|
_var_re = re.compile(r'\{[a-zA-Z_]\w*\}')
|
|
has_text_template = any(
|
|
e.get('type') == 'text' and (
|
|
_var_re.search(e.get('text', '') or '') or
|
|
_var_re.search(e.get('text2', '') or '')
|
|
)
|
|
for e in visible_elements
|
|
)
|
|
|
|
# Background fill color (None → don't render, use LED panel's native black)
|
|
bg_color: str | None = None
|
|
bg_raw = metadata.get('bgColor')
|
|
if isinstance(bg_raw, dict):
|
|
r, g, b = int(bg_raw.get('r', 0)), int(bg_raw.get('g', 0)), int(bg_raw.get('b', 0))
|
|
if r or g or b:
|
|
bg_color = f'({r}, {g}, {b})'
|
|
|
|
# Render manager.py
|
|
env = _get_jinja_env()
|
|
try:
|
|
tmpl = env.get_template('manager.py.j2')
|
|
except jinja2.TemplateNotFound:
|
|
raise ComposerInputError('Code generation template not found. This is a server configuration issue.')
|
|
|
|
manager_py = tmpl.render(
|
|
plugin_name=plugin_name,
|
|
class_name=class_name,
|
|
plugin_id=plugin_id,
|
|
generated_date=datetime.now().strftime('%Y-%m-%d'),
|
|
config_vars=config_vars,
|
|
elements=processed,
|
|
has_clock=has_clock,
|
|
has_blink=has_blink,
|
|
has_countdown=has_countdown,
|
|
has_text_template=has_text_template,
|
|
bg_color=bg_color,
|
|
)
|
|
|
|
# Syntax-check the generated Python
|
|
try:
|
|
ast.parse(manager_py)
|
|
except SyntaxError as exc:
|
|
raise ComposerInputError(f'Generated code has a syntax error: {exc}') from exc
|
|
|
|
# Build manifest
|
|
manifest = {
|
|
'id': plugin_id,
|
|
'name': plugin_name,
|
|
'version': version,
|
|
'author': author,
|
|
'description': metadata.get('description', 'Custom plugin created with LEDMatrix Plugin Composer'),
|
|
'category': metadata.get('category', 'custom'),
|
|
'tags': ['composer', 'custom'],
|
|
'entry_point': 'manager.py',
|
|
'class_name': class_name,
|
|
'display_modes': [plugin_id],
|
|
'compatible_versions': ['>=2.0.0'],
|
|
'last_updated': datetime.now().strftime('%Y-%m-%d'),
|
|
'update_interval': int(metadata.get('update_interval', 60)),
|
|
'default_duration': float(metadata.get('display_duration', 15)),
|
|
'versions': [
|
|
{'released': datetime.now().strftime('%Y-%m-%d'), 'version': version}
|
|
],
|
|
}
|
|
|
|
# Validate manifest against the project's schema
|
|
if composer_bp.project_root:
|
|
schema_path = Path(composer_bp.project_root) / 'schema' / 'manifest_schema.json'
|
|
if schema_path.exists():
|
|
schema = json.loads(schema_path.read_text())
|
|
validator = jsonschema.Draft7Validator(schema)
|
|
errors = list(validator.iter_errors(manifest))
|
|
if errors:
|
|
msgs = '; '.join(e.message for e in errors[:3])
|
|
raise ComposerInputError(f'Manifest validation failed: {msgs}')
|
|
|
|
# Build config_schema
|
|
type_map = {
|
|
'string': {'type': 'string'},
|
|
'number': {'type': 'number', 'minimum': 0},
|
|
'boolean': {'type': 'boolean'},
|
|
'color': {
|
|
'type': 'array',
|
|
'items': {'type': 'integer', 'minimum': 0, 'maximum': 255},
|
|
'minItems': 3,
|
|
'maxItems': 3,
|
|
},
|
|
}
|
|
|
|
config_properties = {
|
|
'enabled': {'type': 'boolean', 'default': True},
|
|
'display_duration': {'type': 'number', 'minimum': 1, 'default': float(metadata.get('display_duration', 15))},
|
|
}
|
|
for cv in config_vars:
|
|
cv_type = cv.get('type', 'string')
|
|
prop = dict(type_map.get(cv_type, {'type': 'string'}))
|
|
if cv.get('description'):
|
|
prop['description'] = cv['description']
|
|
if cv.get('label'):
|
|
prop['title'] = cv['label']
|
|
default = cv.get('default', '')
|
|
if cv_type == 'number':
|
|
try:
|
|
prop['default'] = float(default) if default != '' else 0
|
|
except (TypeError, ValueError):
|
|
prop['default'] = 0
|
|
elif cv_type == 'boolean':
|
|
prop['default'] = bool(default)
|
|
else:
|
|
prop['default'] = default
|
|
config_properties[cv['key']] = prop
|
|
|
|
config_schema = {
|
|
'$schema': 'http://json-schema.org/draft-07/schema#',
|
|
'type': 'object',
|
|
'properties': config_properties,
|
|
}
|
|
|
|
return {
|
|
'manager.py': manager_py,
|
|
'manifest.json': json.dumps(manifest, indent=2),
|
|
'config_schema.json': json.dumps(config_schema, indent=2),
|
|
'requirements.txt': '',
|
|
}
|
|
|
|
|
|
class ComposerInputError(ValueError):
|
|
"""A validation failure whose message is safe to show the caller.
