Add web support

.gitignore

@@ -4,3 +4,6 @@
 
 # Ignore chat histories
 *.chat
+
+# The binary
+llamachat

db.go

@@ -17,6 +17,11 @@ var fs embed.FS
 var db *sql.DB
 
 func OpenDb(dbName string) {
+	if dbName == "" || dbName == "-" {
+		log.Println("Using in-memory database")
+		dbName = "memory"
+	}
+
 	var err error
 	db, err = sql.Open("sqlite3", fmt.Sprintf("file:%s.chat?_foreign_keys=on", dbName))
 	if err != nil {

go.mod

@@ -6,6 +6,7 @@ require (
 	github.com/elk-language/go-prompt v1.1.5
 	github.com/fatih/color v1.18.0
 	github.com/golang-migrate/migrate/v4 v4.18.1
+	github.com/gorilla/websocket v1.5.3
 	github.com/ollama/ollama v0.4.0
 )
 

go.sum

@@ -9,6 +9,8 @@ github.com/golang-migrate/migrate/v4 v4.18.1 h1:JML/k+t4tpHCpQTCAD62Nu43NUFzHY4C
 github.com/golang-migrate/migrate/v4 v4.18.1/go.mod h1:HAX6m3sQgcdO81tdjn5exv20+3Kb13cmGli1hrD6hks=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
+github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
 github.com/hashicorp/errwrap v1.0.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
 github.com/hashicorp/errwrap v1.1.0 h1:OxrOeh75EUXMY8TBjag2fzXGZ40LB6IKw45YeGUDY2I=
 github.com/hashicorp/errwrap v1.1.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=

main.go

@@ -1,18 +1,25 @@
 package main
 
 import (
+	"bytes"
 	"context"
+	"encoding/json"
 	"fmt"
 	"github.com/elk-language/go-prompt"
 	"github.com/fatih/color"
+	"github.com/gorilla/websocket"
 	"github.com/ollama/ollama/api"
+	"html/template"
+	"io"
 	"log"
+	"net/http"
 	"os"
 	"strings"
 )
 
 var conversation []api.Message
 var ollama *api.Client
+var upgrader = websocket.Upgrader{}
 
 func convertRole(role MessageType) string {
 	if role == MT_SYSTEM {
@@ -83,6 +90,14 @@ func onUserInput(input string) {
 		executeCommand(input)
 		return
 	}
+	sendPromptInput(input, func(r api.ChatResponse) error {
+		_, err := fmt.Print(r.Message.Content)
+		return err
+	})
+	fmt.Println()
+}
+
+func sendPromptInput(input string, handler func(response api.ChatResponse) error) {
 	err := SaveMessage(MT_USER, input)
 	if err != nil {
 		log.Fatal(err)
@@ -102,7 +117,10 @@ func onUserInput(input string) {
 	fullResponse := ""
 	respFunc := func(resp api.ChatResponse) error {
 		fullResponse = fullResponse + resp.Message.Content
-		fmt.Print(resp.Message.Content)
+		err := handler(resp)
+		if err != nil {
+			return err
+		}
 		if !resp.Done {
 			return nil
 		}
@@ -118,13 +136,87 @@ func onUserInput(input string) {
 		Role:    convertRole(MT_ASSISTANT),
 		Content: fullResponse,
 	})
-	fmt.Println()
+}
+
+func executeTemplate(w io.Writer, name string, data any) error {
+	t, err := template.
+		New("templates").
+		Funcs(template.FuncMap{
+			"trim": strings.TrimSpace,
+		}).
+		ParseGlob("templates/*.gohtml")
+	if err != nil {
+		return err
+	}
+	err = t.ExecuteTemplate(w, name, data)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func servePage(w http.ResponseWriter, _ *http.Request) {
+	wm := WebModel{}
+	wm.AddMessages(conversation)
+	err := executeTemplate(w, "index", wm)
+	if err != nil {
+		log.Println(err)
+	}
+}
+
+func serveWebSocket(w http.ResponseWriter, r *http.Request) {
+	log.Println("Websocket connected")
+	c, err := upgrader.Upgrade(w, r, nil)
+	if err != nil {
+		log.Println("upgrade: ", err)
+		return
+	}
+	defer c.Close()
+	for {
+		// Read the prompt
+		mt, message, err := c.ReadMessage()
+		if err != nil {
+			log.Println("Read error: ", err)
+			break
+		}
+		formInput := make(map[string]any)
+		err = json.Unmarshal(message, &formInput)
+		if err != nil {
+			log.Println("Unmarshal: ", err)
+			break
+		}
+		str, ok := formInput["message"].(string)
+		if !ok {
+			log.Println("Invalid user input: ", err)
+			break
+		}
+
+		// Send the request to Ollama
+		fullResponse := ""
+		firstResponse := true
+		sendPromptInput(str, func(response api.ChatResponse) error {
+			fullResponse = fullResponse + response.Message.Content
+			var content bytes.Buffer
+			err = executeTemplate(&content, "message", WebMessage{
+				Id:      len(conversation) + 1,
+				New:     firstResponse,
+				Replace: !firstResponse,
+				Content: fullResponse,
+			})
+			if err != nil {
+				return err
+			}
+			firstResponse = false
+			return c.WriteMessage(mt, content.Bytes())
+		})
+	}
 }
 
