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Collection.ts
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Collection.ts
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import { extendArray, isObject, isString, UuidMap } from '@standardnotes/utils'
import { remove } from 'lodash'
import { ItemContent } from '../../Abstract/Content/ItemContent'
import { ContentReference } from '../../Abstract/Item'
export interface CollectionElement {
uuid: string
content_type: string
dirty?: boolean
deleted?: boolean
}
export interface DecryptedCollectionElement<C extends ItemContent = ItemContent> extends CollectionElement {
content: C
references: ContentReference[]
}
export interface DeletedCollectionElement extends CollectionElement {
content: undefined
deleted: true
}
export interface EncryptedCollectionElement extends CollectionElement {
content: string
errorDecrypting: boolean
}
export abstract class Collection<
Element extends Decrypted | Encrypted | Deleted,
Decrypted extends DecryptedCollectionElement,
Encrypted extends EncryptedCollectionElement,
Deleted extends DeletedCollectionElement,
> {
readonly map: Partial<Record<string, Element>> = {}
readonly typedMap: Partial<Record<string, Element[]>> = {}
/** An array of uuids of items that are dirty */
dirtyIndex: Set<string> = new Set()
/** An array of uuids of items that are not marked as deleted */
nondeletedIndex: Set<string> = new Set()
/** An array of uuids of items that are errorDecrypting or waitingForKey */
invalidsIndex: Set<string> = new Set()
readonly referenceMap: UuidMap
/** Maintains an index for each item uuid where the value is an array of uuids that are
* conflicts of that item. So if Note B and C are conflicts of Note A,
* conflictMap[A.uuid] == [B.uuid, C.uuid] */
readonly conflictMap: UuidMap
isDecryptedElement = (e: Decrypted | Encrypted | Deleted): e is Decrypted => {
return isObject(e.content)
}
isEncryptedElement = (e: Decrypted | Encrypted | Deleted): e is Encrypted => {
return 'content' in e && isString(e.content)
}
isErrorDecryptingElement = (e: Decrypted | Encrypted | Deleted): e is Encrypted => {
return this.isEncryptedElement(e)
}
isDeletedElement = (e: Decrypted | Encrypted | Deleted): e is Deleted => {
return 'deleted' in e && e.deleted === true
}
isNonDeletedElement = (e: Decrypted | Encrypted | Deleted): e is Decrypted | Encrypted => {
return !this.isDeletedElement(e)
}
constructor(
copy = false,
mapCopy?: Partial<Record<string, Element>>,
typedMapCopy?: Partial<Record<string, Element[]>>,
referenceMapCopy?: UuidMap,
conflictMapCopy?: UuidMap,
) {
if (copy) {
this.map = mapCopy as Record<string, Element>
this.typedMap = typedMapCopy as Record<string, Element[]>
this.referenceMap = referenceMapCopy as UuidMap
this.conflictMap = conflictMapCopy as UuidMap
} else {
this.referenceMap = new UuidMap()
this.conflictMap = new UuidMap()
}
}
public uuids(): string[] {
return Object.keys(this.map)
}
public all(contentType?: string | string[]): Element[] {
if (contentType) {
if (Array.isArray(contentType)) {
const elements: Element[] = []
for (const type of contentType) {
extendArray(elements, this.typedMap[type] || [])
}
return elements
} else {
return this.typedMap[contentType]?.slice() || []
}
} else {
return Object.keys(this.map).map((uuid: string) => {
return this.map[uuid]
}) as Element[]
}
}
/** Returns all elements that are not marked as deleted */
public nondeletedElements(): Element[] {
const uuids = Array.from(this.nondeletedIndex)
return this.findAll(uuids).filter(this.isNonDeletedElement)
}
/** Returns all elements that are errorDecrypting or waitingForKey */
public invalidElements(): Encrypted[] {
const uuids = Array.from(this.invalidsIndex)
return this.findAll(uuids) as unknown as Encrypted[]
}
/** Returns all elements that are marked as dirty */
public dirtyElements(): Element[] {
const uuids = Array.from(this.dirtyIndex)
return this.findAll(uuids)
}
public findAll(uuids: string[]): Element[] {
const results: Element[] = []
for (const id of uuids) {
const element = this.map[id]
if (element) {
results.push(element)
}
}
return results
}
public find(uuid: string): Element | undefined {
return this.map[uuid]
}
public has(uuid: string): boolean {
return this.find(uuid) != undefined
}
/**
* If an item is not found, an `undefined` element
* will be inserted into the array.
