Function addAllResolvedFromOutputs

dash/dash-renderer/src/actions/dependencies.js:1161–1211

(
    resolve,
    paths,
    matches,
    triggerAnyVals = ''
)

}

export function addAllResolvedFromOutputs(
    resolve,
    paths,
    matches,
    triggerAnyVals = ''
) {
    return callback => {
        const {matchKeys, firstSingleOutput, outputs} = callback;
        if (matchKeys.length) {
            const singleOutPattern = outputs[firstSingleOutput];
            if (singleOutPattern) {
                addResolvedFromOutputs(
                    callback,
                    singleOutPattern,
                    resolve(paths)(singleOutPattern),
                    matches
                );
            } else {
                /*
                 * If every output has ALL we need to reduce resolved set
                 * to one item per combination of MATCH values.
                 * That will give one result per callback invocation.
                 */
                const anySeen = {};
                outputs.forEach(outPattern => {
                    const outSet = resolve(paths)(outPattern).filter(i => {
                        const matchStr = JSON.stringify(props(matchKeys, i.id));
                        if (!anySeen[matchStr]) {
                            anySeen[matchStr] = 1;
                            return true;
                        }
                        return false;
                    });
                    addResolvedFromOutputs(
                        callback,
                        outPattern,
                        outSet,
                        matches
                    );
                });
            }
        } else {
            // Outputs have no MATCH keys (fixed-id outputs or no output).
            // Fall back to the triggering input's MATCH values so that
            // separate MATCH triggers produce distinct resolvedIds and
            // aren't deduplicated into a single firing. See issue #2462.
            const cb = makeResolvedCallback(callback, resolve, triggerAnyVals);
            matches.push(cb);
        }
    };
}

/*
 * For a given id and prop find all callbacks it's an input of.