dtamind-components
Version:
DTAmindai Components
406 lines (403 loc) • 16 kB
JavaScript
;
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const lodash_1 = require("lodash");
const src_1 = require("../../../src");
const documents_1 = require("@langchain/core/documents");
const jsonpointer_1 = __importDefault(require("jsonpointer"));
const base_1 = require("langchain/document_loaders/base");
const howToUseCode = `
You can add metadata dynamically from the document:
For example, if the JSON document is:
\`\`\`json
[
{
"url": "https://www.google.com",
"body": "This is body 1"
},
{
"url": "https://www.yahoo.com",
"body": "This is body 2"
}
]
\`\`\`
You can have the "url" value as metadata by returning the following:
\`\`\`json
{
"url": "/url"
}
\`\`\``;
class Json_DocumentLoaders {
constructor() {
this.label = 'Json File';
this.name = 'jsonFile';
this.version = 3.0;
this.type = 'Document';
this.icon = 'json.svg';
this.category = 'Document Loaders';
this.description = `Load data from JSON files`;
this.baseClasses = [this.type];
this.inputs = [
{
label: 'Json File',
name: 'jsonFile',
type: 'file',
fileType: '.json'
},
{
label: 'Text Splitter',
name: 'textSplitter',
type: 'TextSplitter',
optional: true
},
{
label: 'Pointers Extraction (separated by commas)',
name: 'pointersName',
type: 'string',
description: 'Ex: { "key": "value" }, Pointer Extraction = "key", "value" will be extracted as pageContent of the chunk. Use comma to separate multiple pointers',
placeholder: 'key1, key2',
optional: true
},
{
label: 'Additional Metadata',
name: 'metadata',
type: 'json',
description: 'Additional metadata to be added to the extracted documents. You can add metadata dynamically from the document. Ex: { "key": "value", "source": "www.example.com" }. Metadata: { "page": "/source" } will extract the value of the key "source" from the document and add it to the metadata with the key "page"',
hint: {
label: 'How to use',
value: howToUseCode
},
optional: true,
additionalParams: true
},
{
label: 'Omit Metadata Keys',
name: 'omitMetadataKeys',
type: 'string',
rows: 4,
description: 'Each document loader comes with a default set of metadata keys that are extracted from the document. You can use this field to omit some of the default metadata keys. The value should be a list of keys, seperated by comma. Use * to omit all metadata keys execept the ones you specify in the Additional Metadata field',
placeholder: 'key1, key2, key3.nestedKey1',
optional: true,
additionalParams: true
}
];
this.outputs = [
{
label: 'Document',
name: 'document',
description: 'Array of document objects containing metadata and pageContent',
baseClasses: [...this.baseClasses, 'json']
},
{
label: 'Text',
name: 'text',
description: 'Concatenated string from pageContent of documents',
baseClasses: ['string', 'json']
}
];
}
async init(nodeData, _, options) {
const textSplitter = nodeData.inputs?.textSplitter;
const jsonFileBase64 = nodeData.inputs?.jsonFile;
const pointersName = nodeData.inputs?.pointersName;
const metadata = nodeData.inputs?.metadata;
const _omitMetadataKeys = nodeData.inputs?.omitMetadataKeys;
const output = nodeData.outputs?.output;
let omitMetadataKeys = [];
if (_omitMetadataKeys) {
omitMetadataKeys = _omitMetadataKeys.split(',').map((key) => key.trim());
}
let pointers = [];
if (pointersName) {
const outputString = pointersName.replace(/[^a-zA-Z0-9,]+/g, ',');
pointers = outputString.split(',').map((pointer) => '/' + pointer.trim());
}
let docs = [];
let files = [];
//FILE-STORAGE::["CONTRIBUTING.md","LICENSE.md","README.md"]
if (jsonFileBase64.startsWith('FILE-STORAGE::')) {
