constructor(client, characterId, continueBody) {

this.characterId = characterId;

this.externalId = continueBody.external_id;

this.client = client;

const ai = continueBody.participants.find(

(participant) => participant.is_human === false

);

this.aiId = ai.user.username;

this.requester = client.requester;

}

async fetchHistory(pageNumber) {

if (!this.client.isAuthenticated()) throw Error('You must be authenticated to do this.');

// page number is optional

if (pageNumber) {

if (typeof(pageNumber) != "number") throw Error("Invalid arguments");

}

const client = this.client;

const pageString = pageNumber ? `&page_num=${pageNumber}` : ''

const request = await this.requester.request(`https://beta.character.ai/chat/history/msgs/user/?history_external_id=${this.externalId}${pageString}`, {

headers:client.getHeaders()

})

if (request.status() === 200) {

const response = await Parser.parseJSON(request)

const historyMessages = response.messages;

const messages = [];

for (let i = 0; i < historyMessages.length; i++) {

const message = historyMessages[i];

messages.push(new Message(this, message));

}

const hasMore = response.has_more;

const nextPage = response.next_page;

return new MessageHistory(this, messages, hasMore, nextPage);

} else Error('Could not fetch the chat history.')

}

async sendAndAwaitResponse(optionsOrMessage, singleReply) {

if (!this.client.isAuthenticated()) throw Error('You must be authenticated to do this.');

const payload = new OutgoingMessage(this, optionsOrMessage)

const client = this.client;

if (!client.isAuthenticated()) throw Error('You must be authenticated to do this.');

const request = await this.requester.request('https://beta.character.ai/chat/streaming/', {

body:Parser.stringify(payload),

method:'POST',

headers:client.getHeaders(),

client:this.client

}, true)

if (request.status() === 200) {

const response = await Parser.parseJSON(request);

const replies = response.replies;

const messages = []

for (let i = 0; i < replies.length; i++) {

messages.push(new Reply(this, response));

}

if (!singleReply) return messages;

else return messages.pop();

} else throw Error('Failed sending message.')

}

// image interaction

async uploadImage(content) {

if (!this.client.isAuthenticated()) throw Error('You must be authenticated to do this.');

/*

Content Types:

* Image URL

* File Path

* Buffer

* ReadableStream

*/

let buffer;

try {

const image = await jimp.read(content);

buffer = image.getBase64('image/png');

} catch (error) {

throw Error("Content is invalid or not an image");

}

if (!buffer) throw Error("Invalid content");

const client = this.client;

const error = () => {throw Error('Failed uploading image.');}

try {

const request = this.requester.uploadBuffer(buffer, client);

if (request.status() === 200) {

return `https://characterai.io/i/400/static/user/${request.response}`;

} else error();

} catch (error) { error(); }

}

// todo

async generateImage(prompt) {

if (!this.client.isAuthenticated()) throw Error('You must be authenticated to do this.');

const client = this.client;

if (typeof(prompt) != "string") throw Error("Invalid arguments");

const request = await this.requester.request('https://beta.character.ai/chat/generate-image/', {

headers:client.getHeaders(),

method:'POST',

client:this.client,

body: Parser.stringify({image_description:prompt})

}, true)

if (request.status() === 200) {

const response = await Parser.parseJSON(request);

return response.image_rel_path;

} else throw Error('Failed generating image.')

}

// conversations

async changeToConversationId(conversationExternalId, force = false) {

if (typeof(conversationExternalId) != 'string' || typeof(force) != 'boolean') throw Error("Invalid arguments");

if (!this.client.isAuthenticated()) throw Error('You must be authenticated to do this.');

// force means that we dont check if the conversation exists, may lead to errors

let passing = false;

if (!force) {

let conversations = await this.getSavedConversations();

conversations = conversations.histories;

for (let i = 0; i < conversations.length; i++) {

const conversation = conversations[i];

if (conversation.external_id == conversationExternalId) passing = true;

}

} else passing = true;

if (passing) this.externalId = conversationExternalId;

else Error("Could not switch to conversation, it either doesn't exist or is invalid.")

