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refactor apply operation to account for arrays (#38)

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* refactor apply operation to account for arrays

* fix buig
This commit is contained in:
Matt Hill
2022-06-29 17:43:12 -06:00
committed by GitHub
parent d24bd1c513
commit ec35e5f14c
1 changed files with 31 additions and 7 deletions
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36
client/lib/json-patch-lib.ts
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@@ -39,7 +39,7 @@ export function applyOperation<T> (
const add = { op: PatchOp.ADD, path, value: current} as const
const replace = { op: PatchOp.REPLACE, path, value: current } as const
doc.data = recursiveApply(doc.data, jsonPathToKeyArray(path), value)
doc.data = recursiveApply(doc.data, jsonPathToKeyArray(path), op, value)
switch (op) {
case PatchOp.REMOVE:
@@ -54,14 +54,22 @@ export function applyOperation<T> (
}
}
function recursiveApply<T extends Record<string, T>> (data: T, path: readonly string[], value?: any): T {
function recursiveApply<T extends Record<string, any> | any[]> (data: T, path: readonly string[], op: PatchOp, value?: any): T {
if (!path.length) return value
if (!isObject(data)) {
throw Error('Patch cannot be applied. Path contains non object')
// object
if (isObject(data)) {
return recursiveApplyObject(data, path, op, value)
// array
} else if (Array.isArray(data)) {
return recursiveApplyArray(data, path, op, value)
} else {
throw 'unreachable'
}
}
const updated = recursiveApply(data[path[0]], path.slice(1), value)
function recursiveApplyObject<T extends Record<string, any>> (data: T, path: readonly string[], op: PatchOp, value?: any): T {
const updated = recursiveApply(data[path[0]], path.slice(1), op, value)
const result = {
...data,
[path[0]]: updated,
@@ -74,8 +82,24 @@ function recursiveApply<T extends Record<string, T>> (data: T, path: readonly st
return result
}
function recursiveApplyArray<T extends any[]> (data: T, path: readonly string[], op: PatchOp, value?: any): T {
const index = parseInt(path[0])
const updated = recursiveApply(data[index], path.slice(1), op, value)
const result = [...data] as T
if (op === PatchOp.ADD) {
result.splice(index, 0, updated)
} else if (op === PatchOp.REPLACE) {
result.splice(index, 1, updated)
} else {
result.splice(index, 1)
}
return result
}
function isObject (val: any): val is Record<string, unknown> {
return typeof val === 'object' && val !== null
return typeof val === 'object' && val !== null && !Array.isArray(val)
}
function jsonPathToKeyArray (path: string): string[] {