const fileName = jsonFileBase64.replace('FILE-STORAGE::', '');
if (fileName.startsWith('[') && fileName.endsWith(']')) {
files = JSON.parse(fileName);
}
else {
files = [fileName];
}
const orgId = options.orgId;
const chatflowid = options.chatflowid;
for (const file of files) {
if (!file)
continue;
const fileData = await (0, src_1.getFileFromStorage)(file, orgId, chatflowid);
const blob = new Blob([fileData]);
const loader = new JSONLoader(blob, pointers.length != 0 ? pointers : undefined, metadata);
if (textSplitter) {
let splittedDocs = await loader.load();
splittedDocs = await textSplitter.splitDocuments(splittedDocs);
docs.push(...splittedDocs);
}
else {
docs.push(...(await loader.load()));
}
}
}
else {
if (jsonFileBase64.startsWith('[') && jsonFileBase64.endsWith(']')) {
files = JSON.parse(jsonFileBase64);
}
else {
files = [jsonFileBase64];
}
for (const file of files) {
if (!file)
continue;
const splitDataURI = file.split(',');
splitDataURI.pop();
const bf = Buffer.from(splitDataURI.pop() || '', 'base64');
const blob = new Blob([bf]);
const loader = new JSONLoader(blob, pointers.length != 0 ? pointers : undefined, metadata);
if (textSplitter) {
let splittedDocs = await loader.load();
splittedDocs = await textSplitter.splitDocuments(splittedDocs);
docs.push(...splittedDocs);
}
else {
docs.push(...(await loader.load()));
}
}
}
if (metadata) {
let parsedMetadata = typeof metadata === 'object' ? metadata : JSON.parse(metadata);
parsedMetadata = removeValuesStartingWithSlash(parsedMetadata);
docs = docs.map((doc) => ({
...doc,
metadata: _omitMetadataKeys === '*'
? {
...parsedMetadata
}
: (0, lodash_1.omit)({
...doc.metadata,
...parsedMetadata
}, omitMetadataKeys)
}));
}
else {
docs = docs.map((doc) => ({
...doc,
metadata: _omitMetadataKeys === '*'
? {}
: (0, lodash_1.omit)({
...doc.metadata
}, omitMetadataKeys)
}));
}
if (output === 'document') {
return docs;
}
else {
let finaltext = '';
for (const doc of docs) {
finaltext += `${doc.pageContent}\n`;
}
return (0, src_1.handleEscapeCharacters)(finaltext, false);
}
}
}
const removeValuesStartingWithSlash = (obj) => {
const result = {};
for (const key in obj) {
const value = obj[key];
if (typeof value === 'string' && value.startsWith('/')) {
continue;
}
result[key] = value;
}
return result;
};
class TextLoader extends base_1.BaseDocumentLoader {
constructor(filePathOrBlob) {
super();
this.filePathOrBlob = filePathOrBlob;
}
async parse(raw) {
return [{ pageContent: raw, metadata: {} }];
}
async load() {
let text;
let metadata;
if (typeof this.filePathOrBlob === 'string') {
const { readFile } = await TextLoader.imports();
text = await readFile(this.filePathOrBlob, 'utf8');
metadata = { source: this.filePathOrBlob };
}
else {
text = await this.filePathOrBlob.text();
metadata = { source: 'blob', blobType: this.filePathOrBlob.type };
}
const parsed = await this.parse(text);
parsed.forEach((parsedData, i) => {
const { pageContent } = parsedData;
if (typeof pageContent !== 'string') {
throw new Error(`Expected string, at position ${i} got ${typeof pageContent}`);
}
});
return parsed.map((parsedData, i) => {
const { pageContent, metadata: additionalMetadata } = parsedData;
return new documents_1.Document({
pageContent,
metadata: parsed.length === 1
? { ...metadata, ...additionalMetadata }
: {
...metadata,
line: i + 1,
...additionalMetadata
}
});
});
}
static async imports() {
try {
const { readFile } = await Promise.resolve().then(() => __importStar(require('node:fs/promises')));
return { readFile };
}
catch (e) {
console.error(e);
