From 244a0abed5a65dbeb480568899e288d985518b62 Mon Sep 17 00:00:00 2001
From: chungyau97 <chungyau97@gmail.com>
Date: Mon, 24 Apr 2023 23:47:54 +0700
Subject: [PATCH] add JSON loader

---
 .../nodes/documentloaders/Json/Json.ts        | 74 +++++++++++++++++++
 .../nodes/documentloaders/Json/json.svg       |  7 ++
 2 files changed, 81 insertions(+)
 create mode 100644 packages/components/nodes/documentloaders/Json/Json.ts
 create mode 100644 packages/components/nodes/documentloaders/Json/json.svg

diff --git a/packages/components/nodes/documentloaders/Json/Json.ts b/packages/components/nodes/documentloaders/Json/Json.ts
new file mode 100644
index 000000000..f928b3f40
--- /dev/null
+++ b/packages/components/nodes/documentloaders/Json/Json.ts
@@ -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 }
diff --git a/packages/components/nodes/documentloaders/Json/json.svg b/packages/components/nodes/documentloaders/Json/json.svg
new file mode 100644
index 000000000..c27646e2d
--- /dev/null
+++ b/packages/components/nodes/documentloaders/Json/json.svg
@@ -0,0 +1,7 @@
+<svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-json" width="24" height="24" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round">
+   <path stroke="none" d="M0 0h24v24H0z" fill="none"></path>
+   <path d="M20 16v-8l3 8v-8"></path>
+   <path d="M15 8a2 2 0 0 1 2 2v4a2 2 0 1 1 -4 0v-4a2 2 0 0 1 2 -2z"></path>
+   <path d="M1 8h3v6.5a1.5 1.5 0 0 1 -3 0v-.5"></path>
+   <path d="M7 15a1 1 0 0 0 1 1h1a1 1 0 0 0 1 -1v-2a1 1 0 0 0 -1 -1h-1a1 1 0 0 1 -1 -1v-2a1 1 0 0 1 1 -1h1a1 1 0 0 1 1 1"></path>
+</svg>
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