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* implement `MessagesGet`
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,44 @@ | ||
| { | ||
| "$schema": "http://json-schema.org/draft-07/schema#", | ||
| "$id": "https://identity.foundation/dwn/json-schemas/messages-get.json", | ||
| "type": "object", | ||
| "additionalProperties": false, | ||
| "required": [ | ||
| "authorization", | ||
| "descriptor" | ||
| ], | ||
| "properties": { | ||
| "authorization": { | ||
| "$ref": "https://identity.foundation/dwn/json-schemas/general-jws.json" | ||
| }, | ||
| "descriptor": { | ||
| "type": "object", | ||
| "additionalProperties": false, | ||
| "required": [ | ||
| "interface", | ||
| "method" | ||
| ], | ||
| "properties": { | ||
| "interface": { | ||
| "enum": [ | ||
| "Messages" | ||
| ], | ||
| "type": "string" | ||
| }, | ||
| "method": { | ||
| "enum": [ | ||
| "Get" | ||
| ], | ||
| "type": "string" | ||
| }, | ||
| "messageCids": { | ||
| "type": "array", | ||
| "items": { | ||
| "type": "string" | ||
| }, | ||
| "minItems": 1 | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| import type { DataStore } from '../../../store/data-store.js'; | ||
| import type { DidResolver } from '../../../did/did-resolver.js'; | ||
| import type { MessageStore } from '../../../store/message-store.js'; | ||
| import type { MethodHandler } from '../../types.js'; | ||
| import type { MessagesGetMessage, MessagesGetReply, MessagesGetReplyEntry } from '../types.js'; | ||
|
|
||
| import { DataStream } from '../../../utils/data-stream.js'; | ||
| import { DwnConstant } from '../../../core/dwn-constant.js'; | ||
| import { Encoder } from '../../../utils/encoder.js'; | ||
| import { MessageReply } from '../../../core/message-reply.js'; | ||
| import { MessagesGet } from '../messages/messages-get.js'; | ||
| import { authenticate, authorize } from '../../../core/auth.js'; | ||
| import { DwnInterfaceName, DwnMethodName, Message } from '../../../core/message.js'; | ||
|
|
||
| type HandleArgs = { tenant: string, message: MessagesGetMessage }; | ||
|
|
||
| export class MessagesGetHandler implements MethodHandler { | ||
| constructor(private didResolver: DidResolver, private messageStore: MessageStore, private dataStore: DataStore) {} | ||
|
|
||
| public async handle({ tenant, message }: HandleArgs): Promise<MessagesGetReply> { | ||
| let messagesGet: MessagesGet; | ||
|
|
||
| try { | ||
| messagesGet = await MessagesGet.parse(message); | ||
| } catch (e) { | ||
| return MessageReply.fromError(e, 400); | ||
| } | ||
|
|
||
| try { | ||
| await authenticate(message.authorization, this.didResolver); | ||
| await authorize(tenant, messagesGet); | ||
| } catch (e) { | ||
| return MessageReply.fromError(e, 401); | ||
| } | ||
|
|
||
| const promises: Promise<MessagesGetReplyEntry>[] = []; | ||
| const messageCids = new Set(message.descriptor.messageCids); | ||
|
|
||
| for (const messageCid of messageCids) { | ||
| const promise = this.messageStore.get(tenant, messageCid) | ||
| .then(message => { | ||
| return { messageCid, message }; | ||
| }) | ||
| .catch(_ => { | ||
| return { messageCid, message: undefined, error: `Failed to get message ${messageCid}` }; | ||
| }); | ||
|
|
||
| promises.push(promise); | ||
| } | ||
|
|
||
| const messages = await Promise.all(promises); | ||
|
|
||
| // for every message, include associated data as `encodedData` IF: | ||
| // * its a RecordsWrite | ||
| // * the data size is equal or smaller than the size threshold | ||
| //! NOTE: this is somewhat duplicate code that also exists in `StorageController.query`. | ||
| for (const entry of messages) { | ||
| const { message } = entry; | ||
|
|
||
| if (!message) { | ||
| continue; | ||
| } | ||
|
|
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| const { interface: messageInterface, method } = message.descriptor; | ||
| if (messageInterface !== DwnInterfaceName.Records || method !== DwnMethodName.Write) { | ||
| continue; | ||
| } | ||
|
|
||
| const dataCid = message.descriptor.dataCid; | ||
| const dataSize = message.descriptor.dataSize; | ||
|
|
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| if (dataCid !== undefined && dataSize! <= DwnConstant.maxDataSizeAllowedToBeEncoded) { | ||
| const messageCid = await Message.getCid(message); | ||
| const result = await this.dataStore.get(tenant, messageCid, dataCid); | ||
|
|
||
| if (result) { | ||
| const dataBytes = await DataStream.toBytes(result.dataStream); | ||
| entry.encodedData = Encoder.bytesToBase64Url(dataBytes); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return { | ||
| status: { code: 200, detail: 'OK' }, | ||
| messages | ||
| }; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,53 @@ | ||
| import type { SignatureInput } from '../../../jose/jws/general/types.js'; | ||
| import type { MessagesGetDescriptor, MessagesGetMessage } from '../types.js'; | ||
|
|
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| import { parseCid } from '../../../utils/cid.js'; | ||
| import { validateAuthorizationIntegrity } from '../../../core/auth.js'; | ||
| import { DwnInterfaceName, DwnMethodName, Message } from '../../../core/message.js'; | ||
|
|
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| export type MessagesGetOptions = { | ||
| messageCids: string[]; | ||
| authorizationSignatureInput: SignatureInput; | ||
| }; | ||
|
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| export class MessagesGet extends Message<MessagesGetMessage> { | ||
| public static async parse(message: MessagesGetMessage): Promise<MessagesGet> { | ||
| Message.validateJsonSchema(message); | ||
| this.validateMessageCids(message.descriptor.messageCids); | ||
|
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| await validateAuthorizationIntegrity(message); | ||
|
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| return new MessagesGet(message); | ||
| } | ||
|
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| public static async create(options: MessagesGetOptions): Promise<MessagesGet> { | ||
| const descriptor: MessagesGetDescriptor = { | ||
| interface : DwnInterfaceName.Messages, | ||
| method : DwnMethodName.Get, | ||
| messageCids : options.messageCids | ||
| }; | ||
|
|
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| const authorization = await Message.signAsAuthorization(descriptor, options.authorizationSignatureInput); | ||
| const message = { descriptor, authorization }; | ||
|
|
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| Message.validateJsonSchema(message); | ||
| MessagesGet.validateMessageCids(options.messageCids); | ||
|
|
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| return new MessagesGet(message); | ||
| } | ||
|
|
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| /** | ||
| * validates the provided cids | ||
| * @param messageCids - the cids in question | ||
| * @throws {Error} if an invalid cid is found. | ||
| */ | ||
| private static validateMessageCids(messageCids: string[]): void { | ||
| for (const cid of messageCids) { | ||
| try { | ||
| parseCid(cid); | ||
| } catch (_) { | ||
| throw new Error(`${cid} is not a valid CID`); | ||
| } | ||
| } | ||
| } | ||
| } |
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