From c78ca494f57d1c6c8193d306b7b9b92942b66bfd Mon Sep 17 00:00:00 2001
From: vjsai <vijaysaijnv@gmail.com>
Date: Thu, 6 Jul 2023 18:28:33 +0530
Subject: [PATCH] Added OpenAPI chain

---
 .../nodes/chains/ApiChain/OpenAPIChain.ts     | 84 +++++++++++++++++++
 .../SqlDatabaseChain/SqlDatabaseChain.ts      |  2 +-
 packages/components/package.json              |  2 +-
 3 files changed, 86 insertions(+), 2 deletions(-)
 create mode 100644 packages/components/nodes/chains/ApiChain/OpenAPIChain.ts

diff --git a/packages/components/nodes/chains/ApiChain/OpenAPIChain.ts b/packages/components/nodes/chains/ApiChain/OpenAPIChain.ts
new file mode 100644
index 000000000..f0656f6dd
--- /dev/null
+++ b/packages/components/nodes/chains/ApiChain/OpenAPIChain.ts
@@ -0,0 +1,84 @@
+import { ICommonObject, INode, INodeData, INodeParams } from '../../../src/Interface'
+import { APIChain, createOpenAPIChain } from 'langchain/chains'
+import { CustomChainHandler, getBaseClasses } from '../../../src/utils'
+import { ChatOpenAI } from 'langchain/chat_models/openai'
+
+class OpenApiChain_Chains implements INode {
+    label: string
+    name: string
+    type: string
+    icon: string
+    category: string
+    baseClasses: string[]
+    description: string
+    inputs: INodeParams[]
+
+    constructor() {
+        this.label = 'OpenAPI Chain'
+        this.name = 'openApiChain'
+        this.type = 'openApiChain'
+        this.icon = 'apichain.svg'
+        this.category = 'Chains'
+        this.description = 'Chain to run queries against OpenAPI'
+        this.baseClasses = [this.type, ...getBaseClasses(APIChain)]
+        this.inputs = [
+            {
+                label: 'ChatOpenAI Model',
+                name: 'model',
+                type: 'ChatOpenAI'
+            },
+            {
+                label: 'YAML File',
+                name: 'yamlFile',
+                type: 'file',
+                fileType: '.yaml'
+            },
+            {
+                label: 'Headers',
+                name: 'headers',
+                type: 'json',
+                additionalParams: true,
+                optional: true
+            }
+        ]
+    }
+
+    async init(nodeData: INodeData): Promise<any> {
+        const model = nodeData.inputs?.model as ChatOpenAI
+        const headers = nodeData.inputs?.headers as Record<string, string>
+        const yamlFileBase64 = nodeData.inputs?.yamlFile as string
+        const splitDataURI = yamlFileBase64.split(',')
+        splitDataURI.pop()
+        const bf = Buffer.from(splitDataURI.pop() || '', 'base64')
+        const utf8String = bf.toString('utf-8')
+        const chain = await createOpenAPIChain(utf8String, {
+            llm: model,
+            headers
+        })
+        return chain
+    }
+
+    async run(nodeData: INodeData, input: string, options: ICommonObject): Promise<string> {
+        const model = nodeData.inputs?.model as ChatOpenAI
+        const headers = nodeData.inputs?.headers as Record<string, string>
+        const yamlFileBase64 = nodeData.inputs?.yamlFile as string
+        const splitDataURI = yamlFileBase64.split(',')
+        splitDataURI.pop()
+        const bf = Buffer.from(splitDataURI.pop() || '', 'base64')
+        const utf8String = bf.toString('utf-8')
+        const chain = await createOpenAPIChain(utf8String, {
+            llm: model,
+            headers
+        })
+        if (options.socketIO && options.socketIOClientId) {
+            const handler = new CustomChainHandler(options.socketIO, options.socketIOClientId, 2)
+            const res = await chain.run(input, [handler])
+            return res
+        } else {
+            const res = await chain.run(input)
+            return res
+        }
+    }
+}
+
+module.exports = { nodeClass: OpenApiChain_Chains }
diff --git a/packages/components/nodes/chains/SqlDatabaseChain/SqlDatabaseChain.ts b/packages/components/nodes/chains/SqlDatabaseChain/SqlDatabaseChain.ts
index 27a245e1a..441ec4cd2 100644
--- a/packages/components/nodes/chains/SqlDatabaseChain/SqlDatabaseChain.ts
+++ b/packages/components/nodes/chains/SqlDatabaseChain/SqlDatabaseChain.ts
@@ -1,5 +1,5 @@
 import { ICommonObject, INode, INodeData, INodeParams } from '../../../src/Interface'
-import { SqlDatabaseChain, SqlDatabaseChainInput } from 'langchain/chains'
+import { SqlDatabaseChain, SqlDatabaseChainInput } from 'langchain/chains/sql_db'
 import { CustomChainHandler, getBaseClasses } from '../../../src/utils'
 import { DataSource } from 'typeorm'
 import { SqlDatabase } from 'langchain/sql_db'
diff --git a/packages/components/package.json b/packages/components/package.json
index a5f03e10e..3e5f540b9 100644
--- a/packages/components/package.json
+++ b/packages/components/package.json
@@ -35,7 +35,7 @@
         "form-data": "^4.0.0",
         "graphql": "^16.6.0",
         "html-to-text": "^9.0.5",
-        "langchain": "^0.0.96",
+        "langchain": "^0.0.103",
         "linkifyjs": "^4.1.1",
         "mammoth": "^1.5.1",
         "moment": "^2.29.3",