@tldraw/store/dist-esm/lib/RecordsDiff.mjs.map

tldraw infinite canvas SDK (store).

{
  "version": 3,
  "sources": ["../../src/lib/RecordsDiff.ts"],
  "sourcesContent": ["import { objectMapEntries } from '@tldraw/utils'\nimport { IdOf, UnknownRecord } from './BaseRecord'\n\n/**\n * A diff describing the changes to a record.\n *\n * @public\n */\nexport interface RecordsDiff<R extends UnknownRecord> {\n\tadded: Record<IdOf<R>, R>\n\tupdated: Record<IdOf<R>, [from: R, to: R]>\n\tremoved: Record<IdOf<R>, R>\n}\n\n/** @internal */\nexport function createEmptyRecordsDiff<R extends UnknownRecord>(): RecordsDiff<R> {\n\treturn { added: {}, updated: {}, removed: {} } as RecordsDiff<R>\n}\n\n/** @public */\nexport function reverseRecordsDiff(diff: RecordsDiff<any>) {\n\tconst result: RecordsDiff<any> = { added: diff.removed, removed: diff.added, updated: {} }\n\tfor (const [from, to] of Object.values(diff.updated)) {\n\t\tresult.updated[from.id] = [to, from]\n\t}\n\treturn result\n}\n\n/**\n * Is a records diff empty?\n * @internal\n */\nexport function isRecordsDiffEmpty<T extends UnknownRecord>(diff: RecordsDiff<T>) {\n\treturn (\n\t\tObject.keys(diff.added).length === 0 &&\n\t\tObject.keys(diff.updated).length === 0 &&\n\t\tObject.keys(diff.removed).length === 0\n\t)\n}\n\n/**\n * Squash a collection of diffs into a single diff.\n *\n * @param diffs - An array of diffs to squash.\n * @returns A single diff that represents the squashed diffs.\n * @public\n */\nexport function squashRecordDiffs<T extends UnknownRecord>(\n\tdiffs: RecordsDiff<T>[]\n): RecordsDiff<T> {\n\tconst result = { added: {}, removed: {}, updated: {} } as RecordsDiff<T>\n\n\tsquashRecordDiffsMutable(result, diffs)\n\treturn result\n}\n\n/**\n * Apply the array `diffs` to the `target` diff, mutating it in-place.\n * @internal\n */\nexport function squashRecordDiffsMutable<T extends UnknownRecord>(\n\ttarget: RecordsDiff<T>,\n\tdiffs: RecordsDiff<T>[]\n): void {\n\tfor (const diff of diffs) {\n\t\tfor (const [id, value] of objectMapEntries(diff.added)) {\n\t\t\tif (target.removed[id]) {\n\t\t\t\tconst original = target.removed[id]\n\t\t\t\tdelete target.removed[id]\n\t\t\t\tif (original !