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definma-api/src/api.ts

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import swagger from 'swagger-ui-express';
import jsonRefParser, {JSONSchema} from '@apidevtools/json-schema-ref-parser';
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import oasParser from '@apidevtools/swagger-parser';
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// modifies the normal swagger-ui-express package
// usage: app.use('/api-doc', api.serve(), api.setup());
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// the paths property can be split using allOf
// further route documentation can be included in the x-doc property
export default class api {
static serve () {
return swagger.serve;
}
static setup () {
let apiDoc: JSONSchema = {};
jsonRefParser.bundle('api/api.yaml', (err, doc) => { // parse yaml
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if (err) throw err;
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apiDoc = doc;
apiDoc.paths = apiDoc.paths.allOf.reduce((s, e) => Object.assign(s, e)); // bundle routes
apiDoc = this.resolveXDoc(apiDoc);
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oasParser.validate(apiDoc, (err, api) => { // validate oas schema
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if (err) {
console.error(err);
}
else {
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console.info(process.env.NODE_ENV === 'test' ? '' : 'API ok, version ' + api.info.version);
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swagger.setup(apiDoc);
}
});
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});
return swagger.setup(apiDoc, {customCssUrl: '/static/styles/swagger.css'})
}
private static resolveXDoc (doc) { // resolve x-doc properties recursively
Object.keys(doc).forEach(key => {
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if (doc[key] !== null && doc[key].hasOwnProperty('x-doc')) { // add x-doc to description, is styled via css
doc[key].description += '<details class="docs"><summary>docs</summary>' + doc[key]['x-doc'] + '</details>';
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}
else if (typeof doc[key] === 'object' && doc[key] !== null) { // go deeper into recursion
doc[key] = this.resolveXDoc(doc[key]);
}
});
return doc;
}
}