throw new Error(`Failed to load fs/promises. Make sure you are running in Node.js environment.`);
}
}
}
class JSONLoader extends TextLoader {
constructor(filePathOrBlob, pointers = [], metadataMapping = {}) {
super(filePathOrBlob);
this.pointers = Array.isArray(pointers) ? pointers : [pointers];
if (metadataMapping) {
this.metadataMapping = typeof metadataMapping === 'object' ? metadataMapping : JSON.parse(metadataMapping);
}
}
async parse(raw) {
const json = JSON.parse(raw.trim());
const documents = [];
// Handle both single object and array of objects
const jsonArray = Array.isArray(json) ? json : [json];
for (const item of jsonArray) {
const content = this.extractContent(item);
const metadata = this.extractMetadata(item);
for (const pageContent of content) {
documents.push({
pageContent,
metadata
});
}
}
return documents;
}
/**
* Extracts content based on specified pointers or all strings if no pointers
*/
extractContent(json) {
const compiledPointers = this.pointers.map((pointer) => jsonpointer_1.default.compile(pointer));
return this.extractArrayStringsFromObject(json, compiledPointers, !(this.pointers.length > 0));
}
/**
* Extracts metadata based on the mapping configuration
*/
extractMetadata(json) {
let metadata = {};
if (this.metadataMapping) {
const values = Object.values(this.metadataMapping).filter((value) => typeof value === 'string' && value.startsWith('/'));
for (const value of values) {
if (value) {
const key = Object.keys(this.metadataMapping).find((key) => this.metadataMapping?.[key] === value);
if (key) {
metadata = {
...metadata,
[key]: jsonpointer_1.default.get(json, value)
};
}
}
}
}
return metadata;
}
/**
* If JSON pointers are specified, return all strings below any of them
* and exclude all other nodes expect if they match a JSON pointer.
* If no JSON pointer is specified then return all string in the object.
*/
extractArrayStringsFromObject(json, pointers, extractAllStrings = false, keyHasBeenFound = false) {
if (!json) {
return [];
}
if (typeof json === 'string' && extractAllStrings) {
return [json];
}
if (Array.isArray(json) && extractAllStrings) {
let extractedString = [];
for (const element of json) {
extractedString = extractedString.concat(this.extractArrayStringsFromObject(element, pointers, true));
}
return extractedString;
}
if (typeof json === 'object') {
if (extractAllStrings) {
return this.extractArrayStringsFromObject(Object.values(json), pointers, true);
}
const targetedEntries = this.getTargetedEntries(json, pointers);
const thisLevelEntries = Object.values(json);
const notTargetedEntries = thisLevelEntries.filter((entry) => !targetedEntries.includes(entry));
let extractedStrings = [];
if (targetedEntries.length > 0) {
for (const oneEntry of targetedEntries) {
extractedStrings = extractedStrings.concat(this.extractArrayStringsFromObject(oneEntry, pointers, true, true));
}
for (const oneEntry of notTargetedEntries) {
extractedStrings = extractedStrings.concat(this.extractArrayStringsFromObject(oneEntry, pointers, false, true));
}
}
else if (extractAllStrings || !keyHasBeenFound) {
for (const oneEntry of notTargetedEntries) {
extractedStrings = extractedStrings.concat(this.extractArrayStringsFromObject(oneEntry, pointers, extractAllStrings));
}
}
return extractedStrings;
}
return [];
}
getTargetedEntries(json, pointers) {
const targetEntries = [];
for (const pointer of pointers) {
const targetedEntry = pointer.get(json);
if (targetedEntry) {
targetEntries.push(targetedEntry);
}
}
return targetEntries;
}
}
module.exports = { nodeClass: Json_DocumentLoaders };
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