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 generation

async uploadImage(content, mimeType = null) {

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

/*

Content Types:

* Image URL

* File Path

* Buffer

* ReadableStream

*/

let buffer;

try {

// Auto detection for mime type

if (!mimeType) {

try {

url = new URL(content).pathname;

contentType = mime.getType(url);

} catch (error) {}

if (fs.existsSync(content)) mimeType = mime.getType(content);

}

const image = await jimp.read(content);

buffer = image.getBase64(mimeType || "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();

}

}

async generateImage(prompt) {

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

const client = this.client;

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

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.")

}