Add more nodes for agents, loaders

2026-06-28 21:00:58 +03:00 · 2023-04-10 13:56:44 +01:00
parent 05c86ff9c5
commit 58e06718d1
57 changed files with 1584 additions and 89 deletions
@@ -0,0 +1,90 @@
+import { INode, INodeData, INodeParams } from '../../../src/Interface'
+
+class Pdf_DocumentLoaders implements INode {
+    label: string
+    name: string
+    description: string
+    type: string
+    icon: string
+    category: string
+    baseClasses: string[]
+    inputs: INodeParams[]
+
+    constructor() {
+        this.label = 'Pdf File'
+        this.name = 'pdfFile'
+        this.type = 'PDF'
+        this.icon = 'pdf.svg'
+        this.category = 'Document Loaders'
+        this.description = `Load data from PDF files`
+        this.inputs = [
+            {
+                label: 'Pdf File',
+                name: 'pdfFile',
+                type: 'file',
+                fileType: '.pdf'
+            },
+            {
+                label: 'Text Splitter',
+                name: 'textSplitter',
+                type: 'TextSplitter',
+                optional: true
+            },
+            {
+                label: 'Usage',
+                name: 'usage',
+                type: 'options',
+                options: [
+                    {
+                        label: 'One document per page',
+                        name: 'perPage'
+                    },
+                    {
+                        label: 'One document per file',
+                        name: 'perFile'
+                    }
+                ],
+                default: 'perPage'
+            }
+        ]
+    }
+
+    async getBaseClasses(): Promise<string[]> {
+        return ['Document']
+    }
+
+    async init(nodeData: INodeData): Promise<any> {
+        const { PDFLoader } = await import('langchain/document_loaders')
+
+        const textSplitter = nodeData.inputs?.textSplitter
+        const pdfFileBase64 = nodeData.inputs?.pdfFile as string
+        const usage = nodeData.inputs?.usage as string
+
+        const splitDataURI = pdfFileBase64.split(',')
+        splitDataURI.pop()
+        const bf = Buffer.from(splitDataURI.pop() || '', 'base64')
+        const blob = new Blob([bf])
+
+        if (usage === 'perFile') {
+            const loader = new PDFLoader(blob, { splitPages: false })
+            if (textSplitter) {
+                const docs = await loader.loadAndSplit(textSplitter)
+                return docs
+            } else {
+                const docs = await loader.load()
+                return docs
+            }
+        } else {
+            const loader = new PDFLoader(blob)
+            if (textSplitter) {
+                const docs = await loader.loadAndSplit(textSplitter)
+                return docs
+            } else {
+                const docs = await loader.load()
+                return docs
+            }
+        }
+    }
+}
+
+module.exports = { nodeClass: Pdf_DocumentLoaders }