Merge pull request #388 from ivalkshfoeif/feature/jsonlines-loader

Feature/JSON Lines loader

Author: HenryHengZJ

packages/components/nodes/documentloaders/Jsonlines/Jsonlines.ts

@@ -0,0 +1,106 @@
+import { INode, INodeData, INodeParams } from '../../../src/Interface'
+import { TextSplitter } from 'langchain/text_splitter'
+import { JSONLinesLoader } from 'langchain/document_loaders/fs/json'
+
+class Jsonlines_DocumentLoaders implements INode {
+    label: string
+    name: string
+    description: string
+    type: string
+    icon: string
+    category: string
+    baseClasses: string[]
+    inputs: INodeParams[]
+
+    constructor() {
+        this.label = 'Json Lines File'
+        this.name = 'jsonlinesFile'
+        this.type = 'Document'
+        this.icon = 'jsonlines.svg'
+        this.category = 'Document Loaders'
+        this.description = `Load data from JSON Lines files`
+        this.baseClasses = [this.type]
+        this.inputs = [
+            {
+                label: 'Jsonlines File',
+                name: 'jsonlinesFile',
+                type: 'file',
+                fileType: '.jsonl'
+            },
+            {
+                label: 'Text Splitter',
+                name: 'textSplitter',
+                type: 'TextSplitter',
+                optional: true
+            },
+            {
+                label: 'Pointer Extraction',
+                name: 'pointerName',
+                type: 'string',
+                placeholder: 'Enter pointer name',
+                optional: false
+            },
+            {
+                label: 'Metadata',
+                name: 'metadata',
+                type: 'json',
+                optional: true,
+                additionalParams: true
+            }
+        ]
+    }
+
+    async init(nodeData: INodeData): Promise<any> {
+        const textSplitter = nodeData.inputs?.textSplitter as TextSplitter
+        const jsonLinesFileBase64 = nodeData.inputs?.jsonlinesFile as string
+        const pointerName = nodeData.inputs?.pointerName as string
+        const metadata = nodeData.inputs?.metadata
+
+        let alldocs = []
+        let files: string[] = []
+
+        let pointer = '/' + pointerName.trim()
+
+        if (jsonLinesFileBase64.startsWith('[') && jsonLinesFileBase64.endsWith(']')) {
+            files = JSON.parse(jsonLinesFileBase64)
+        } else {
+            files = [jsonLinesFileBase64]
+        }
+
+        for (const file of files) {
+            const splitDataURI = file.split(',')
+            splitDataURI.pop()
+            const bf = Buffer.from(splitDataURI.pop() || '', 'base64')
+            const blob = new Blob([bf])
+            const loader = new JSONLinesLoader(blob, pointer)
+
+            if (textSplitter) {
+                const docs = await loader.loadAndSplit(textSplitter)
+                alldocs.push(...docs)
+            } else {
+                const docs = await loader.load()
+                alldocs.push(...docs)
+            }
+        }
+
+        if (metadata) {
+            const parsedMetadata = typeof metadata === 'object' ? metadata : JSON.parse(metadata)
+            let finaldocs = []
+            for (const doc of alldocs) {
+                const newdoc = {
+                    ...doc,
+                    metadata: {
+                        ...doc.metadata,
+                        ...parsedMetadata
+                    }
+                }
+                finaldocs.push(newdoc)
+            }
+            return finaldocs
+        }
+
+        return alldocs
+    }
+}
+
+module.exports = { nodeClass: Jsonlines_DocumentLoaders }