*/
public findAllIncludingBlanks<E extends Element>(uuids: string[]): (E | Deleted | undefined)[] {
const results: (E | Deleted | undefined)[] = []
for (const id of uuids) {
const element = this.map[id] as E | Deleted | undefined
results.push(element)
}
return results
}
public set(elements: Element | Element[]): void {
elements = Array.isArray(elements) ? elements : [elements]
if (elements.length === 0) {
console.warn('Attempting to set 0 elements onto collection')
return
}
for (const element of elements) {
this.map[element.uuid] = element
this.setToTypedMap(element)
if (this.isErrorDecryptingElement(element)) {
this.invalidsIndex.add(element.uuid)
} else {
this.invalidsIndex.delete(element.uuid)
}
if (this.isDecryptedElement(element)) {
const conflictOf = element.content.conflict_of
if (conflictOf && !element.content.trashed) {
this.conflictMap.establishRelationship(conflictOf, element.uuid)
}
const isConflictOfButTrashed = conflictOf && element.content.trashed
const isInConflictMapButIsNotConflictOf =
!conflictOf && this.conflictMap.getInverseRelationships(element.uuid).length > 0
const isInConflictMapButDoesNotHaveConflicts =
this.conflictMap.existsInDirectMap(element.uuid) &&
this.conflictMap.getDirectRelationships(element.uuid).length === 0
if (isInConflictMapButIsNotConflictOf || isInConflictMapButDoesNotHaveConflicts || isConflictOfButTrashed) {
this.conflictMap.removeFromMap(element.uuid)
}
this.referenceMap.setAllRelationships(
element.uuid,
element.references.map((r) => r.uuid),
)
}
if (element.dirty) {
this.dirtyIndex.add(element.uuid)
} else {
this.dirtyIndex.delete(element.uuid)
}
if (element.deleted) {
this.nondeletedIndex.delete(element.uuid)
if (this.conflictMap.existsInDirectMap(element.uuid) || this.conflictMap.existsInInverseMap(element.uuid)) {
this.conflictMap.removeFromMap(element.uuid)
}
} else {
this.nondeletedIndex.add(element.uuid)
}
}
}
public discard(elements: Element | Element[]): void {
elements = Array.isArray(elements) ? elements : [elements]
for (const element of elements) {
this.deleteFromTypedMap(element)
delete this.map[element.uuid]
this.conflictMap.removeFromMap(element.uuid)
this.referenceMap.removeFromMap(element.uuid)
}
}
public uuidReferencesForUuid(uuid: string): string[] {
return this.referenceMap.getDirectRelationships(uuid)
}
public uuidsThatReferenceUuid(uuid: string): string[] {
return this.referenceMap.getInverseRelationships(uuid)
}
public referencesForElement(element: Decrypted): Element[] {
const uuids = this.referenceMap.getDirectRelationships(element.uuid)
return this.findAll(uuids)
}
public conflictsOf(uuid: string): Element[] {
const uuids = this.conflictMap.getDirectRelationships(uuid)
return this.findAll(uuids)
}
public elementsReferencingElement(element: Decrypted, contentType?: string): Element[] {
const uuids = this.uuidsThatReferenceUuid(element.uuid)
const items = this.findAll(uuids)
if (!contentType) {
return items
}
return items.filter((item) => item.content_type === contentType)
}
private setToTypedMap(element: Element): void {
const array = this.typedMap[element.content_type] || []
remove(array, { uuid: element.uuid as never })
array.push(element)
this.typedMap[element.content_type] = array
}
private deleteFromTypedMap(element: Element): void {
const array = this.typedMap[element.content_type] || []
remove(array, { uuid: element.uuid as never })
this.typedMap[element.content_type] = array
}
public uuidsOfItemsWithConflicts(): string[] {
return this.conflictMap.getAllDirectKeys()
}
}