add JSON loader

2026-06-29 11:01:18 +03:00 · 2023-04-24 23:47:54 +07:00
parent 7a0935aa26
commit 244a0abed5
2 changed files with 81 additions and 0 deletions
@@ -0,0 +1,74 @@
+import { INode, INodeData, INodeParams } from '../../../src/Interface'
+import { TextSplitter } from 'langchain/text_splitter'
+import { JSONLoader } from 'langchain/document_loaders/fs/json'
+
+class Json_DocumentLoaders implements INode {
+    label: string
+    name: string
+    description: string
+    type: string
+    icon: string
+    category: string
+    baseClasses: string[]
+    inputs: INodeParams[]
+
+    constructor() {
+        this.label = 'Json File'
+        this.name = 'jsonFile'
+        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: 'Extracting multiple pointers',
+                placeholder: 'Enter pointers name',
+                optional: true
+            }
+        ]
+    }
+
+    async init(nodeData: INodeData): Promise<any> {
+        const textSplitter = nodeData.inputs?.textSplitter as TextSplitter
+        const jsonFileBase64 = nodeData.inputs?.jsonFile as string
+        const pointersName = nodeData.inputs?.pointersName as string
+        const splitDataURI = jsonFileBase64.split(',')
+        splitDataURI.pop()
+        const bf = Buffer.from(splitDataURI.pop() || '', 'base64')
+
+        let pointers: string[] = []
+        if (pointersName) {
+            const outputString = pointersName.replace(/[^a-zA-Z0-9,]+/g, ',')
+            pointers = outputString.split(',').map((pointer) => "/" + pointer.trim())
+        }
+
+        const blob = new Blob([bf])
+        const loader = new JSONLoader(blob, pointers.length != 0 ? pointers : undefined)
+
+        if (textSplitter) {
+            const docs = await loader.loadAndSplit(textSplitter)
+            return docs
+        } else {
+            const docs = await loader.load()
+            return docs
+        }
+    }
+}
+
+module.exports = { nodeClass: Json_DocumentLoaders }