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/** |
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* Shared write-back: apply sanitized server values only if the user has not typed past them. |
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*/ |
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|
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/** |
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* @param {Object} opts |
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* @param {Function} opts.getBlock |
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* @param {Function} opts.updateBlockAttributes |
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* @param {Function} [opts.markNonPersistent] |
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* @returns {Function} `(clientId) => (sanitizedDiff, sentPatch) => void` |
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*/ |
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export function makeWriteBackHandler( { getBlock, updateBlockAttributes, markNonPersistent } ) { |
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return ( clientId ) => ( sanitizedDiff, sentPatch ) => { |
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const current = getBlock( clientId ); |
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if ( ! current || ! current.attributes ) return; |
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|
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const safeUpdates = {}; |
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for ( const k of Object.keys( sanitizedDiff ) ) { |
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// Apply only if the block's value still equals what we sent — |
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// protects in-progress typing. |
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// When sentPatch doesn't include the key (server volunteered it, |
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// e.g. auto-gen), we require the block's current value to still |
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// be empty so we never clobber explicit input. |
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if ( sentPatch[ k ] !== undefined ) { |
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if ( current.attributes[ k ] === sentPatch[ k ] ) { |
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safeUpdates[ k ] = sanitizedDiff[ k ]; |
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} |
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} else if ( ! current.attributes[ k ] ) { |
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safeUpdates[ k ] = sanitizedDiff[ k ]; |
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} |
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} |
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|
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if ( Object.keys( safeUpdates ).length === 0 ) return; |
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|
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if ( typeof markNonPersistent === 'function' ) markNonPersistent(); |
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updateBlockAttributes( clientId, safeUpdates ); |
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}; |
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} |
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|
