Ryth Azhur
3aafec6dd4
The IR called them react-message and django-message, so a FastAPI channel had to declare a DjangoMessage. They are client-message and server-message now, and the direction words hold wherever a channel is declared: Params / ClientMessage / ServerMessage, with mizan-core deriving <Pascal>Params and friends so no backend names a type itself. Django's ReactChannel and FastAPI's ReactChannel are both Channel. mizan-fastapi never registered a channels extension, so build_ir() emitted no channel at all and every payload type was invisible to codegen. It registers one now. RegistryExtension is an ABC requiring all(), which is what the IR reads — an extension that cannot enumerate its registrations no longer exists. The gate that should have caught the rename could not: tests/afi registered no channel because mizan-rust had no channel registry to register one in, so a five-package rename of the wire contract passed byte-parity without a channel byte crossing it. mizan-rust grows ChannelSlotKind, a CHANNELS slice, a #[mizan::channel] macro, and KDL emission whose wire_to_pascal matches Python's split; the AFI fixture now carries a channel with every slot and one with a single slot, so all three backends prove the contract byte for byte. MizanChannel held three Option<String> beside three has_*() predicates and unwrapped them with defaults; it holds an ordered slot vector, so an absent slot is absent rather than defaulted. The channels target emitted a React hooks file that a stage1-only consumer could not compile — react emits that now. The codegen's parity tests byte-compared emitted source against baselines without ever compiling it: they compile the generated crate and run its tests, import the generated Python package and call every method, and typecheck each TypeScript target against a consumer. Also fixed at source: app_visitor printed its import diagnostic to stdout, the stream export_mizan_ir writes KDL to, so a failed import silently corrupted the IR; the apps root was hardcoded to "apps"; _default_literal crashed build_ir on any non-JSON-serializable field default; Django and mizan-core derived Pascal names two different ways, disagreeing on every dotted channel name. ir.py builds a document and renders templates/ir/document.kdl.j2 rather than appending KDL strings with hand-tracked indentation, and named types resolve to a fixed point — a model reachable only through a union branch was referenced by a ref that no type block ever defined. The rest is the write-gate's own classifiers run over the standing tree: relative imports, silent swallows, Protocol contracts that should be ABCs, emitters hand-rendering target source, catch-all arms over closed enums, and comments narrating the project rather than the code. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
51 lines
2.8 KiB
Django/Jinja
51 lines
2.8 KiB
Django/Jinja
from __future__ import annotations
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from collections.abc import Callable
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from typing import Any
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# Built from frontends/mizan-rust with `maturin develop --features pyo3`.
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from mizan_rust import PyMizanClient, PyContextSubscription
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from .types import * # noqa: F401, F403
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from .types import BaseModel # re-import for the synthesized ContextData classes
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class MizanClient:
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"""Typed Python facade over the PyO3 mizan-rust kernel."""
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def __init__(self, base_url: str, *, session: bool = False,
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csrf_cookie_name: str = "csrftoken",
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csrf_header_name: str = "X-CSRFToken") -> None:
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self._inner = PyMizanClient(
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base_url,
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session=session,
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csrf_cookie_name=csrf_cookie_name,
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csrf_header_name=csrf_header_name,
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)
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{% for ctx in contexts %} def fetch_{{ ctx.snake }}_context(self{% for p in ctx.params %}, {{ p.ident }}: {{ p.ty }}{% if !p.required %} | None = None{% endif %}{% endfor %}) -> "{{ ctx.data_class }}":
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raw = self._inner.fetch_context("{{ ctx.name }}", {{ "{" }}{% for p in ctx.params %}{% if !loop.first %}, {% endif %}"{{ p.raw_name }}": {{ p.ident }}{% endfor %}{{ "}" }})
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return {{ ctx.data_class }}(**raw)
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def subscribe_{{ ctx.snake }}_context(self{% for p in ctx.params %}, {{ p.ident }}: {{ p.ty }}{% if !p.required %} | None = None{% endif %}{% endfor %},
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callback: Callable[[dict[str, Any]], None]) -> PyContextSubscription:
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return self._inner.subscribe_context("{{ ctx.name }}", {{ "{" }}{% for p in ctx.params %}{% if !loop.first %}, {% endif %}"{{ p.raw_name }}": {{ p.ident }}{% endfor %}{{ "}" }}, callback)
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{% if !loop.last %}
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{% endif %}{% endfor %}
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{% for call in calls %} def call_{{ call.snake }}(self{% match call.input %}{% when CallInput::Typed with (t) %}, args: {{ crate::emit::casing::pascal_case(t) }}{% when CallInput::Absent %}{% endmatch %}) -> {{ call.output }}{% if call.nullable %} | None{% endif %}:
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raw = self._inner.call("{{ call.wire_name }}", {% match call.input %}{% when CallInput::Typed with (t) %}args.model_dump(){% when CallInput::Absent %}{}{% endmatch %})
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return {{ call.output }}(**raw){% if call.nullable %} if raw is not None else None{% endif %}
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{% if !loop.last %}
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{% endif %}{% endfor %}
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def invalidate(self, context: str) -> None:
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self._inner.invalidate(context)
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def invalidate_scoped(self, context: str, params: dict[str, Any]) -> None:
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self._inner.invalidate_scoped(context, params)
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{% for dc in data_classes %}class {{ dc.class_name }}(BaseModel):
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"""Bundled return of fetch_{{ dc.snake }}_context."""
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{% for f in dc.fields %} {{ f.ident }}: {{ f.ty }}{% if f.nullable %} | None{% endif %}
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{% endfor %}{% if !loop.last %}
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{% endif %}{% endfor %}
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