@tanstack/optimistic/dist/cjs/proxy.cjs.map

Core optimistic updates library

{"version":3,"file":"proxy.cjs","sources":["../../src/proxy.ts"],"sourcesContent":["/**\n * A utility for creating a proxy that captures changes to an object\n * and provides a way to retrieve those changes.\n */\n\n/**\n * Simple debug utility that only logs when debug mode is enabled\n * Set DEBUG to true in localStorage to enable debug logging\n */\nfunction debugLog(...args: Array<unknown>): void {\n  // Check if we're in a browser environment\n  const isBrowser =\n    typeof window !== `undefined` && typeof localStorage !== `undefined`\n\n  // In browser, check localStorage for debug flag\n  if (isBrowser && localStorage.getItem(`DEBUG`) === `true`) {\n    console.log(`[proxy]`, ...args)\n  }\n  // In Node.js environment, check for environment variable (though this is primarily for browser)\n  else if (\n    !isBrowser &&\n    typeof process !== `undefined` &&\n    process.env.DEBUG === `true`\n  ) {\n    console.log(`[proxy]`, ...args)\n  }\n}\n\n// Add TypedArray interface with proper type\ninterface TypedArray {\n  length: number\n  [index: number]: number\n}\n\n// Update type for ChangeTracker\ninterface ChangeTracker<T extends object> {\n  changes: Record<string | symbol, unknown>\n  originalObject: T\n  modified: boolean\n  copy_?: T\n  assigned_: Record<string | symbol, boolean>\n  parent?: {\n    tracker: ChangeTracker<object>\n    prop: string | symbol\n  }\n  target: T\n}\n\n/**\n * Deep clones an object while preserving special types like Date and RegExp\n */\n\nfunction deepClone<T extends unknown>(\n  obj: T,\n  visited = new WeakMap<object, unknown>()\n): T {\n  // Handle null and undefined\n  if (obj === null || obj === undefined) {\n    return obj\n  }\n\n  // Handle primitive types\n  if (typeof obj !== `object`) {\n    return obj\n  }\n\n  // If we've already cloned this object, return the cached clone\n  if (visited.has(obj as object)) {\n    return visited.get(obj as object) as T\n  }\n\n  if (obj instanceof Date) {\n    return new Date(obj.getTime()) as unknown as T\n  }\n\n  if (obj instanceof RegExp) {\n    return new RegExp(obj.source, obj.flags) as unknown as T\n  }\n\n  if (Array.isArray(obj)) {\n    const arrayClone = [] as Array<unknown>\n    visited.set(obj as object, arrayClone)\n    obj.forEach((item, index) => {\n      arrayClone[index] = deepClone(item, visited)\n    })\n    return arrayClone as unknown as T\n  }\n\n  // Handle TypedArrays\n  if (ArrayBuffer.isView(obj) && !(obj instanceof DataView)) {\n    // Get the constructor to create a new instance of the same type\n    const TypedArrayConstructor = Object.getPrototypeOf(obj).constructor\n    const clone = new TypedArrayConstructor(\n      (obj as unknown as TypedArray).length\n    ) as unknown as TypedArray\n    visited.set(obj as object, clone)\n\n    // Copy the values\n    for (let i = 0; i < (obj as unknown as TypedArray).length; i++) {\n      clone[i] = (obj as unknown as TypedArray)[i]!\n    }\n\n    return clone as unknown as T\n  }\n\n  if (obj instanceof Map) {\n    const clone = new Map() as Map<unknown, unknown>\n    visited.set(obj as object, clone)\n    obj.forEach((value, key) => {\n      clone.set(key, deepClone(value, visited))\n    })\n    return clone as unknown as T\n  }\n\n  if (obj instanceof Set) {\n    const clone = new Set()\n    visited.set(obj as object, clone)\n    obj.forEach((value) => {\n      clone.add(deepClone(value, visited))\n    })\n    return clone as unknown as T\n  }\n\n  const clone = {} as Record<string | symbol, unknown>\n  visited.set(obj as object, clone)\n\n  for (const key in obj) {\n    if (Object.prototype.hasOwnProperty.call(obj, key)) {\n      clone[key] = deepClone(\n        (obj as Record<string | symbol, unknown>)[key],\n        visited\n      )\n    }\n  }\n\n  const symbolProps = Object.getOwnPropertySymbols(obj)\n  for (const sym of symbolProps) {\n    clone[sym] = deepClone(\n      (obj as Record<string | symbol, unknown>)[sym],\n      visited\n    )\n  }\n\n  return clone as T\n}\n\n/**\n * Deep equality check that handles special types like Date, RegExp, Map, and Set\n */\nfunction deepEqual<T>(a: T, b: T): boolean {\n  // Handle primitive types\n  if (a === b) return true\n\n  // If either is null or not an object, they're not equal\n  if (\n    a === null ||\n    b === null ||\n    typeof a !== `object` ||\n    typeof b !== `object`\n  ) {\n    return false\n  }\n\n  // Handle Date objects\n  if (a instanceof Date && b instanceof Date) {\n    return a.getTime() === b.getTime()\n  }\n\n  // Handle RegExp objects\n  if (a instanceof RegExp && b instanceof RegExp) {\n    return a.source === b.source && a.flags === b.flags\n  }\n\n  // Handle Map objects\n  if (a instanceof Map && b instanceof Map) {\n    if (a.size !