dtamind-components
Version:
DTAmindai Components
379 lines • 15.6 kB
JavaScript
;
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var result = {};
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__setModuleDefault(result, mod);
return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
const lodash_1 = require("lodash");
const text_1 = require("langchain/document_loaders/fs/text");
const json_1 = require("langchain/document_loaders/fs/json");
const csv_1 = require("@langchain/community/document_loaders/fs/csv");
const pdf_1 = require("@langchain/community/document_loaders/fs/pdf");
const docx_1 = require("@langchain/community/document_loaders/fs/docx");
const base_1 = require("langchain/document_loaders/base");
const ExcelLoader_1 = require("../MicrosoftExcel/ExcelLoader");
const PowerpointLoader_1 = require("../MicrosoftPowerpoint/PowerpointLoader");
const storageUtils_1 = require("../../../src/storageUtils");
const utils_1 = require("../../../src/utils");
class File_DocumentLoaders {
constructor() {
this.label = 'File Loader';
this.name = 'fileLoader';
this.version = 2.0;
this.type = 'Document';
this.icon = 'file.svg';
this.category = 'Document Loaders';
this.description = `A generic file loader that can load different file types`;
this.baseClasses = [this.type];
this.inputs = [
{
label: 'File',
name: 'file',
type: 'file',
fileType: '*'
},
{
label: 'Text Splitter',
name: 'textSplitter',
type: 'TextSplitter',
optional: true
},
{
label: 'Pdf Usage',
name: 'usage',
type: 'options',
description: 'Only when loading PDF files',
options: [
{
label: 'One document per page',
name: 'perPage'
},
{
label: 'One document per file',
name: 'perFile'
}
],
default: 'perPage',
optional: true,
additionalParams: true
},
{
label: 'Use Legacy Build',
name: 'legacyBuild',
type: 'boolean',
description: 'Use legacy build for PDF compatibility issues',
optional: true,
additionalParams: true
},
{
label: 'JSONL Pointer Extraction',
name: 'pointerName',
type: 'string',
description: 'Only when loading JSONL files',
placeholder: '<pointerName>',
optional: true,
additionalParams: true
},
{
label: 'Additional Metadata',
name: 'metadata',
type: 'json',
description: 'Additional metadata to be added to the extracted documents',
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 fileBase64 = nodeData.inputs?.file;
const metadata = nodeData.inputs?.metadata;
const pdfUsage = nodeData.inputs?.pdfUsage || nodeData.inputs?.usage;
const legacyBuild = nodeData.inputs?.legacyBuild;
const pointerName = nodeData.inputs?.pointerName;
const _omitMetadataKeys = nodeData.inputs?.omitMetadataKeys;
const output = nodeData.outputs?.output;
let omitMetadataKeys = [];
if (_omitMetadataKeys) {
omitMetadataKeys = _omitMetadataKeys.split(',').map((key) => key.trim());
}
let files = [];
const fileBlobs = [];
//FILE-STORAGE::["CONTRIBUTING.md","LICENSE.md","README.md"]
const totalFiles = getOverrideFileInputs(nodeData) || fileBase64;
if (totalFiles.startsWith('FILE-STORAGE::')) {
const fileName = totalFiles.replace('FILE-STORAGE::', '');
if (fileName.startsWith('[') && fileName.endsWith(']')) {
files = JSON.parse(fileName);
}
else {
files = [fileName];
}
const orgId = options.orgId;
const chatflowid = options.chatflowid;
// specific to createAttachment to get files from chatId
const retrieveAttachmentChatId = options.retrieveAttachmentChatId;
if (retrieveAttachmentChatId) {
for (const file of files) {
if (!file)
continue;
const fileData = await (0, storageUtils_1.getFileFromStorage)(file, orgId, chatflowid, options.chatId);
const blob = new Blob([fileData]);
fileBlobs.push({ blob, ext: file.split('.').pop() || '' });
}
}
else {
for (const file of files) {
if (!file)
continue;
const fileData = await (0, storageUtils_1.getFileFromStorage)(file, orgId, chatflowid);
const blob = new Blob([fileData]);
fileBlobs.push({ blob, ext: file.split('.').pop() || '' });
}
}
}
else {
if (totalFiles.startsWith('[') && totalFiles.endsWith(']')) {
files = JSON.parse(totalFiles);
}
else {
files = [totalFiles];
}
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]);
let extension = '';
// eslint-disable-next-line no-useless-escape
const match = file.match(/^data:([A-Za-z-+\/]+);base64,/);
if (!match) {
// Fallback: check if there's a filename pattern at the end
const filenameMatch = file.match(/,filename:(.+\.\w+)$/);
if (filenameMatch && filenameMatch[1]) {
const filename = filenameMatch[1];
const fileExt = filename.split('.').pop() || '';
