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const partialRight = require('lodash/partialRight');
const { getCitations, citeText } = require('./citations');
const { sendMessage } = require('./streamResponse');
const cursor = '<span className="result-streaming">█</span>';
const citationRegex = /\[\^\d+?\^]/g;
const addSpaceIfNeeded = (text) => (text.length > 0 && !text.endsWith(' ') ? text + ' ' : text);
const createOnProgress = ({ generation = '', onProgress: _onProgress }) => {
let i = 0;
let code = '';
let precode = '';
let codeBlock = false;
let tokens = addSpaceIfNeeded(generation);
const progressCallback = async (partial, { res, text, bing = false, ...rest }) => {
let chunk = partial === text ? '' : partial;
tokens += chunk;
precode += chunk;
tokens = tokens.replaceAll('[DONE]', '');
if (codeBlock) {
code += chunk;
}
if (precode.includes('```') && codeBlock) {
codeBlock = false;
precode = precode.replace(/```/g, '');
code = '';
}
if (precode.includes('```') && code === '') {
precode = precode.replace(/```/g, '');
codeBlock = true;
}
if (tokens.match(/^\n(?!:::plugins:::)/)) {
tokens = tokens.replace(/^\n/, '');
}
if (bing) {
tokens = citeText(tokens, true);
}
const payload = { text: tokens, message: true, initial: i === 0, ...rest };
sendMessage(res, { ...payload, text: tokens });
_onProgress && _onProgress(payload);
i++;
};
const sendIntermediateMessage = (res, payload, extraTokens = '') => {
tokens += extraTokens;
sendMessage(res, {
text: tokens?.length === 0 ? cursor : tokens,
message: true,
initial: i === 0,
...payload,
});
i++;
};
const onProgress = (opts) => {
return partialRight(progressCallback, opts);
};
const getPartialText = () => {
return tokens;
};
return { onProgress, getPartialText, sendIntermediateMessage };
};
const handleText = async (response, bing = false) => {
let { text } = response;
response.text = text;
if (bing) {
const links = getCitations(response);
if (response.text.match(citationRegex)?.length > 0) {
text = citeText(response);
}
text += links?.length > 0 ? `\n- ${links}` : '';
}
return text;
};
const isObject = (item) => item && typeof item === 'object' && !Array.isArray(item);
const getString = (input) => (isObject(input) ? JSON.stringify(input) : input);
function formatSteps(steps) {
let output = '';
for (let i = 0; i < steps.length; i++) {
const step = steps[i];
const actionInput = getString(step.action.toolInput);
const observation = step.observation;
if (actionInput === 'N/A' || observation?.trim()?.length === 0) {
continue;
}
output += `Input: ${actionInput}\nOutput: ${getString(observation)}`;
if (steps.length > 1 && i !== steps.length - 1) {
output += '\n---\n';
}
}
return output;
}
function formatAction(action) {
const formattedAction = {
plugin: action.tool,
input: getString(action.toolInput),
thought: action.log.includes('Thought: ')
? action.log.split('\n')[0].replace('Thought: ', '')
: action.log.split('\n')[0],
};
formattedAction.thought = getString(formattedAction.thought);
if (action.tool.toLowerCase() === 'self-reflection' || formattedAction.plugin === 'N/A') {
formattedAction.inputStr = `{\n\tthought: ${formattedAction.input}${
!formattedAction.thought.includes(formattedAction.input)
? ' - ' + formattedAction.thought
: ''
}\n}`;
formattedAction.inputStr = formattedAction.inputStr.replace('N/A - ', '');
} else {
const hasThought = formattedAction.thought.length > 0;
const thought = hasThought ? `\n\tthought: ${formattedAction.thought}` : '';
formattedAction.inputStr = `{\n\tplugin: ${formattedAction.plugin}\n\tinput: ${formattedAction.input}\n${thought}}`;
}
return formattedAction;
}
/**
* Checks if the given string value is truthy by comparing it to the string 'true' (case-insensitive).
*
* @function
* @param {string|null|undefined} value - The string value to check.
* @returns {boolean} Returns `true` if the value is a case-insensitive match for the string 'true', otherwise returns `false`.
* @example
*
* isEnabled("True"); // returns true
* isEnabled("TRUE"); // returns true
* isEnabled("false"); // returns false
* isEnabled(null); // returns false
* isEnabled(); // returns false
*/
function isEnabled(value) {
return value?.toLowerCase()?.trim() === 'true';
}
module.exports = {
createOnProgress,
isEnabled,
handleText,
formatSteps,
formatAction,
addSpaceIfNeeded,
};
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