== b.size) return false\n\n    const entries = Array.from(a.entries())\n    for (const [key, val] of entries) {\n      if (!b.has(key) || !deepEqual(val, b.get(key))) {\n        return false\n      }\n    }\n\n    return true\n  }\n\n  // Handle Set objects\n  if (a instanceof Set && b instanceof Set) {\n    if (a.size !== b.size) return false\n\n    // Convert to arrays for comparison\n    const aValues = Array.from(a)\n    const bValues = Array.from(b)\n\n    // Simple comparison for primitive values\n    if (aValues.every((val) => typeof val !== `object`)) {\n      return aValues.every((val) => b.has(val))\n    }\n\n    // For objects in sets, we need to do a more complex comparison\n    // This is a simplified approach and may not work for all cases\n    return aValues.length === bValues.length\n  }\n\n  // Handle arrays\n  if (Array.isArray(a) && Array.isArray(b)) {\n    if (a.length !== b.length) return false\n\n    for (let i = 0; i < a.length; i++) {\n      if (!deepEqual(a[i], b[i])) return false\n    }\n\n    return true\n  }\n\n  // Handle TypedArrays\n  if (\n    ArrayBuffer.isView(a) &&\n    ArrayBuffer.isView(b) &&\n    !(a instanceof DataView) &&\n    !(b instanceof DataView)\n  ) {\n    const typedA = a as unknown as TypedArray\n    const typedB = b as unknown as TypedArray\n    if (typedA.length !== typedB.length) return false\n\n    for (let i = 0; i < typedA.length; i++) {\n      if (typedA[i] !== typedB[i]) return false\n    }\n\n    return true\n  }\n\n  // Handle plain objects\n  const keysA = Object.keys(a as object)\n  const keysB = Object.keys(b as object)\n\n  if (keysA.length !== keysB.length) return false\n\n  return keysA.every(\n    (key) =>\n      Object.prototype.hasOwnProperty.call(b, key) &&\n      deepEqual((a as any)[key], (b as any)[key])\n  )\n}\n\n/**\n * Creates a proxy that tracks changes to the target object\n *\n * @param target The object to proxy\n * @param parent Optional parent information\n * @returns An object containing the proxy and a function to get the changes\n */\nexport function createChangeProxy<T extends object>(\n  target: T,\n  parent?: { tracker: ChangeTracker<object>; prop: string | symbol }\n): {\n  proxy: T\n\n  getChanges: () => Record<string | symbol, any>\n} {\n  // Create a WeakMap to cache proxies for nested objects\n  // This prevents creating multiple proxies for the same object\n  // and handles circular references\n  const proxyCache = new WeakMap<object, object>()\n\n  // Create a change tracker to track changes to the object\n  const changeTracker: ChangeTracker<T> = {\n    changes: {},\n    originalObject: deepClone(target), // Create a deep clone to preserve the original state\n    modified: false,\n    assigned_: {},\n    parent,\n    target, // Store reference to the target object\n  }\n\n  // Mark this object and all its ancestors as modified\n  function markChanged(state: ChangeTracker<object>) {\n    if (!state.modified) {\n      state.modified = true\n\n      // Propagate the change up the parent chain\n      if (state.parent) {\n        markChanged(state.parent.tracker)\n      }\n    }\n  }\n\n  // Check if all properties in the current state have reverted to original values\n  function checkIfReverted(state: ChangeTracker<object>): boolean {\n    debugLog(\n      `checkIfReverted called with assigned keys:`,\n      Object.keys(state.assigned_)\n    )\n\n    // If there are no assigned properties, object is unchanged\n    if (\n      Object.keys(state.assigned_).length === 0 &&\n      Object.getOwnPropertySymbols(state.assigned_).length === 0\n    ) {\n      debugLog(`No assigned properties, returning true`)\n      return true\n    }\n\n    // Check each assigned regular property\n    for (const prop in state.assigned_) {\n      // If this property is marked as assigned\n      if (state.assigned_[prop] === true) {\n        const currentValue = state.copy_ ? (state.copy_ as any)[prop] : null\n        const originalValue = (state.originalObject as any)[prop]\n\n        debugLog(\n          `Checking property ${String(prop)}, current:`,\n          currentValue,\n          `original:`,\n          originalValue\n        )\n\n        // If the value is not equal to original, something is still changed\n        if (!deepEqual(currentValue, originalValue)) {\n          debugLog(`Property ${String(prop)} is different, returning false`)\n          return false\n        }\n      } else if (state.assigned_[prop] === false) {\n        // Property was deleted, so it's different from original\n        debugLog(`Property ${String(prop)} was deleted, returning false`)\n        return false\n      }\n    }\n\n    // Check each assigned symbol property\n    const symbolProps = Object.getOwnPropertySymbols(state.assigned_)\n    for (const sym of symbolProps) {\n      if (state.assigned_[sym.toString()] === true) {\n        const currentValue = state.copy_ ? (state.copy_ as any)[sym] : null\n        const originalValue = (state.originalObject as any)[sym]\n\n        // If the value is not equal to original, something is still changed\n        if (!deepEqual(currentValue, originalValue)) {\n          debugLog(`Symbol property is different, returning false`)\n          return false\n        }\n      } else if (state.assigned_[sym.toString()] === false) {\n        // Property was deleted, so it's different from original\n        debugLog(`Symbol property was deleted, returning false`)\n        return false\n      }\n    }\n\n    debugLog(`All properties match original values, returning true`)\n    // All assigned properties match their original values\n    return true\n  }\n\n  // Recursively check and update modified status based on child objects\n  function updateModifiedStatus(state: ChangeTracker<object>): boolean {\n    debugLog(\n      `updateModifiedStatus called, assigned keys:`,\n      Object.keys(state.assigned_)\n    )\n\n    // Only check for reverts if we actually have changes\n    if (\n      Object.keys(state.assigned_).length === 0 &&\n      Object.getOwnPropertySymbols(state.assigned_).length === 0\n    ) {\n      debugLog(`No assigned properties, returning false`)\n      return false\n    }\n\n    // If this object has direct changes that aren't reverted, it's modified\n    const isReverted = checkIfReverted(state)\n    debugLog(`checkIfReverted returned:`, isReverted)\n\n    if (!isReverted) {\n      debugLog(`Object has changes that aren't reverted, returning true`)\n      return true\n    }\n\n    debugLog(`All changes reverted, clearing tracking`)\n    // All changes have been reverted, clear the tracking\n    state.modified = false\n    state.changes = {}\n    state.assigned_ = {}\n\n    // If we have a parent, update its status too\n    if (state.parent) {\n      debugLog(`Checking parent status for prop:`, state.parent.prop)\n      // Tell the parent this child has reverted\n      checkParentStatus(state.parent.tracker, state.parent.prop)\n    }\n\n    return false\n  }\n\n  // Update parent status based on child changes\n  function checkParentStatus(\n    parentState: ChangeTracker<object>,\n    childProp: string | symbol\n  ) {\n    debugLog(`checkParentStatus called for child prop:`, childProp)\n\n    // Check if all properties of the parent are reverted\n    const isReverted = checkIfReverted(parentState)\n    debugLog(`Parent checkIfReverted returned:`, isReverted)\n\n    if (isReverted) {\n      debugLog(`Parent is fully reverted, clearing tracking`)\n      // If everything is reverted, clear the tracking\n      parentState.modified = false\n      parentState.changes = {}\n      parentState.assigned_ = {}\n\n      // Continue up the chain\n      if (parentState.parent) {\n        debugLog(`Continuing up the parent chain`)\n        checkParentStatus(parentState.parent.tracker, parentState.parent.prop)\n      }\n    }\n  }\n\n  // Create a proxy for the target object\n  function createObjectProxy<TObj extends object>(obj: TObj): TObj {\n    // If we've already created a proxy for this object, return it\n    if (proxyCache.has(obj)) {\n      return proxyCache.get(obj) as TObj\n    }\n\n    // Create a proxy for the object\n    const proxy = new Proxy(obj, {\n      get(ptarget, prop) {\n        const value = ptarget[prop as keyof TObj]\n\n        // If it's a getter, return the value directly\n        const desc = Object.getOwnPropertyDescriptor(ptarget, prop)\n        if (desc?.get) {\n          return value\n        }\n\n        // If the value is a function, bind it to the ptarget\n        if (typeof value === `function`) {\n          // For Map and Set methods that modify the collection\n          if (ptarget instanceof Map || ptarget instanceof Set) {\n            const methodName = prop.toString()\n            const modifyingMethods = new Set([\n              `set`,\n              `delete`,\n              `clear`,\n              `add`,\n              `pop`,\n              `push`,\n              `shift`,\n              `unshift`,\n              `splice`,\n              `sort`,\n              `reverse`,\n            ])\n\n            if (modifyingMethods.has(methodName)) {\n              return function (...args: Array<unknown>) {\n                const result = value.apply(ptarget, args)\n                markChanged(changeTracker)\n                return result\n              }\n            }\n\n            // Handle iterator methods for Map and Set\n            const iteratorMethods = new Set([\n              `entries`,\n              `keys`,\n              `values`,\n              `forEach`,\n              Symbol.iterator,\n            ])\n\n            if (iteratorMethods.has(methodName) || prop === Symbol.iterator) {\n              return function (this: unknown, ...args: Array<unknown>) {\n                const result = value.apply(ptarget, args)\n\n                // For forEach, we need to wrap the callback to track changes\n                if (methodName === `forEach`) {\n                  const callback = args[0]\n                  if (typeof callback === `function`) {\n                    // Replace the original callback with our wrapped version\n                    const wrappedCallback = function (\n                      // eslint-disable-next-line\n                      this: unknown,\n                      // eslint-disable-next-line\n                      value: unknown,\n                      key: unknown,\n                      collection: unknown\n                    ) {\n                      // Call the original callback\n                      const cbresult = callback.call(\n                        this,\n                        value,\n                        key,\n                        collection\n                      )\n                      // Mark as changed since the callback might have modified the value\n                      markChanged(changeTracker)\n                      return cbresult\n                    }\n                    // Call forEach with our wrapped callback\n                    return value.apply(ptarget, [\n                      wrappedCallback,\n                      ...args.slice(1),\n                    ])\n                  }\n                }\n\n                // For iterators (entries, keys, values, Symbol.iterator)\n                if (\n                  methodName === `entries` ||\n                  methodName === `values` ||\n                  methodName === Symbol.iterator.toString() ||\n                  prop === Symbol.iterator\n                ) {\n                  // If it's an iterator, we need to wrap the returned iterator\n                  // to track changes when the values are accessed and potentially modified\n                  const originalIterator = result\n\n                  // Create a proxy for the iterator that will mark changes when next() is called\n                  return {\n                    next() {\n                      const nextResult = originalIterator.next()\n\n                      // If we have a value and it's an object, we need to track it\n                      if (\n                        !nextResult.done &&\n                        nextResult.value &&\n                        typeof nextResult.value === `object`\n                      ) {\n                        // For entries, the value is a [key, value] pair\n                        if (\n                          methodName === `entries` &&\n                          Array.isArray(nextResult.value) &&\n                          nextResult.value.length === 2\n                        ) {\n                          // The value is at index 1 in the [key, value] pair\n                          if (\n                            nextResult.value[1] &&\n                            typeof nextResult.value[1] === `object`\n                          ) {\n                            // Create a proxy for the value and replace it in the result\n                            const { proxy: valueProxy } = createChangeProxy(\n                              nextResult.value[1],\n                              {\n                                tracker: changeTracker,\n                                prop:\n                                  typeof nextResult.value[0] === `symbol`\n                                    ? nextResult.value[0]\n                                    : String(nextResult.value[0]),\n                              }\n                            )\n                            nextResult.value[1] = valueProxy\n                          }\n                        } else if (\n                          methodName === `values` ||\n                          methodName === Symbol.iterator.toString() ||\n                          prop === Symbol.iterator\n                        ) {\n                          // If the value is an object, create a proxy for it\n                          if (\n                            typeof nextResult.value === `object` &&\n                            nextResult.value !