|
|
|
|
_generate_plugin_files raises this for input the user can fix. Anything
|
|
else reaching the handlers is unexpected, and its text may name internal
|
|
paths or library internals, so it is logged and answered generically.
|
|
"""
|
|
|
|
|
|
def _plugin_dir(plugin_id: str) -> Optional[Path]:
|
|
"""Resolve a plugin directory, refusing anything outside plugins_dir.
|
|
|
|
_PLUGIN_ID_RE already rejects '/', '.' and '..', so this cannot currently
|
|
fail -- every traversal payload is blocked before it gets here. It exists
|
|
anyway for two reasons: the guarantee then lives with the path building
|
|
rather than in a regex several hundred lines away, so loosening that regex
|
|
later cannot silently open a traversal; and it is the form static analysis
|
|
recognises, which is why CodeQL reported sixteen path-injection alerts
|
|
against code that was already safe.
|
|
|
|
Returns None for a malformed id or one that escapes the base. It returns
|
|
rather than raises so the handlers answer with a fixed literal: routing a
|
|
caught exception's text into a response is what py/stack-trace-exposure
|
|
flags, and there is nothing here a caller needs beyond "that id is not ok".
|
|
"""
|
|
if not _PLUGIN_ID_RE.match(plugin_id or ''):
|
|
return None
|
|
# secure_filename strips path separators and traversal. Every id the regex
|
|
# above accepts passes through it byte-for-byte -- verified across the whole
|
|
# accepted alphabet -- so this cannot rewrite a caller's id into a
|
|
# different plugin's directory; if it changes anything, the id was not one
|
|
# we accept and we refuse rather than silently redirect.
|
|
safe_id = secure_filename(plugin_id)
|
|
if safe_id != plugin_id:
|
|
return None
|
|
base = os.path.realpath(str(composer_bp.plugins_dir))
|
|
candidate = os.path.realpath(os.path.join(base, safe_id))
|
|
# A plugin directory must be a *child* of the base, never the base itself:
|
|
# install() calls shutil.rmtree(target) when force is set, so resolving to
|
|
# the plugins root would delete every installed plugin.
|
|
#
|
|
# commonpath, not startswith: "/plugins-evil" starts with "/plugins" but is
|
|
# a different directory. This is also the form static analysis recognises
|
|
# as a containment check.
|
|
if candidate == base or os.path.commonpath([base, candidate]) != base:
|
|
return None
|
|
return Path(candidate)
|
|
|
|
|
|
def _save_composer_state(target_dir: Path, payload: dict) -> None:
|
|
"""Persist the raw composer payload alongside the generated plugin files."""
|
|
(target_dir / '_composer_state.json').write_text(
|
|
json.dumps(payload, indent=2, ensure_ascii=False), encoding='utf-8'
|
|
)
|
|
|
|
|
|
def _pack_zip(files: dict, plugin_id: str) -> io.BytesIO:
|
|
"""Pack generated plugin files into an in-memory ZIP."""
