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Restructurize Basic Chat document, describe history sync
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ChronosX88
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@ -1,5 +1,42 @@
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# CPE#4 - Basic chats
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## 0. Table of content
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- [CPE#4 - Basic chats](#cpe4---basic-chats)
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- [0. Table of content](#0-table-of-content)
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- [1. Introduction](#1-introduction)
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- [2. Requirements](#2-requirements)
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- [3. Message type identifiers](#3-message-type-identifiers)
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- [4. Errors](#4-errors)
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- [4.1. Error types](#41-error-types)
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- [5. Event types](#5-event-types)
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- [5.1. Media types](#51-media-types)
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- [6. Use cases](#6-use-cases)
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- [6.1. Exchanging messages](#61-exchanging-messages)
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- [6.2. Exchanging media](#62-exchanging-media)
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- [6.3. Read messages](#63-read-messages)
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- [6.4. Typing message](#64-typing-message)
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- [6.5. Message history API](#65-message-history-api)
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- [6.5.1. History retrieving](#651-history-retrieving)
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- [7. Business Rules](#7-business-rules)
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- [7.1. Typing message notification](#71-typing-message-notification)
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- [7.2. Message/Media ID](#72-messagemedia-id)
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- [8. JSON Schema](#8-json-schema)
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- [Event Entity](#event-entity)
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- [Content sections](#content-sections)
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- [Send message (`urn:cadmium:chat:message`)](#send-message-urncadmiumchatmessage)
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- [Request](#request)
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- [Response](#response)
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- [Read message notification (`urn:cadmium:chat:read`)](#read-message-notification-urncadmiumchatread)
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- [Request](#request-1)
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- [Edit message notification (`urn:cadmium:chat:message:edit`)](#edit-message-notification-urncadmiumchatmessageedit)
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- [Request](#request-2)
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- [Delete message notification (`urn:cadmium:chat:message:delete`)](#delete-message-notification-urncadmiumchatmessagedelete)
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- [Request](#request-3)
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- [Sync history of user chats (`urn:cadmium:chat:history:sync`)](#sync-history-of-user-chats-urncadmiumchathistorysync)
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- [Request](#request-4)
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- [Response](#response-1)
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## 1. Introduction
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This extension is intended for organizing chats between some entities.
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@ -16,9 +53,12 @@ This extension is intended for organizing chats between some entities.
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## 3. Message type identifiers
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- `urn:cadmium:chats:message` - regular message
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- `urn:cadmium:chats:read` - read message system
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- `urn:cadmium:chats:typing` - typing message system
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- `urn:cadmium:chat:message` - regular message
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- `urn:cadmium:chat:read` - read message notification
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- `urn:cadmium:chat:typing` - typing message notification
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- `urn:cadmium:chat:message:edit` - edit message notification
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- `urn:cadmium:chat:message:delete` - delete message notification
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- `urn:cadmium:chat:history:sync` - sync history of user chats
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## 4. Errors
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@ -27,35 +67,34 @@ This extension is intended for organizing chats between some entities.
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### 4.1. Error types
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- `urn:cadmium:chats:private:banned` - Sending messages to user is prohibited, because he banned the sender of current message - in case if we send the message to user entity.
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- `urn:cadmium:chat:private:banned` - Sending messages to user is prohibited, because he banned the sender of current message - in case if we send the message to user entity.
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## 5. Chat message types
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## 5. Event types
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- `urn:cadmium:chats:message:types:general` - message with text and optional media
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- `urn:cadmium:chats:message:types:geolocation` - message with geolocation (coordinates)
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- `urn:cadmium:chat:event:message` - message with text and optional media
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### 5.1. Media types
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- `urn:cadmium:chats:media:photo` - a photo
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- `urn:cadmium:chats:media:audio` - an audio or voice message
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- `urn:cadmium:chats:media:video` - a video or rounded video message
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- `urn:cadmium:chats:media:file` - any other file type
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- `urn:cadmium:chats:media:sticker` - a sticker
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- `urn:cadmium:chats:media:gif` - an animated GIF
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- `urn:cadmium:chat:media:photo` - a photo
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- `urn:cadmium:chat:media:audio` - an audio or voice message
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- `urn:cadmium:chat:media:video` - a video or rounded video message
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- `urn:cadmium:chat:media:file` - any other file type
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- `urn:cadmium:chat:media:sticker` - a sticker
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- `urn:cadmium:chat:media:gif` - an animated GIF
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## 6. Use cases
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### 6.1. Exchanging messages
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1. Sending message:
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1. C1->S - Sending message:
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```json
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{
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"id": "abcd",
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"type": "urn:cadmium:chats:message",
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"type": "urn:cadmium:chat:message",
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"to": ["@user2@cadmium.org"],
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"payload": {
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"type": "urn:cadmium:chats:message:types:general",
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"type": "urn:cadmium:chat:event:message",
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"content": {
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"text": "hello world",
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}
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@ -63,48 +102,48 @@ This extension is intended for organizing chats between some entities.