== null\n                          ) {\n                            // For Set, we need to track the whole object\n                            // For Map, we would need the key, but we don't have it here\n                            // So we'll use a symbol as a placeholder\n                            const tempKey = Symbol(`iterator-value`)\n                            const { proxy: valueProxy } = createChangeProxy(\n                              nextResult.value,\n                              {\n                                tracker: changeTracker,\n                                prop: tempKey,\n                              }\n                            )\n                            nextResult.value = valueProxy\n                          }\n                        }\n                      }\n\n                      return nextResult\n                    },\n                    [Symbol.iterator]() {\n                      return this\n                    },\n                  }\n                }\n\n                return result\n              }\n            }\n          }\n          return value.bind(ptarget)\n        }\n\n        // If the value is an object, create a proxy for it\n        if (\n          value &&\n          typeof value === `object` &&\n          !(value instanceof Date) &&\n          !(value instanceof RegExp)\n        ) {\n          // Create a parent reference for the nested object\n          const nestedParent = {\n            tracker: changeTracker,\n            prop: String(prop),\n          }\n\n          // Create a proxy for the nested object\n          const { proxy: nestedProxy } = createChangeProxy(value, nestedParent)\n\n          // Cache the proxy\n          proxyCache.set(value, nestedProxy)\n\n          return nestedProxy\n        }\n\n        return value\n      },\n\n      set(sobj, prop, value) {\n        const currentValue = sobj[prop as keyof TObj]\n        debugLog(\n          `set called for property ${String(prop)}, current:`,\n          currentValue,\n          `new:`,\n          value\n        )\n\n        // Special handling for array length changes\n        if (Array.isArray(sobj) && prop === `length`) {\n          const newLength = Number(value)\n          const oldLength = sobj.length\n\n          // Create a new array with the desired length\n          const newArray = Array.from({ length: newLength }, (_, i) =>\n            i < oldLength ? sobj[i] : undefined\n          )\n\n          // Track the change in the parent object since 'arr' is the property name\n          if (parent) {\n            parent.tracker.changes[parent.prop] = newArray\n            parent.tracker.assigned_[parent.prop] = true\n            markChanged(parent.tracker)\n          }\n\n          // Update the original array\n          sobj.length = newLength\n          return true\n        }\n\n        // Only track the change if the value is actually different\n        if (!deepEqual(currentValue, value)) {\n          // Check if the new value is equal to the original value\n          // Important: Use the originalObject to get the true original value\n          const originalValue = changeTracker.originalObject[prop as keyof T]\n          const isRevertToOriginal = deepEqual(value, originalValue)\n          debugLog(\n            `Value different, original:`,\n            originalValue,\n            `isRevertToOriginal:`,\n            isRevertToOriginal\n          )\n\n          if (isRevertToOriginal) {\n            debugLog(`Reverting property ${String(prop)} to original value`)\n            // If the value is reverted to its original state, remove it from changes\n            delete changeTracker.changes[prop.toString()]\n            delete changeTracker.assigned_[prop.toString()]\n\n            // Make sure the copy is updated with the original value\n            if (changeTracker.copy_) {\n              debugLog(`Updating copy with original value for ${String(prop)}`)\n              changeTracker.copy_[prop as keyof T] = deepClone(originalValue)\n            }\n\n            // Check if all properties in this object have been reverted\n            debugLog(`Checking if all properties reverted`)\n            const allReverted = checkIfReverted(changeTracker)\n            debugLog(`All reverted:`, allReverted)\n\n            if (allReverted) {\n              debugLog(`All properties reverted, clearing tracking`)\n              // If all have been reverted, clear tracking\n              changeTracker.modified = false\n              changeTracker.changes = {}\n              changeTracker.assigned_ = {}\n\n              // If we're a nested object, check if the parent needs updating\n              if (parent) {\n                debugLog(`Updating parent for property:`, parent.prop)\n                checkParentStatus(parent.tracker, parent.prop)\n              }\n            } else {\n              // Some properties are still changed\n              debugLog(`Some properties still changed, keeping modified flag`)\n              changeTracker.modified = true\n            }\n          } else {\n            debugLog(`Setting new value for property ${String(prop)}`)\n            // Create a copy of the object if it doesn't exist\n            prepareCopy(changeTracker)\n\n            // Set the value on