|
|
buf = io.BytesIO()
|
|
with zipfile.ZipFile(buf, 'w', compression=zipfile.ZIP_DEFLATED) as zf:
|
|
for filename, content in files.items():
|
|
info = zipfile.ZipInfo(f'{plugin_id}/{filename}')
|
|
info.compress_type = zipfile.ZIP_DEFLATED
|
|
zf.writestr(info, content.encode('utf-8') if isinstance(content, str) else content)
|
|
buf.seek(0)
|
|
return buf
|
|
|
|
|
|
# ── Routes ────────────────────────────────────────────────────────────────────
|
|
|
|
@composer_bp.route('/')
|
|
def index():
|
|
return render_template('v3/composer.html')
|
|
|
|
|
|
@composer_bp.route('/api/generate', methods=['POST'])
|
|
def generate_zip():
|
|
data = request.get_json(force=True, silent=True)
|
|
if not data:
|
|
return jsonify({'status': 'error', 'message': 'No JSON body'}), 400
|
|
try:
|
|
files = _generate_plugin_files(data)
|
|
except ComposerInputError as exc:
|
|
return jsonify({'status': 'error', 'message': str(exc)}), 422
|
|
except ValueError as exc:
|
|
# Not one of ours: the text may name internal paths or library
|
|
# internals, so log it and answer generically.
|
|
logger.exception('Unexpected error generating plugin files: %s', exc)
|
|
return jsonify({'status': 'error', 'message': 'Could not generate plugin files'}), 422
|
|
|
|
plugin_id = data.get('metadata', {}).get('id', 'plugin')
|
|
files['_composer_state.json'] = json.dumps(data, indent=2, ensure_ascii=False)
|
|
zip_buf = _pack_zip(files, plugin_id)
|
|
return send_file(
|
|
zip_buf,
|
|
mimetype='application/zip',
|
|
as_attachment=True,
|
|
download_name=f'{plugin_id}.zip',
|
|
)
|
|
|
|
|
|
@composer_bp.route('/api/install', methods=['POST'])
|
|
def install_locally():
|
|
if not composer_bp.plugins_dir:
|
|
return jsonify({'status': 'error', 'message': 'Plugin directory not configured'}), 503
|
|
|
|
data = request.get_json(force=True, silent=True)
|
|
if not data:
|
|
return jsonify({'status': 'error', 'message': 'No JSON body'}), 400
|
|
|
|
try:
|
|
files = _generate_plugin_files(data)
|
|
except ComposerInputError as exc:
|
|
return jsonify({'status': 'error', 'message': str(exc)}), 422
|
|
except ValueError as exc:
|
|
# Not one of ours: the text may name internal paths or library
|
|
# internals, so log it and answer generically.
|
|
logger.exception('Unexpected error generating plugin files: %s', exc)
|
|
return jsonify({'status': 'error', 'message': 'Could not generate plugin files'}), 422
|
|
|
|
plugin_id = data.get('metadata', {}).get('id', '')
|
|
# _generate_plugin_files() above already validates metadata.id via this
|
|
# same regex before it will return, but that guarantee lives in a
|
|
# different function -- re-check here, at the point the path is actually
|
|
# built, so this route stays safe on its own if that call is ever
|
|
# reordered or changed.
|
|
target = _plugin_dir(plugin_id)
|
|
if target is None:
|
|
return jsonify({'status': 'error', 'message': 'Invalid plugin ID'}), 400
|
|
force = bool(data.get('_force', False))
|
|
|
|
if target.exists() and not force:
|
|
return jsonify({
|
|
'status': 'conflict',
|
|
'message': f'Plugin "{plugin_id}" is already installed.',
|
|
}), 409
|
|
|
|
try:
|
|
if target.exists() and force:
|
|
import shutil as _shutil
|
|
_shutil.rmtree(target)
|
|
target.mkdir(parents=True, exist_ok=False)
|
|
for filename, content in files.items():
|
|
(target / filename).write_text(content, encoding='utf-8')
|
|
_save_composer_state(target, data)
|
|
except OSError as exc:
|
|
logger.error('Failed to write plugin files for %s: %s', plugin_id, exc)
|
|
return jsonify({'status': 'error', 'message': 'Failed to write plugin files'}), 500
|
|
|
|
# Trigger plugin discovery so it shows up in the Plugin Manager immediately
|
|
if composer_bp.plugin_manager:
|
|
try:
|
|
composer_bp.plugin_manager.discover_plugins()
|
|
except Exception as exc:
|
|
logger.warning('discover_plugins() failed after composer install: %s', exc)
|
|
|
|
return jsonify({
|
|
'status': 'success',
|
|
'message': f'Plugin "{plugin_id}" installed successfully.',
|
|
'plugin_id': plugin_id,
|
|
})
|
|
|
|
|
|
@composer_bp.route('/api/fonts/<font_name>')
|
|
def serve_font(font_name):
|
|
"""Serve an allowlisted font file for canvas FontFace loading."""
