@abaplint/runtime/build/src/abap_eventing.js

Transpiler - Runtime

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.ABAPEventing = void 0;
class ABAPEventing {
    registrations = {};
    setHandler(event, methods, forObject, activation) {
        if (methods.length === 0) {
            throw new Error("ABAPEventing.setHandler: no methods provided");
        }
        if (!this.registrations[event.EVENT_CLASS]) {
            this.registrations[event.EVENT_CLASS] = {};
        }
        if (!this.registrations[event.EVENT_CLASS][event.EVENT_NAME]) {
            this.registrations[event.EVENT_CLASS][event.EVENT_NAME] = [];
        }
        const ref = forObject === "ALL" ? "ALL" : new WeakRef(forObject);
        const handlers = this.registrations[event.EVENT_CLASS][event.EVENT_NAME];
        if (activation === true) {
            // todo: tackle duplicates
            handlers.push({
                handlers: methods,
                forObject: ref,
            });
        }
        else {
            if (methods.length > 1) {
                throw new Error("ABAPEventing.setHandler: deactivation of multiple methods not supported, todo");
            }
            // todo: comparing the functions via toString might give the wrong result
            const index = handlers.findIndex(handler => handler.forObject === ref && handler.handlers[0].toString() === methods[0].toString());
            if (index !== -1) {
                handlers.splice(index, 1);
            }
        }
    }
    // todo: cleanup of dead WeakRefs
    async raiseEvent(event, me, parameters) {
        const handlers = this.registrations[event.EVENT_CLASS]?.[event.EVENT_NAME];
        if (handlers === undefined) {
            return;
        }
        for (const handler of handlers) {
            if (handler.forObject === "ALL") {
                for (const method of handler.handlers) {
                    await method(parameters);
                }
            }
            else if (handler.forObject.deref() === me) {
                for (const method of handler.handlers) {
                    await method(parameters);
                }
            }
        }
    }
}
exports.ABAPEventing = ABAPEventing;
//# sourceMappingURL=abap_eventing.js.map