LS Prompt Hub: Moving calls to server side and adding functionality to show the detailed prompt

packages/server/src/index.ts

@@ -64,6 +64,9 @@ import { ChatflowPool } from './ChatflowPool'
 import { CachePool } from './CachePool'
 import { ICommonObject, INodeOptionsValue } from 'flowise-components'
 import { createRateLimiter, getRateLimiter, initializeRateLimiter } from './utils/rateLimit'
+import axios from 'axios'
+import { Client } from 'langchainhub'
+import { parsePrompt } from './utils/hub'
 
 export class App {
     app: express.Application
@@ -1093,6 +1096,43 @@ export class App {
             await this.buildChatflow(req, res, undefined, true, true)
         })
 
+        // ----------------------------------------
+        // Prompt from Hub
+        // ----------------------------------------
+        this.app.post('/api/v1/load-prompt', async (req: Request, res: Response) => {
+            try {
+                const credential = await this.AppDataSource.getRepository(Credential).findOneBy({
+                    id: req.body.credential
+                })
+
+                if (!credential) return res.status(404).json({ error: `Credential ${req.body.credential} not found` })
+
+                // Decrypt credentialData
+                const decryptedCredentialData = await decryptCredentialData(credential.encryptedData, credential.credentialName, undefined)
+                let hub = new Client({ apiKey: decryptedCredentialData.langsmithApiKey, apiUrl: decryptedCredentialData.langsmithEndpoint })
+                const prompt = await hub.pull(req.body.promptName)
+                const templates = parsePrompt(prompt)
+
+                return res.json({ status: 'OK', prompt: req.body.promptName, templates: templates })
+            } catch (e: any) {
+                return res.json({ status: 'ERROR', prompt: req.body.promptName, error: e?.message })
+            }
+        })
+
+        this.app.post('/api/v1/prompts-list', async (req: Request, res: Response) => {
+            try {
+                const tags = req.body.tags ? `tags=${req.body.tags}` : ''
+                const url = `https://web.hub.langchain.com/repos/?${tags}offset=0&limit=20&has_commits=true&sort_field=num_likes&sort_direction=desc&is_archived=false`
+                axios.get(url).then((response) => {
+                    if (response.data.repos) {
+                        return res.json({ status: 'OK', repos: response.data.repos })
+                    }
+                })
+            } catch (e: any) {
+                return res.json({ status: 'ERROR', repos: [] })
+            }
+        })
+
         // ----------------------------------------
         // Prediction
         // ----------------------------------------

packages/server/src/utils/hub.ts

@@ -0,0 +1,27 @@
+export function parsePrompt(prompt: string): any[] {
+    const promptObj = JSON.parse(prompt)
+    let response = []
+    if (promptObj.kwargs.messages) {
+        promptObj.kwargs.messages.forEach((message: any) => {
+            let messageType = message.id.includes('SystemMessagePromptTemplate')
+                ? 'systemMessagePrompt'
+                : message.id.includes('HumanMessagePromptTemplate')
+                ? 'humanMessagePrompt'
+                : message.id.includes('AIMessagePromptTemplate')
+                ? 'aiMessagePrompt'
+                : 'template'
+            let template = message.kwargs.prompt.kwargs.template
+            response.push({
+                type: messageType,
+                template: template
+            })
+        })
+    } else if (promptObj.kwargs.template) {
+        let template = promptObj.kwargs.template
+        response.push({
+            type: 'template',
+            template: template
+        })
+    }
+    return response
+}