|
|
# Build the path from the allowlist entry, not from the request value.
|
|
# They are equal strings, so this changes nothing at runtime -- but the
|
|
# name that reaches the filesystem now provably originates in a module
|
|
# constant, which is the difference between "guarded" and "not derived
|
|
# from user input at all".
|
|
allowed_name = next((f for f in sorted(_ALLOWED_FONTS) if f == font_name), None)
|
|
if allowed_name is None:
|
|
return '', 404
|
|
if not composer_bp.project_root:
|
|
return '', 503
|
|
font_path = Path(composer_bp.project_root) / 'assets' / 'fonts' / allowed_name
|
|
if not font_path.exists():
|
|
return '', 404
|
|
return send_file(str(font_path), mimetype='font/ttf')
|
|
|
|
|
|
@composer_bp.route('/api/validate-id/<plugin_id>')
|
|
def validate_id(plugin_id):
|
|
"""Check whether a plugin ID is valid and available."""
|
|
if not _PLUGIN_ID_RE.match(plugin_id):
|
|
return jsonify({'valid': False, 'available': False, 'reason': 'Invalid format'})
|
|
if composer_bp.plugins_dir:
|
|
resolved = _plugin_dir(plugin_id)
|
|
if resolved is None:
|
|
return jsonify({'valid': False, 'available': False, 'reason': 'Invalid format'})
|
|
taken = resolved.exists()
|
|
if taken:
|
|
return jsonify({'valid': True, 'available': False, 'reason': 'Already installed'})
|
|
return jsonify({'valid': True, 'available': True})
|
|
|
|
|
|
@composer_bp.route('/api/plugins')
|
|
def list_plugins():
|
|
"""List installed plugins, flagging which ones have a saved composer state."""
|
|
if not composer_bp.plugins_dir:
|
|
return jsonify([])
|
|
plugins_dir = Path(composer_bp.plugins_dir)
|
|
results = []
|
|
for entry in sorted(plugins_dir.iterdir()):
|
|
if not entry.is_dir():
|
|
continue
|
|
manifest_path = entry / 'manifest.json'
|
|
if not manifest_path.exists():
|
|
continue
|
|
try:
|
|
manifest = json.loads(manifest_path.read_text())
|
|
except Exception as e:
|
|
logger.warning("Skipping %s: unreadable manifest.json (%s)", entry.name, e)
|
|
continue
|
|
has_state = (entry / '_composer_state.json').exists()
|
|
results.append({
|
|
'id': manifest.get('id', entry.name),
|
|
'name': manifest.get('name', entry.name),
|
|
'version': manifest.get('version', ''),
|
|
'author': manifest.get('author', ''),
|
|
'has_composer_state': has_state,
|
|
})
|
|
return jsonify(results)
|
|
|
|
|
|
@composer_bp.route('/api/preview', methods=['POST'])
|
|
def preview_code():
|
|
"""Generate plugin files and return them as JSON for the code preview modal."""
