Support pdf ingestion

example/webui/app.go

@@ -1,12 +1,15 @@
 package main
 
 import (
+	"bytes"
 	"fmt"
 	"net/http"
+	"os"
 
 	. "github.com/mudler/local-agent-framework/agent"
 
 	"github.com/donseba/go-htmx"
+	"github.com/dslipak/pdf"
 	fiber "github.com/gofiber/fiber/v2"
 )
 
@@ -17,6 +20,54 @@ type (
 	}
 )
 
+func (a *App) KnowledgeBaseFile(db *InMemoryDatabase) func(c *fiber.Ctx) error {
+	return func(c *fiber.Ctx) error {
+		// https://golang.withcodeexample.com/blog/file-upload-handling-golang-fiber-guide/
+		// Handle file upload logic
+		file, err := c.FormFile("file")
+		if err != nil {
+			// Handle error
+			return err
+		}
+
+		payload := struct {
+			ChunkSize int `form:"chunk_size"`
+		}{}
+
+		if err := c.BodyParser(&payload); err != nil {
+			return err
+		}
+
+		os.MkdirAll("./uploads", os.ModePerm)
+
+		destination := fmt.Sprintf("./uploads/%s", file.Filename)
+		if err := c.SaveFile(file, destination); err != nil {
+			// Handle error
+			return err
+		}
+
+		fmt.Println("File uploaded to: " + destination)
+		fmt.Printf("Payload: %+v\n", payload)
+
+		content, err := readPdf(destination) // Read local pdf file
+		if err != nil {
+			panic(err)
+		}
+
+		fmt.Println("Content is", content)
+		chunkSize := defaultChunkSize
+		if payload.ChunkSize > 0 {
+			chunkSize = payload.ChunkSize
+		}
+
+		go StringsToKB(db, chunkSize, content)
+
+		_, err = c.WriteString(chatDiv("File uploaded", "gray"))
+
+		return err
+	}
+}
+
 func (a *App) KnowledgeBase(db *InMemoryDatabase) func(c *fiber.Ctx) error {
 	return func(c *fiber.Ctx) error {
 		payload := struct {
@@ -153,3 +204,17 @@ func (a *App) Chat(pool *AgentPool) func(c *fiber.Ctx) error {
 		return nil
 	}
 }
+
+func readPdf(path string) (string, error) {
+	r, err := pdf.Open(path)
+	if err != nil {
+		return "", err
+	}
+	var buf bytes.Buffer
+	b, err := r.GetPlainText()
+	if err != nil {
+		return "", err
+	}
+	buf.ReadFrom(b)
+	return buf.String(), nil
+}

example/webui/rag.go

@@ -127,6 +127,10 @@ func WebsiteToKB(website string, chunkSize int, db *InMemoryDatabase) {
 	fmt.Println("Found pages: ", len(content))
 	fmt.Println("ChunkSize: ", chunkSize)
 
+	StringsToKB(db, chunkSize, content...)
+}
+
+func StringsToKB(db *InMemoryDatabase, chunkSize int, content ...string) {
 	for _, c := range content {
 		chunks := splitParagraphIntoChunks(c, chunkSize)
 		fmt.Println("chunks: ", len(chunks))

example/webui/routes.go

@@ -55,6 +55,7 @@ func RegisterRoutes(webapp *fiber.App, pool *AgentPool, db *InMemoryDatabase, ap
 	webapp.Post("/create", app.Create(pool))
 	webapp.Get("/delete/:name", app.Delete(pool))
 	webapp.Post("/knowledgebase", app.KnowledgeBase(db))
+	webapp.Post("/knowledgebase/upload", app.KnowledgeBaseFile(db))
 
 	webapp.Get("/talk/:name", func(c *fiber.Ctx) error {
 		return c.Render("chat.html", fiber.Map{

example/webui/views/knowledgebase.html

@@ -29,6 +29,30 @@
             </button>
         </div>
     </form>
+
+    <form id='form' hx-encoding='multipart/form-data' hx-post='/knowledgebase/upload'>
+        <div class="mb-6">
+            <label for="file" class="block text-lg font-medium text-gray-400">File</label>
+            <input type='file' name='file' id='file' class="mt-1 focus:ring-indigo-500 focus:border-indigo-500 block w-full shadow-sm sm:text-lg border-gray-300 rounded-md bg-gray-700 text-white">
+        </div>
+        <div class="mb-6">
+            <label for="chunk_size" class="block text-lg font-medium text-gray-400">Chunk size</label>
+            <input type="text" name="chunk_size" id="chunk_size" class="mt-1 focus:ring-indigo-500 focus:border-indigo-500 block w-full shadow-sm sm:text-lg border-gray-300 rounded-md bg-gray-700 text-white" placeholder="380">
+        </div>
+        <div class="flex items-center justify-between">
+            <button type="submit" class="w-full flex justify-center py-2 px-4 border border-transparent rounded-md shadow-sm text-sm font-medium text-white bg-blue-500 hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500">
+                Upload file
+            </button>
+        </div>
+        <div class="mb-6">
+        <progress id='progress' value='0' max='100'></progress>
+        </div>
+    </form>
+    <script>
+        htmx.on('#form', 'htmx:xhr:progress', function(evt) {
+          htmx.find('#progress').setAttribute('value', evt.detail.loaded/evt.detail.total * 100)
+        });
+    </script>
 </div>
 </body>
 </html>