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collection-subject.ts
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collection-subject.ts
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import Collection from "../../chip-types/collection";
import * as Errors from "../../response/errors";
import Subject from "../subject";
import Context from "../../context";
import SingleResource from "./single-resource-subject";
import { ResourceCreated } from "../../../common_lib/response/responses";
import { LooseObject } from "../types";
import {
CreateActionName,
ShowActionName,
DeleteActionName,
} from "../../action";
import { ItemFields } from "../../chip-types/collection-item-body";
//
//
//
//
// !!! many of these methods should be moved to the collection
// !!! class, this should be a lightweight controller
//
//
//
//
export default class CollectionSubject extends Subject {
collection: Collection;
named_filters: Array<string>;
ids: Array<string>;
getName() {
return "Collection";
}
constructor(
collection: Collection,
named_filters: Array<string> = [],
ids: Array<string> = []
) {
super(collection.app);
this.collection = collection;
this.named_filters = named_filters;
this.ids = ids;
}
async performAction(
context: Context,
action_name: CreateActionName | ShowActionName | DeleteActionName,
params: any
) {
switch (action_name) {
case "create":
return this.createResource(context, params);
case "show":
return this.listResources(context, params);
case "delete":
return this.delete();
default:
throw new Errors.DeveloperError(
`Unknown action for '${this.collection.name}' collection: '${action_name}'`
);
}
}
delete() {
throw new Errors.NotFound("Cannot delete a collection.");
}
async getChildSubject(path_element: string | Array<string>) {
if (path_element[0] === "@") {
return new CollectionSubject(this.collection, [
...this.named_filters,
path_element.slice(1) as string,
]);
} else if (path_element instanceof Array) {
const ids = path_element;
return new CollectionSubject(this.collection, [], ids);
}
const resource_id = path_element;
return new SingleResource(this.app, this.collection, resource_id);
}
async listResources(context: Context, params: LooseObject) {
this.app.Logger.debug2(
"SUBJECT",
`Running listResources on ${this.collection.name}`,
params
);
const list = this.collection.list(context).setParams(params);
for (const named_filter of this.named_filters) {
list.namedFilter(named_filter);
}
const ret = await list.fetch();
this.app.Logger.debug("SUBJECT", "listResources returning", ret);
return ret;
}
async createResource(context: Context, body: ItemFields<any>) {
this.app.Logger.debug2(
"SUBJECT",
`Running createResource on ${this.collection.name}`,
body
);
const item = this.collection.make();
item.setMultiple(body);
await item.save(context);
await item.decode(context);
return new ResourceCreated(item);
}
}

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