== value) {\n\t\t\t\t\ttarget.updated[id] = [original, value]\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\ttarget.added[id] = value\n\t\t\t}\n\t\t}\n\n\t\tfor (const [id, [_from, to]] of objectMapEntries(diff.updated)) {\n\t\t\tif (target.added[id]) {\n\t\t\t\ttarget.added[id] = to\n\t\t\t\tdelete target.updated[id]\n\t\t\t\tdelete target.removed[id]\n\t\t\t\tcontinue\n\t\t\t}\n\t\t\tif (target.updated[id]) {\n\t\t\t\ttarget.updated[id] = [target.updated[id][0], to]\n\t\t\t\tdelete target.removed[id]\n\t\t\t\tcontinue\n\t\t\t}\n\n\t\t\ttarget.updated[id] = diff.updated[id]\n\t\t\tdelete target.removed[id]\n\t\t}\n\n\t\tfor (const [id, value] of objectMapEntries(diff.removed)) {\n\t\t\t// the same record was added in this diff sequence, just drop it\n\t\t\tif (target.added[id]) {\n\t\t\t\tdelete target.added[id]\n\t\t\t} else if (target.updated[id]) {\n\t\t\t\ttarget.removed[id] = target.updated[id][0]\n\t\t\t\tdelete target.updated[id]\n\t\t\t} else {\n\t\t\t\ttarget.removed[id] = value\n\t\t\t}\n\t\t}\n\t}\n}\n"],
  "mappings": "AAAA,SAAS,wBAAwB;AAe1B,SAAS,yBAAkE;AACjF,SAAO,EAAE,OAAO,CAAC,GAAG,SAAS,CAAC,GAAG,SAAS,CAAC,EAAE;AAC9C;AAGO,SAAS,mBAAmB,MAAwB;AAC1D,QAAM,SAA2B,EAAE,OAAO,KAAK,SAAS,SAAS,KAAK,OAAO,SAAS,CAAC,EAAE;AACzF,aAAW,CAAC,MAAM,EAAE,KAAK,OAAO,OAAO,KAAK,OAAO,GAAG;AACrD,WAAO,QAAQ,KAAK,EAAE,IAAI,CAAC,IAAI,IAAI;AAAA,EACpC;AACA,SAAO;AACR;AAMO,SAAS,mBAA4C,MAAsB;AACjF,SACC,OAAO,KAAK,KAAK,KAAK,EAAE,WAAW,KACnC,OAAO,KAAK,KAAK,OAAO,EAAE,WAAW,KACrC,OAAO,KAAK,KAAK,OAAO,EAAE,WAAW;AAEvC;AASO,SAAS,kBACf,OACiB;AACjB,QAAM,SAAS,EAAE,OAAO,CAAC,GAAG,SAAS,CAAC,GAAG,SAAS,CAAC,EAAE;AAErD,2BAAyB,QAAQ,KAAK;AACtC,SAAO;AACR;AAMO,SAAS,yBACf,QACA,OACO;AACP,aAAW,QAAQ,OAAO;AACzB,eAAW,CAAC,IAAI,KAAK,KAAK,iBAAiB,KAAK,KAAK,GAAG;AACvD,UAAI,OAAO,QAAQ,EAAE,GAAG;AACvB,cAAM,WAAW,OAAO,QAAQ,EAAE;AAClC,eAAO,OAAO,QAAQ,EAAE;AACxB,YAAI,aAAa,OAAO;AACvB,iBAAO,QAAQ,EAAE,IAAI,CAAC,UAAU,KAAK;AAAA,QACtC;AAAA,MACD,OAAO;AACN,eAAO,MAAM,EAAE,IAAI;AAAA,MACpB;AAAA,IACD;AAEA,eAAW,CAAC,IAAI,CAAC,OAAO,EAAE,CAAC,KAAK,iBAAiB,KAAK,OAAO,GAAG;AAC/D,UAAI,OAAO,MAAM,EAAE,GAAG;AACrB,eAAO,MAAM,EAAE,IAAI;AACnB,eAAO,OAAO,QAAQ,EAAE;AACxB,eAAO,OAAO,QAAQ,EAAE;AACxB;AAAA,MACD;AACA,UAAI,OAAO,QAAQ,EAAE,GAAG;AACvB,eAAO,QAAQ,EAAE,IAAI,CAAC,OAAO,QAAQ,EAAE,EAAE,CAAC,GAAG,EAAE;AAC/C,eAAO,OAAO,QAAQ,EAAE;AACxB;AAAA,MACD;AAEA,aAAO,QAAQ,EAAE,IAAI,KAAK,QAAQ,EAAE;AACpC,aAAO,OAAO,QAAQ,EAAE;AAAA,IACzB;AAEA,eAAW,CAAC,IAAI,KAAK,KAAK,iBAAiB,KAAK,OAAO,GAAG;AAEzD,UAAI,OAAO,MAAM,EAAE,GAAG;AACrB,eAAO,OAAO,MAAM,EAAE;AAAA,MACvB,WAAW,OAAO,QAAQ,EAAE,GAAG;AAC9B,eAAO,QAAQ,EAAE,IAAI,OAAO,QAAQ,EAAE,EAAE,CAAC;AACzC,eAAO,OAAO,QAAQ,EAAE;AAAA,MACzB,OAAO;AACN,eAAO,QAAQ,EAAE,IAAI;AAAA,MACtB;AAAA,IACD;AAAA,EACD;AACD;",
  "names": []
}