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}
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```
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**Successful response**:
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S->C1 - Successful response:
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```json
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{
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"id": "abcd",
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"type": "urn:cadmium:chats:message",
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"type": "urn:cadmium:chat:message",
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"from": "cadmium.org",
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"ok": true,
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"payload": {
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"messageID": "3b5135a5-aff5-4396-a629-a254f383e82f",
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"eventID": "3b5135a5-aff5-4396-a629-a254f383e82f",
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"originServerTimestamp": 1599327584
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}
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}
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```
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**Error response**:
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S->C1 - **Error** response:
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```json
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{
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"id": "abcd",
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"type": "urn:cadmium:chats:message",
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"type": "urn:cadmium:chat:message",
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"from": "cadmium.org",
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"ok": false,
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"payload": {
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"errID": "urn:cadmium:chats:private:banned",
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"errText": "The user banned you"
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"errID": "urn:cadmium:chat:private:banned",
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"errText": "The user has banned you"
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}
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}
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```
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2. Receiving message on other side:
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2. S->C2:
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```json
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{
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"id": "abcd",
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"type": "urn:cadmium:chats:message",
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"type": "urn:cadmium:chat:message",
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"from": "@user1@cadmium.im",
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"ok": true,
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"payload": {
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"messageID": "3b5135a5-aff5-4396-a629-a254f383e82f",
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"eventID": "3b5135a5-aff5-4396-a629-a254f383e82f",
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"originServerTimestamp": 1599327584,
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"type": "urn:cadmium:chats:message:types:general",
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"type": "urn:cadmium:chat:event:message",
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"content": {
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"text": "hello world",
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}
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@ -117,13 +156,14 @@ This extension is intended for organizing chats between some entities.
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1. Upload the media to Content Service (explanation out of scope of this document)
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2. Send message containing the metadata of uploaded media:
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C1->S:
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```json
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{
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"id": "abcd",
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"type": "urn:cadmium:chats:message",
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"type": "urn:cadmium:chat:message",
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"to": ["@user2@cadmium.im"],
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"payload": {
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"type": "urn:cadmium:chats:message-types:general",
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"type": "urn:cadmium:chat:event:message",
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"content": {
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"text": "",
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"media": [
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}
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```
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**Response**:
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S->C1:
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```json
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{
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"id": "abcd",
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"type": "urn:cadmium:chats:message",
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"type": "urn:cadmium:chat:message",
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"from": "cadmium.im",
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"ok": true,
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"payload": {
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3. Receive message with media on other side:
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S->C2:
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```json
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{
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"id": "defg",
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"type": "urn:cadmium:chats:message",
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"type": "urn:cadmium:chat:message",
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"from": "@user1@cadmium.im",
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"ok": true,
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"payload": {
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"messageID": "7a1b9a72-1677-4476-9b22-ef7fdbcff52e",
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"originServerTimestamp": 1599329232,
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"type": "urn:cadmium:chats:message:types:general",
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"type": "urn:cadmium:chat:event:message",
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"content": {
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"text": "",
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"media": [
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{
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"id": "4a771ac1-f0b2-4a4a-9700-f2a26fa2bb67@content.cadmium.im",
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"type": "urn:cadmium:chats:media:photo",
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"type": "urn:cadmium:chat:media:photo",
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"attrs": {
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"width": 512,
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"height": 512
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```json
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{
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"id": "abcd",
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"type": "urn:cadmium:chats:read",
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"type": "urn:cadmium:chat:read",
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"to": ["@user1@cadmium.org"],
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"payload": {
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"messageID": "7a1b9a72-1677-4476-9b22-ef7fdbcff52e",
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@ -204,7 +245,7 @@ This extension is intended for organizing chats between some entities.