}

async getSavedConversations(amount = 50) {

if (typeof(amount) != 'number') throw Error("Invalid arguments");

if (!this.client.isAuthenticated()) throw Error('You must be authenticated to do this.');

const client = this.client;

const request = await this.requester.request(`https://beta.character.ai/chat/character/histories/`, {

headers:client.getHeaders(),

method:'POST',

body: Parser.stringify({

"external_id" : this.characterId,

"number" : amount

})

})

if (request.status() === 200) {

const response = await Parser.parseJSON(request)

this.externalId = response.external_id;

return response;

} else throw Error('Failed saving & creating new chat.')

}

// messages

async getMessageById(messageId) {

//if (typeof(messageId) != 'string') throw Error('Invalid arguments - (Message ids are now strings)');

messageId = messageId.toString();

if (!this.client.isAuthenticated()) throw Error('You must be authenticated to do this.');

const history = await this.fetchHistory()

const historyMessages = history.messages;

for (let i = 0; i < historyMessages.length; i++) {

const message = historyMessages[i];

if (message.id == messageId) return message;

}

return null;

}

async deleteMessage(messageId) {

if (typeof(messageId) != 'string') throw Error('Invalid arguments - (Message ids are now strings)');

if (!this.client.isAuthenticated()) throw Error('You must be authenticated to do this.');

if (this.client.isGuest()) throw Error('Guest accounts cannot delete messsages.');

const client = this.client;

const request = await this.requester.request(`https://beta.character.ai/chat/history/msgs/delete/`, {

headers:client.getHeaders(),

method:'POST',

body: Parser.stringify({

"history_id" : this.externalId,

"ids_to_delete" : [messageId],

"regenerating" : false

})

})

let passing = false;

if (request.status() === 200) {

const response = await Parser.parseJSON(request);

if (response.status === 'OK') passing = true;

}

if (!passing) throw Error('Failed to delete the message.');

}

async deleteMessages(messageIds) {

if (!this.client.isAuthenticated()) throw Error('You must be authenticated to do this.');

if (this.client.isGuest()) throw Error('Guest accounts cannot delete messsages.');

const messagesToDelete = [];

try {

for (let i = 0; i < messageIds.length; i++) {

const messageId = messageIds[i];

if (typeof(messageId) == "string") {

messagesToDelete.push(messageId);

}

}

} catch (error) {

throw Error("Failed to delete messages.")

};

const client = this.client;

const request = await this.requester.request(`https://beta.character.ai/chat/history/msgs/delete/`, {

headers:client.getHeaders(),

method:'POST',

body: Parser.stringify({

"history_id" : this.externalId,

"ids_to_delete" : messagesToDelete,

"regenerating" : false

})

})

let passing = false;

if (request.status() === 200) {

const response = await Parser.parseJSON(request);

if (response.status === 'OK') passing = true;

}

if (!passing) throw Error('Failed to delete messages.');

}

async deleteMessagesBulk(amount = 50, descending = false) {

if (typeof(amount) != 'number') throw Error('Invalid arguments');

if (!this.client.isAuthenticated()) throw Error('You must be authenticated to do this.');

if (this.client.isGuest()) throw Error('Guest accounts cannot bulk delete messsages.');

let idsToDelete = [];

const history = await this.fetchHistory()

const historyMessages = history.messages;

for (let i = 0; i < amount; i++) {

if (!descending) i = (amount - i);

const message = historyMessages[i];

if (message) idsToDelete.push(message.id);

}

if (idsToDelete.length == 0) return;

const client = this.client;

const request = await this.requester.request(`https://beta.character.ai/chat/history/msgs/delete/`, {

headers:client.getHeaders(),

method:'POST',

body: Parser.stringify({

"history_id" : this.externalId,

"ids_to_delete" : idsToDelete,

"regenerating" : false

})

})

let passing = false;

if (request.status() === 200) {

const response = await Parser.parseJSON(request);

if (response.status === 'OK') passing = true;

}

if (!passing) throw Error('Failed to bulk delete messages.');

}

async saveAndStartNewChat() {

if (!this.client.isAuthenticated()) throw Error('You must be authenticated to do this.');

const client = this.client;

const request = await this.requester.request(`https://beta.character.ai/chat/history/create/`, {

headers:client.getHeaders(),

method:'POST',

body: Parser.stringify({

"character_external_id" : this.characterId

})

})

if (request.status() === 200) {

const response = await Parser.parseJSON(request)

this.externalId = response.external_id;

return response;

} else throw Error('Failed saving & creating new chat.')

}