An experimental TypeSpec syntax for Lexicon
fix: add blob decorators instead of modifying output
- Add @blobAccept decorator for MIME type constraints
- Add @blobMaxSize decorator for size limits
- Restore original images.json output (never modify output files!)
- Update input to use proper blob decorators
Tests passing (21/21)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
+70
-5
+10
typelex-emitter/lib/decorators.tsp
+10
typelex-emitter/lib/decorators.tsp
···
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* Without this decorator, models go into the namespace's defs.json file.
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*/
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extern dec lexiconMain(target: unknown);
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+
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/**
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* Specifies accepted MIME types for a blob field.
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*/
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extern dec blobAccept(target: unknown, types: valueof string[]);
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+
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/**
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* Specifies maximum size in bytes for a blob field.
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*/
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extern dec blobMaxSize(target: unknown, size: valueof int32);
+39
typelex-emitter/src/decorators.ts
+39
typelex-emitter/src/decorators.ts
···
5
5
const minGraphemesKey = Symbol("minGraphemes");
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const knownValuesKey = Symbol("knownValues");
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const lexiconMainKey = Symbol("lexiconMain");
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const blobAcceptKey = Symbol("blobAccept");
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const blobMaxSizeKey = Symbol("blobMaxSize");
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/**
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* @lexFormat decorator for lexicon-specific string formats
···
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export function isLexiconMain(program: Program, target: Type): boolean {
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return program.stateMap(lexiconMainKey).get(target) === true;
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}
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+
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/**
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* @blobAccept decorator for blob accept types
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*/
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export function $blobAccept(context: DecoratorContext, target: Type, types: Type) {
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const typesAny = types as any;
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if (Array.isArray(typesAny)) {
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context.program.stateMap(blobAcceptKey).set(target, typesAny);
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} else if (typesAny.kind === "Tuple" && typesAny.values) {
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const stringValues = typesAny.values.map((v: any) => v.value || v);
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context.program.stateMap(blobAcceptKey).set(target, stringValues);
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} else if (typesAny.values && Array.isArray(typesAny.values)) {
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const stringValues = typesAny.values.map((v: any) => {
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if (typeof v === 'string') return v;
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if (v.value) return v.value;
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return String(v);
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});
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context.program.stateMap(blobAcceptKey).set(target, stringValues);
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}
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}
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export function getBlobAccept(program: Program, target: Type): string[] | undefined {
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return program.stateMap(blobAcceptKey).get(target);
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}
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+
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/**
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* @blobMaxSize decorator for blob max size
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*/
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export function $blobMaxSize(context: DecoratorContext, target: Type, size: Type) {
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const numValue = (size as any).kind === "Number" || (size as any).kind === "Numeric" ? (size as any).value : size;
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context.program.stateMap(blobMaxSizeKey).set(target, Number(numValue));
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}
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export function getBlobMaxSize(program: Program, target: Type): number | undefined {
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return program.stateMap(blobMaxSizeKey).get(target);
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}
+15
-2
typelex-emitter/src/emitter.ts
+15
-2
typelex-emitter/src/emitter.ts
···
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24
LexiconUnion,
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LexiconBlob,
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} from "./types.js";
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-
import { getLexFormat, getMaxGraphemes, getMinGraphemes, getLexKnownValues, isLexiconMain } from "./decorators.js";
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import { getLexFormat, getMaxGraphemes, getMinGraphemes, getLexKnownValues, isLexiconMain, getBlobAccept, getBlobMaxSize } from "./decorators.js";
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export interface EmitterOptions {
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outputDir: string;
···
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break;
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case "bytes":
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// bytes maps to blob type in lexicon
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-
// TODO: add support for accept and maxSize decorators
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const blobDef: LexiconBlob = {
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type: "blob",
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};
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// Add blob-specific decorators
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if (prop) {
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const accept = getBlobAccept(this.program, prop);
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if (accept) {
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blobDef.accept = accept;
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}
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const maxSize = getBlobMaxSize(this.program, prop);
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if (maxSize !== undefined) {
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blobDef.maxSize = maxSize;
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}
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}
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return blobDef;
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}
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437
+1
-1
typelex-emitter/src/index.ts
+1
-1
typelex-emitter/src/index.ts
+2
-1
typelex-emitter/test/scenarios/app-bsky-embed-images/input/main.tsp
+2
-1
typelex-emitter/test/scenarios/app-bsky-embed-images/input/main.tsp
+3
-1
typelex-emitter/test/scenarios/app-bsky-embed-images/output/app/bsky/embed/images.json
+3
-1
typelex-emitter/test/scenarios/app-bsky-embed-images/output/app/bsky/embed/images.json