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```json
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{
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"id": "abcd",
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"type": "urn:cadmium:chats:read",
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"type": "urn:cadmium:chat:read",
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"from": "cadmium.im",
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"ok": true,
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"payload": {}
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```json
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{
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"id": "defg",
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"type": "urn:cadmium:chats:read",
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"type": "urn:cadmium:chat:read",
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"from": "@user2@cadmium.im",
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"ok": true,
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"payload": {
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```json
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{
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"id": "abcd",
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"type": "urn:cadmium:chats:typing",
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"type": "urn:cadmium:chat:typing",
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"to": ["@user1@cadmium.org"],
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"payload": {}
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}
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```
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```json
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{
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"id": "defg",
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"type": "urn:cadmium:chats:typing",
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"type": "urn:cadmium:chat:typing",
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"from": "@user2@cadmium.im",
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"ok": true,
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"payload": {}
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"ok": true
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}
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```
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### 6.5. Message history API
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#### 6.5.1. History retrieving
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## 7. Business Rules
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### 7.1. Typing message notification
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## 8. JSON Schema
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### Message (`urn:cadmium:chats:message`)
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**Request**:
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### Event Entity
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```typescript
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interface MessagePayload {
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messageID?: EntityID; // the message id (stored in chat timeline) - not required when sending
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type: string; // the type of message
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replyTo?: EntityID; // message id to which this message is replying
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originServerTimestamp?: number; // unix timestamp of received message on the origin server (not required when sending)
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forwardedFrom?: EntityID | string; // entity from which this message was forwarded (may be hidden, so instead client need to show the display name of entity)
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content: Content // the payload of message (depends on type)
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interface Event {
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id: EntityID; // the message id (stored in chat timeline) - not required when sending
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type: string; // the type of event
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originServerTimestamp: number; // unix timestamp of received message on the origin server (not required when sending)
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content: Content; // the payload of message (depends on type)
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}
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```
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**Response**:
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```typescript
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interface SendMessageResponsePayload {
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messageID: EntityID; // the message id (stored in chat timeline)
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originServerTimestamp: number; // unix timestamp of sent message on the origin server
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}
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interface Content {}
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```
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#### Content sections
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- `urn:cadmium:chats:message:types:general`:
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- `urn:cadmium:chat:events:types:message`:
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```typescript
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interface GeneralMessageContent {
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interface MessageContent : Content {
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text: string; // the text (body) of message
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mentioned?: boolean; // is current entity was mentioned in this message
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media?: Media[]; // media content
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forwardedFrom?: EntityID | string; // entity from which this message was forwarded (may be hidden, so instead client need to show the display name of entity)
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replyTo?: EntityID; // message id to which this message is replying
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}
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interface Media {
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@ -338,21 +376,101 @@ interface SendMessageResponsePayload {
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width: number; // width of photo
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height: number; // height of photo
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}
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```
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- `urn:cadmium:chats:message:types:geolocation`:
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```typescript
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interface GeolocationMessageContent {
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lat: number; // the GPS latitude
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interface GeolocationAttrs : MediaAttrs {
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lat: number; // the GPS latitude
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lon: number; // the GPS longitude
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}
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}
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```
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### Read message notification (`urn:cadmium:chats:read`)
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### Send message (`urn:cadmium:chat:message`)
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#### Request
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```typescript
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interface ReadMessageNotifPayload {
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messageID: EntityID; // the message id of read message
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interface SendMessageReq {
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type: string;
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content: Content;
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}
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```
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#### Response
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```typescript
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interface SendMessageResponsePayload {
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id: EntityID; // the message id (stored in chat timeline)
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originServerTimestamp: number; // unix timestamp of sent message on the origin server
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}
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```
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### Read message notification (`urn:cadmium:chat:read`)
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#### Request
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```typescript
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interface ReadMessageNotif {
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eventID: EntityID; // the read message id
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}
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```
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### Edit message notification (`urn:cadmium:chat:message:edit`)
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#### Request
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```typescript
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interface EditMessageNotif {
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eventID: EntityID; // edited message id
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updatedContent: Content; // new content of message
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}
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```
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### Delete message notification (`urn:cadmium:chat:message:delete`)
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#### Request
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```typescript
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interface DeleteMessageNotif {
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eventID: EntityID; // deleted message id
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}
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```
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### Sync history of user chats (`urn:cadmium:chat:history:sync`)
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#### Request
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```typescript
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interface ChatsHistorySyncReq {
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since: EntityID; // event from which need to sync the history
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limit: number; // count of events which need to return
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includeChatInfo: boolean; // include chat/user info mentioned in events into response
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chatID?: EntityID; // get history of specific chat
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direction?: SyncDirection; // in case of getting history of specific chat
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}
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enum SyncDirection {
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Up = "UP", // previous events from 'since' event
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Down = "DOWN" // next events from 'since' event
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}
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```
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#### Response
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```typescript
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interface ChatsHistorySyncResp {
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nextBatch: EntityID; // next 'since' value for client
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events: Event[]; // synced events
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chats?: Chat[]; // chats mentioned in events
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users?: User[]; // users mentioned in events
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}
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interface Event {
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eventID: EntityID; // event id in timeline
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from: EntityID; // event author
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chatID: EntityID; // related chat id
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type: string; // type of event
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timestamp: number; // origin timestamp of event
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originServer: EntityID; // origin server author of event
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content: Content; // content of event
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}
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```
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