fileBlobs.push({
blob,
ext: fileExt
});
}
else {
fileBlobs.push({
blob,
ext: extension
});
}
}
else {
const mimeType = match[1];
fileBlobs.push({
blob,
ext: (0, utils_1.mapMimeTypeToExt)(mimeType)
});
}
}
}
const loader = new MultiFileLoader(fileBlobs, {
json: (blob) => new json_1.JSONLoader(blob),
jsonl: (blob) => new json_1.JSONLinesLoader(blob, '/' + pointerName.trim()),
txt: (blob) => new text_1.TextLoader(blob),
html: (blob) => new text_1.TextLoader(blob),
css: (blob) => new text_1.TextLoader(blob),
js: (blob) => new text_1.TextLoader(blob),
xml: (blob) => new text_1.TextLoader(blob),
md: (blob) => new text_1.TextLoader(blob),
csv: (blob) => new csv_1.CSVLoader(blob),
xls: (blob) => new ExcelLoader_1.LoadOfSheet(blob),
xlsx: (blob) => new ExcelLoader_1.LoadOfSheet(blob),
xlsm: (blob) => new ExcelLoader_1.LoadOfSheet(blob),
xlsb: (blob) => new ExcelLoader_1.LoadOfSheet(blob),
docx: (blob) => new docx_1.DocxLoader(blob),
doc: (blob) => new docx_1.DocxLoader(blob),
ppt: (blob) => new PowerpointLoader_1.PowerpointLoader(blob),
pptx: (blob) => new PowerpointLoader_1.PowerpointLoader(blob),
pdf: (blob) => pdfUsage === 'perFile'
? // @ts-ignore
new pdf_1.PDFLoader(blob, {
splitPages: false,
pdfjs: () =>
// @ts-ignore
legacyBuild ? Promise.resolve().then(() => __importStar(require('pdfjs-dist/legacy/build/pdf.js'))) : Promise.resolve().then(() => __importStar(require('pdf-parse/lib/pdf.js/v1.10.100/build/pdf.js')))
})
: // @ts-ignore
new pdf_1.PDFLoader(blob, {
pdfjs: () =>
// @ts-ignore
legacyBuild ? Promise.resolve().then(() => __importStar(require('pdfjs-dist/legacy/build/pdf.js'))) : Promise.resolve().then(() => __importStar(require('pdf-parse/lib/pdf.js/v1.10.100/build/pdf.js')))
}),
'': (blob) => new text_1.TextLoader(blob)
});
let docs = [];
if (textSplitter) {
docs = await loader.load();
docs = await textSplitter.splitDocuments(docs);
}
else {
docs = await loader.load();
}
if (metadata) {
const parsedMetadata = typeof metadata === 'object' ? metadata : JSON.parse(metadata);
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, utils_1.handleEscapeCharacters)(finaltext, false);
}
}
}
const getOverrideFileInputs = (nodeData) => {
const txtFileBase64 = nodeData.inputs?.txtFile;
const pdfFileBase64 = nodeData.inputs?.pdfFile;
const jsonFileBase64 = nodeData.inputs?.jsonFile;
const csvFileBase64 = nodeData.inputs?.csvFile;
const jsonlinesFileBase64 = nodeData.inputs?.jsonlinesFile;
const docxFileBase64 = nodeData.inputs?.docxFile;
const yamlFileBase64 = nodeData.inputs?.yamlFile;
const excelFileBase64 = nodeData.inputs?.excelFile;
const powerpointFileBase64 = nodeData.inputs?.powerpointFile;
const removePrefix = (storageFile) => {
const fileName = storageFile.replace('FILE-STORAGE::', '');
if (fileName.startsWith('[') && fileName.endsWith(']')) {
return JSON.parse(fileName);
}
return [fileName];
};
// If exists, combine all file inputs into an array
const files = [];
if (txtFileBase64) {
files.push(...removePrefix(txtFileBase64));
}
if (pdfFileBase64) {
files.push(...removePrefix(pdfFileBase64));
}
if (jsonFileBase64) {
files.push(...removePrefix(jsonFileBase64));
}
if (csvFileBase64) {
files.push(...removePrefix(csvFileBase64));
}
if (jsonlinesFileBase64) {
files.push(...removePrefix(jsonlinesFileBase64));
}
if (docxFileBase64) {
files.push(...removePrefix(docxFileBase64));
}
if (yamlFileBase64) {
files.push(...removePrefix(yamlFileBase64));
}
if (excelFileBase64) {
files.push(...removePrefix(excelFileBase64));
}
if (powerpointFileBase64) {
files.push(...removePrefix(powerpointFileBase64));
}
return files.length ? `FILE-STORAGE::${JSON.stringify(files)}` : '';
};
class MultiFileLoader extends base_1.BaseDocumentLoader {
constructor(fileBlobs, loaders) {
super();
this.fileBlobs = fileBlobs;
this.loaders = loaders;
if (Object.keys(loaders).length === 0) {
throw new Error('Must provide at least one loader');
}
}
async load() {
const documents = [];
for (const fileBlob of this.fileBlobs) {
const loaderFactory = this.loaders[fileBlob.ext];
if (loaderFactory) {
const loader = loaderFactory(fileBlob.blob);
documents.push(...(await loader.load()));
}
else {
const loader = new text_1.TextLoader(fileBlob.blob);
try {
documents.push(...(await loader.load()));
}
catch (error) {
throw new Error(`Error loading file`);
}
}
}
return documents;
}
}
module.exports = { nodeClass: File_DocumentLoaders };
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