52 lines
1.8 KiB
TypeScript
52 lines
1.8 KiB
TypeScript
import {
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FilteredLearningObject,
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LearningObjectIdentifier,
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LearningPathIdentifier
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} from "../../interfaces/learning-content";
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import dwengoApiLearningObjectProvider from "./dwengo-api-learning-object-provider";
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import {LearningObjectProvider} from "./learning-object-provider";
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import {EnvVars, getEnvVar} from "../../util/envvars";
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import databaseLearningObjectProvider from "./database-learning-object-provider";
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function getProvider(id: LearningObjectIdentifier): LearningObjectProvider {
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if (id.hruid.startsWith(getEnvVar(EnvVars.UserContentPrefix))) {
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return databaseLearningObjectProvider;
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} else {
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return dwengoApiLearningObjectProvider;
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}
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}
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/**
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* Service providing access to data about learning objects from the appropriate data source (database or Dwengo-api)
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*/
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const learningObjectService = {
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/**
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* Fetches a single learning object by its HRUID
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*/
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getLearningObjectById(id: LearningObjectIdentifier): Promise<FilteredLearningObject | null> {
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return getProvider(id).getLearningObjectById(id);
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},
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/**
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* Fetch full learning object data (metadata)
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*/
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getLearningObjectsFromPath(id: LearningPathIdentifier): Promise<FilteredLearningObject[]> {
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return getProvider(id).getLearningObjectsFromPath(id);
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},
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/**
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* Fetch only learning object HRUIDs
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*/
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getLearningObjectIdsFromPath(id: LearningPathIdentifier): Promise<string[]> {
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return getProvider(id).getLearningObjectIdsFromPath(id);
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},
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/**
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* Obtain a HTML-rendering of the learning object with the given identifier (as a string).
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*/
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getLearningObjectHTML(id: LearningObjectIdentifier): Promise<string | null> {
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return getProvider(id).getLearningObjectHTML(id);
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}
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};
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export default learningObjectService;
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