@spartacus/core
Version:
Spartacus - the core framework
34 lines • 6.12 kB
JavaScript
/**
* Helper logic to resolve best matching Applicable
*
* Finding best match is a two step process:
* 1. Find all matching applicables
* - all applicables for which hasMatch(...matchParams) will return true
* - all applicables without hasMatch method (implicit always match)
* 2. Find the applicable with highest priority
* - applicable with highest getPriority(...priorityParams) will win
* - applicable without getPriority method is treated as Priority.NORMAL or 0
* - applicables with the same priority are sorted by order of providers, the applicable that was provided later wins
*
* @param applicables - array or applicable-like instances
* @param matchParams - array of parameters passed for hasMatch calls
* @param priorityParams - array of parameters passed for getPriority calls
*/
export function resolveApplicable(applicables, matchParams = [], priorityParams = []) {
const matchedApplicables = (applicables !== null && applicables !== void 0 ? applicables : []).filter((applicable) => !applicable.hasMatch || applicable.hasMatch(...matchParams));
if (matchedApplicables.length < 2) {
return matchedApplicables[0];
}
let lastPriority = -Infinity;
return matchedApplicables.reduce((acc, curr) => {
const currPriority = curr.getPriority
? curr.getPriority(...priorityParams)
: 0 /* NORMAL */;
if (lastPriority > currPriority) {
return acc;
}
lastPriority = currPriority;
return curr;
}, undefined);
}
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