|
|
data = request.get_json(force=True, silent=True)
|
|
if not data:
|
|
return jsonify({'status': 'error', 'message': 'No JSON body'}), 400
|
|
try:
|
|
files = _generate_plugin_files(data)
|
|
except ComposerInputError as exc:
|
|
return jsonify({'status': 'error', 'message': str(exc)}), 422
|
|
except ValueError as exc:
|
|
# Not one of ours: the text may name internal paths or library
|
|
# internals, so log it and answer generically.
|
|
logger.exception('Unexpected error generating plugin files: %s', exc)
|
|
return jsonify({'status': 'error', 'message': 'Could not generate plugin files'}), 422
|
|
return jsonify({
|
|
'status': 'ok',
|
|
'files': {
|
|
'manager.py': files['manager.py'],
|
|
'manifest.json': files['manifest.json'],
|
|
'config_schema.json': files['config_schema.json'],
|
|
},
|
|
})
|
|
|
|
|
|
@composer_bp.route('/api/load/<plugin_id>')
|
|
def load_plugin(plugin_id):
|
|
"""Load a plugin's composer state for editing.
|
|
|
|
If a _composer_state.json exists, return it verbatim.
|
|
Otherwise, extract config vars from config_schema.json for a partial import.
|
|
"""
|
|
if not composer_bp.plugins_dir:
|
|
return jsonify({'status': 'error', 'message': 'Plugin directory not configured'}), 503
|
|
plugin_dir = _plugin_dir(plugin_id)
|
|
if plugin_dir is None:
|
|
return jsonify({'status': 'error', 'message': 'Invalid plugin ID'}), 400
|
|
if not plugin_dir.exists():
|
|
return jsonify({'status': 'error', 'message': 'Plugin not found'}), 404
|
|
|
|
# Full composer state
|
|
state_path = plugin_dir / '_composer_state.json'
|
|
if state_path.exists():
|
|
try:
|
|
state = json.loads(state_path.read_text())
|
|
return jsonify({'status': 'ok', 'source': 'composer', 'state': state})
|
|
except Exception as exc:
|
|
logger.error('Failed to read composer state for %s: %s', plugin_id, exc)
|
|
return jsonify({'status': 'error', 'message': 'Failed to read state'}), 500
|
|
|
|
# Partial import from config_schema.json
|
|
schema_path = plugin_dir / 'config_schema.json'
|
|
manifest_path = plugin_dir / 'manifest.json'
|
|
config_vars = []
|
|
|
|
if schema_path.exists():
|
|
try:
|
|
schema = json.loads(schema_path.read_text())
|
|
props = schema.get('properties', {})
|
|
skip = {'enabled', 'display_duration', 'update_interval'}
|
|
type_map = {'boolean': 'boolean', 'number': 'number', 'integer': 'number', 'string': 'string'}
|
|
for key, prop in props.items():
|
|
if key in skip:
|
|
continue
|
|
prop_type = prop.get('type', 'string')
|
|
if isinstance(prop_type, list):
|
|
prop_type = next((t for t in prop_type if t != 'null'), 'string')
|
|
# Detect color arrays
|
|
if prop_type == 'array' and prop.get('maxItems') == 3:
|
|
cv_type = 'color'
|
|
else:
|
|
cv_type = type_map.get(prop_type, 'string')
|
|
config_vars.append({
|
|
'key': key,
|
|
'label': prop.get('title', key.replace('_', ' ').title()),
|
|
'type': cv_type,
|
|
'default': prop.get('default', ''),
|
|
'description': prop.get('description', ''),
|
|
})
|
|
except Exception as e:
|
|
logger.warning("Failed to parse config_schema.json for %s: %s", plugin_id, e)
|
|
|
|
manifest = {}
|
|
if manifest_path.exists():
|
|
try:
|
|
manifest = json.loads(manifest_path.read_text())
|
|
except Exception:
|
|
pass
|
|
|
|
partial_state = {
|
|
'composer_version': '1.0',
|
|
'metadata': {
|
|
'id': manifest.get('id', plugin_id),
|
|
'name': manifest.get('name', plugin_id),
|
|
'author': manifest.get('author', ''),
|
|
'version': manifest.get('version', '1.0.0'),
|
|
'description': manifest.get('description', ''),
|
|
'category': manifest.get('category', 'custom'),
|
|
'display_duration': manifest.get('default_duration', 15),
|
|
'update_interval': manifest.get('update_interval', 60),
|
|
'api_requirements': manifest.get('api_requirements', []),
|
|
},
|
|
'elements': [],
|
|
'dataModel': {'configVars': config_vars, 'dataSources': [], 'computedVars': []},
|
|
}
|
|
return jsonify({'status': 'ok', 'source': 'schema_import', 'state': partial_state})
|