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event-matchers.ts
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event-matchers.ts
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import { ActionName } from "../action";
import assert from "assert";
export type When = "before" | "after";
export type MatcherParams = {
when: When;
subject_path: RegExp;
action: ActionName | ActionName[];
};
export class EventMatcher {
when: When;
subject_path: RegExp;
actions: ActionName[];
collection_name: null | string;
constructor({ when, subject_path = /.*/, action }: MatcherParams) {
if (arguments[0] instanceof EventMatcher) {
return arguments[0];
}
assert.equal(typeof when, "string");
assert(subject_path instanceof RegExp);
assert(typeof action === "string" || Array.isArray(action));
this.when = when;
this.subject_path = subject_path;
if (Array.isArray(action)) {
this.actions = action;
} else {
this.actions = [action];
}
}
containsAction(action_name: ActionName) {
return this.actions.includes(action_name);
}
}
export class Collection extends EventMatcher {
collection_name: string;
constructor({
when,
collection_name,
action,
}: Pick<MatcherParams, "when" | "action"> & { collection_name: string }) {
super({
when,
subject_path: new RegExp(`collections.${collection_name}`),
action,
});
assert.equal(typeof collection_name, "string");
this.collection_name = collection_name;
}
}
export class Resource extends EventMatcher {
collection_name: string;
constructor({
when,
collection_name,
action,
}: Pick<MatcherParams, "when" | "action"> & { collection_name: string }) {
super({
when,
subject_path: new RegExp(`collections.${collection_name}\\..*`),
action,
});
assert.equal(typeof collection_name, "string");
this.collection_name = collection_name;
}
}

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