the copy\n            if (changeTracker.copy_) {\n              changeTracker.copy_[prop as keyof T] = value\n            }\n\n            // Set the value on the original object\n            obj[prop as keyof TObj] = value\n\n            // Track that this property was assigned - store using the actual property (symbol or string)\n            changeTracker.assigned_[prop.toString()] = true\n\n            // Track the change directly with the property as the key\n            changeTracker.changes[prop.toString()] = deepClone(value)\n\n            // Mark this object and its ancestors as modified\n            debugLog(`Marking object and ancestors as modified`)\n            markChanged(changeTracker)\n          }\n        } else {\n          debugLog(`Value unchanged, not tracking`)\n        }\n\n        return true\n      },\n\n      defineProperty(ptarget, prop, descriptor) {\n        const result = Reflect.defineProperty(ptarget, prop, descriptor)\n        if (result) {\n          // Track the change if the property has a value\n          if (`value` in descriptor) {\n            changeTracker.changes[prop.toString()] = deepClone(descriptor.value)\n            changeTracker.assigned_[prop.toString()] = true\n            markChanged(changeTracker)\n          }\n        }\n        return result\n      },\n\n      setPrototypeOf(ptarget, proto) {\n        // Allow setting prototype but don't track it as a change\n        return Object.setPrototypeOf(ptarget, proto)\n      },\n\n      deleteProperty(dobj, prop) {\n        const stringProp = typeof prop === `symbol` ? prop.toString() : prop\n\n        if (stringProp in dobj) {\n          // Check if the property exists in the original object\n          const hadPropertyInOriginal =\n            stringProp in changeTracker.originalObject\n\n          // Create a copy of the object if it doesn't exist\n          prepareCopy(changeTracker)\n\n          // Delete the property from the copy\n          if (changeTracker.copy_) {\n            // Use type assertion to tell TypeScript this is allowed\n            delete (changeTracker.copy_ as Record<string | symbol, unknown>)[\n              prop\n            ]\n          }\n\n          // Delete the property from the original object\n          // Use type assertion to tell TypeScript this is allowed\n          delete (dobj as Record<string | symbol, unknown>)[prop]\n\n          // If the property didn't exist in the original object, removing it\n          // should revert to the original state\n          if (!hadPropertyInOriginal) {\n            delete changeTracker.changes[stringProp]\n            delete changeTracker.assigned_[stringProp]\n\n            // If this is the last change and we're not a nested object,\n            // mark the object as unmodified\n            if (\n              Object.keys(changeTracker.assigned_).length === 0 &&\n              Object.getOwnPropertySymbols(changeTracker.assigned_).length === 0\n            ) {\n              changeTracker.modified = false\n            } else {\n              // We still have changes, keep as modified\n              changeTracker.modified = true\n            }\n          } else {\n            // Mark this property as deleted\n            changeTracker.assigned_[stringProp] = false\n            changeTracker.changes[stringProp] = undefined\n            markChanged(changeTracker)\n          }\n        }\n\n        return true\n      },\n    })\n\n    // Cache the proxy\n    proxyCache.set(obj, proxy)\n\n    return proxy\n  }\n\n  // Create a proxy for the target object\n  const proxy = createObjectProxy(target)\n\n  // Return the proxy and a function to get the changes\n  return {\n    proxy,\n    getChanges: () => {\n      debugLog(\n        `getChanges called, modified:`,\n        changeTracker.modified,\n        `assigned keys:`,\n        Object.keys(changeTracker.assigned_)\n      )\n\n      // First, check if the object is still considered modified\n      if (!changeTracker.modified) {\n        debugLog(`Object not modified, returning empty object`)\n        return {}\n      }\n\n      // For deeply nested changes, we need to verify explicitly\n      if (\n        Object.keys(changeTracker.assigned_).length === 0 &&\n        Object.getOwnPropertySymbols(changeTracker.assigned_).length === 0\n      ) {\n        debugLog(`No assigned properties, checking deep equality`)\n\n        // If there are no assigned properties but the object is still marked as modified,\n        // we should check deep equality with the original object\n        if (changeTracker.copy_) {\n          debugLog(`Comparing copy with original`)\n          if (deepEqual(changeTracker.copy_, changeTracker.originalObject)) {\n            debugLog(`Copy equals original, returning empty object`)\n            changeTracker.modified = false\n            return {}\n          }\n        } else if (deepEqual(target, changeTracker.originalObject)) {\n          debugLog(`Target equals original, returning empty object`)\n          changeTracker.modified = false\n          changeTracker.changes = {}\n          changeTracker.assigned_ = {}\n          return {}\n        }\n      }\n\n      debugLog(`Forcing full check for reverted state`)\n      // Force a full check for reverted state, which will update the modified flag accordingly\n      updateModifiedStatus(changeTracker)\n\n      // If we're no longer modified after the check, return empty changes\n      // eslint-disable-next-line\n      if (!changeTracker.modified) {\n        debugLog(`No longer modified after check, returning empty object`)\n        return {}\n      }\n\n      // Handle optimization case - if the object is marked modified but actually is equal to original\n      // eslint-disable-next-line\n      if (changeTracker.modified) {\n        const objToCheck = changeTracker.copy_ || target\n        debugLog(\n          `Checking if object is equal to original:`,\n          objToCheck,\n          changeTracker.originalObject\n        )\n        if (deepEqual(objToCheck, changeTracker.originalObject)) {\n          debugLog(`Object equals original, returning empty object`)\n          changeTracker.modified = false\n          changeTracker.changes = {}\n          changeTracker.assigned_ = {}\n          return {}\n        }\n      }\n\n      // If there are assigned properties, return the changes\n      if (\n        Object.keys(changeTracker.assigned_).length > 0 ||\n        Object.getOwnPropertySymbols(changeTracker.assigned_).length > 0\n      ) {\n        // If we have a copy, use it to construct the changes\n        if (changeTracker.copy_) {\n          const changes: Record<string | symbol, unknown> = {}\n\n          // Add all assigned properties\n          for (const key in changeTracker.assigned_) {\n            if (changeTracker.assigned_[key] === true) {\n              // Property was assigned\n              changes[key] = deepClone(changeTracker.copy_[key as keyof T])\n            } else if (changeTracker.assigned_[key] === false) {\n              // Property was deleted\n              changes[key] = undefined\n            }\n          }\n\n          // Handle symbol properties - this needs special handling\n          const symbolProps = Object.getOwnPropertySymbols(\n            changeTracker.assigned_\n          )\n          for (const sym of symbolProps) {\n            if (changeTracker.assigned_[sym.toString()] === true) {\n              // Use the symbol directly instead of its string 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target === `object` && target !== null) {\n          let allNestedReverted = true\n\n          // Check each property to see if it's been reverted to original\n          for (const key in target) {\n            if (Object.prototype.hasOwnProperty.call(target, key)) {\n              const currentValue = target[key]\n              const originalValue = changeTracker.originalObject[key as keyof T]\n\n              // If this property is different from original, not all are reverted\n              if (!deepEqual(currentValue, originalValue)) {\n                allNestedReverted = false\n                break\n              }\n            }\n          }\n\n          // If all nested properties match original values, return empty changes\n          if (allNestedReverted) {\n            debugLog(\n              `All nested properties match original values, returning empty object`\n            )\n            changeTracker.modified = false\n            changeTracker.changes = {}\n            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them\n * @returns Array of changes made to each object\n */\nexport function withArrayChangeTracking<T extends object>(\n  targets: Array<T>,\n  callback: (proxies: Array<T>) => void\n): Array<Record<string | symbol, unknown>> {\n  const { proxies, getChanges } = createArrayChangeProxy(targets)\n\n  callback(proxies)\n\n  return getChanges()\n}\n\n/**\n * Creates a shallow copy of the target object if it doesn't already exist\n */\nfunction prepareCopy<T extends object>(state: ChangeTracker<T>) {\n  if (!state.copy_) {\n    state.copy_ = shallowCopy(state.originalObject)\n  }\n}\n\n/**\n * Creates a shallow copy of an object\n */\nfunction shallowCopy<T>(obj: T): T {\n  if (Array.isArray(obj)) {\n    return [...obj] as unknown as T\n  }\n\n  if (obj instanceof Map) {\n    return new Map(obj) as unknown as T\n  }\n\n  if (obj instanceof Set) {\n    return new Set(obj) as unknown as T\n  }\n\n  if (obj instanceof Date) {\n    return new Date(obj.getTime()) as unknown as T\n  }\n\n  if 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