1 | import { ReflectiveInjector } from '../reflective_injector';
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2 | /**
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3 | * This utility function receives a spread of injectable classes
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4 | * and returns an array of all their dependencies. Also resolves
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5 | * optional dependencies.
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6 | *
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7 | * ### Important:
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8 | *
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9 | * Dynamically resolving dependencies using this function
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10 | * will not play nice with static analysis tools, including tree-shaking.
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11 | * From a static analysis perspective, any dependencies which are only resolved
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12 | * using this function will look as though they are not used (and will be
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13 | * removed by tree-shaking). This *severely* limits the usefulness of this function.
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14 | *
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15 | * ### Example:
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16 | *
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17 | * ```typescript
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18 | * class HTTP {}
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19 | * class Database {}
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20 | *
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21 | * // commenting out the decorator because the `@` symbol is spoiling
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22 | * // jsDoc rendering in vscode
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23 | * // @Injectable()
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24 | * class PersonService {
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25 | * constructor(
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26 | * private http: HTTP,
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27 | * private database: Database,
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28 | * ) {}
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29 | * }
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30 | *
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31 | * // @Injectable()
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32 | * class OrganizationService {
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33 | * constructor(
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34 | * private http: HTTP,
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35 | * private personService: PersonService,
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36 | * ) {}
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37 | * }
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38 | *
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39 | * const injector = ReflectiveInjector.resolveAndCreate(
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40 | * resolveDependencies(OrganizationService)
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41 | * );
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42 | *
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43 | * const organizationService = injector.get(OrganizationService);
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44 | * ```
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45 | */
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46 | export function resolveDependencies() {
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47 | var inputs = [];
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48 | for (var _i = 0; _i < arguments.length; _i++) {
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49 | inputs[_i] = arguments[_i];
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50 | }
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51 | var deps = new Set();
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52 | function resolver(klass) {
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53 | if (deps.has(klass))
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54 | return;
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55 | deps.add(klass);
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56 | // resolve all dependencies of the provided class and run the `resolver()` function
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57 | // on their constructor functions.
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58 | ReflectiveInjector.resolve([klass])
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59 | .reduce(function (a, x) { return a.concat(x.resolvedFactories); }, [])
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60 | .reduce(function (a, r) { return a.concat(r.dependencies); }, [])
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61 | .forEach(function (d) { return resolver(d.key.token); });
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62 | }
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63 | for (var _a = 0, inputs_1 = inputs; _a < inputs_1.length; _a++) {
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64 | var input = inputs_1[_a];
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65 | resolver(input);
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66 | }
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67 | return Array.from(deps);
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68 | }
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69 | //# sourceMappingURL=resolve_dependencies.js.map |
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