| 54 | }; |
| 55 | |
| 56 | const mapArraysDiff = (source, diff) => { |
| 57 | const sequence = []; |
| 58 | let sourceIndex = 0; |
| 59 | for (let i = 0; i < diff.length; i++) { |
| 60 | const it = diff[i]; |
| 61 | if (it.length === 1) { |
| 62 | sequence.push({ type: 'same', value: source[sourceIndex] }); |
| 63 | sourceIndex += 1; |
| 64 | } else { |
| 65 | if (it[0] === '-') { |
| 66 | sequence.push({ type: 'removed', value: it[1] }); |
| 67 | } else { |
| 68 | sequence.push({ type: 'added', value: it[1], before: '' }); |
| 69 | } |
| 70 | } |
| 71 | } |
| 72 | const result = sequence.reverse().reduce( |
| 73 | (acc, it) => { |
| 74 | if (it.type === 'same') { |
| 75 | acc.prev = it.value; |
| 76 | } |
| 77 | |
| 78 | if (it.type === 'added' && acc.prev) { |
| 79 | it.before = acc.prev; |
| 80 | } |
| 81 | acc.result.push(it); |
| 82 | return acc; |
| 83 | }, |
| 84 | { result: [] }, |
| 85 | ); |
| 86 | |
| 87 | return result.result.reverse(); |
| 88 | }; |
| 89 | |
| 90 | export function diffSchemasOrTables(left, right) { |
| 91 | left = JSON.parse(JSON.stringify(left)); |