| 1 | export class Patch {
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| 2 | }
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| 3 | Patch.toPatchSet = (forward, backward) => {
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| 4 | return {
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| 5 | prev: backward ? toPatches(backward) : [],
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| 6 | next: forward ? toPatches(forward) : [],
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| 7 | };
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| 8 | };
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| 9 | Patch.isEmpty = (input) => {
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| 10 | if (input === null || typeof input !== 'object') {
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| 11 | return true;
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| 12 | }
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| 13 | else {
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| 14 | const isEmptyArray = (input) => (Array.isArray(input) ? input.length === 0 : true);
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| 15 | return isEmptyArray(input.prev) && isEmptyArray(input.next);
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| 16 | }
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| 17 | };
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| 18 | const toPatch = (input) => {
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| 19 | const hasForwardSlash = input.path.some((part) => {
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| 20 | return typeof part === 'string' ? part.includes('/') : false;
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| 21 | });
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| 22 | if (hasForwardSlash) {
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| 23 | const path = input.path
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| 24 | .map((part) => (typeof part === 'string' ? `'${part}'` : part))
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| 25 | .join(',');
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| 26 | const err = `Property names cannot contain the "/" character. op: '${input.op}' path: [${path}]`;
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| 27 | throw new Error(err);
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| 28 | }
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| 29 | return Object.assign(Object.assign({}, input), { path: input.path.join('/') });
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| 30 | };
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| 31 | const toPatches = (input) => {
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| 32 | const patches = Array.isArray(input) ? input : [input];
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| 33 | return patches.filter((p) => Boolean(p)).map((p) => toPatch(p));
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| 34 | };
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