/**
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* Reduces one or more LDS errors into a string[] of error messages.
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* @param {FetchResponse|FetchResponse[]} errors
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* @return {String[]} Error messages
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*/
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export function reduceErrors(errors) {
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return (
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// ensure errors is an array
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[]
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.concat(errors)
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// Remove null/undefined items
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.filter((error) => !!error)
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// Extract an error message
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.map((error) => {
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// UI API read errors
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if (Array.isArray(error.body)) {
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return error.body.map((e) => e.message);
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}
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// UI API DML, Apex and network errors
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else if (error.body && typeof error.body.message === 'string') {
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return error.body.message;
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}
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// JS errors
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else if (typeof error.message === 'string') {
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return error.message;
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}
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// Unknown error shape so try HTTP status text
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return error.statusText;
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})
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// Flatten
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.reduce((prev, curr) => prev.concat(curr), [])
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// Remove empty strings
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.filter((message) => !!message)
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);
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}
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