 func main() {
 	var err error
-	if len(os.Args) <= 1 {
+	dbName := ""
-		log.Fatal("Missing command line parameter")
+	if len(os.Args) > 1 {
+		dbName = os.Args[1]
 	}
 
 	ollama, err = api.ClientFromEnvironment()
@@ -132,10 +224,20 @@ func main() {
 		log.Fatal(err)
 	}
 
-	dbName := os.Args[1]
 	OpenDb(dbName)
 	conversation = loadMessageFromDb()
 
+	fs := http.FileServer(http.Dir("static"))
+	http.Handle("/static/", http.StripPrefix("/static/", fs))
+	http.HandleFunc("/", servePage)
+	http.HandleFunc("/ws", serveWebSocket)
+	go func() {
+		err := http.ListenAndServe(":8080", nil)
+		if err != nil {
+			log.Fatal(err)
+		}
+	}()
+
 	runner := prompt.New(
 		onUserInput,
 		prompt.WithTitle("llamachat"),

static/script.js

@@ -0,0 +1,12 @@
+function scrollToBottom() {
+    console.log("Scrolling");
+    window.scrollTo(0, document.body.scrollHeight);
+}
+
+window.onload = function() {
+    scrollToBottom();
+    htmx.config.allowNestedOobSwaps = false
+    htmx.config.wsReconnectDelay = function(retryCount) {
+        return 250;
+    }
+}

static/style.css

@@ -0,0 +1,26 @@
+body {
+	background-color: #e4faff;
+}
+
+.message {
+	border: 1px solid #000;
+	margin: 5px 0;
+	padding: 16px;
+}
+
+.content {
+	white-space: pre-wrap;
+}
+
+.content-box {
+	width: 80%;
+	margin: 0 auto;
+}
+
+.message-box {
+	margin: 64px 0 64px;
+}
+
+.message-input {
+	width: 100%;
+}

templates/index.gohtml

@@ -0,0 +1,35 @@
+{{- /*gotype:llamachat.WebPageModel*/ -}}
+{{define "index"}}
+<!DOCTYPE html>
+<html lang="en">
+<head>
+	<meta charset="UTF-8">
+	<title>Llamachat</title>
+	<link rel="stylesheet" href="static/style.css">
+    <script src="static/script.js" type="application/javascript"></script>
+    <script src="https://unpkg.com/htmx.org@2.0.3"></script>
+    <script src="https://unpkg.com/htmx-ext-ws@2.0.1/ws.js"></script>
+</head>
+<body hx-ext="ws">
+
+<div class="content-box" id="conversation" ws-connect="/ws" hx-on::ws-after-message="scrollToBottom();">
+    <div id="conversation">
+        {{range .Conversation}}
+            {{- /*gotype:llamachat.WebMessage*/ -}}
+            {{block "message-frag" .}}
+                <div class="message" id="message-{{.Id}}">
+                    <span class="content">{{ .Content }}</span>
+                </div>
+            {{end}}
+        {{end}}
+    </div>
+
+    <form class="message-box" id="message-box" ws-send>
+        <input id="message-input" name="message" type="text" placeholder="Type a message">
+        <input type="submit" value="Send">
+    </form>
+</div>
+
+</body>
+</html>
+{{end}}

templates/message.gohtml

@@ -0,0 +1,9 @@
+{{- /*gotype:llamachat.WebMessage*/ -}}
+{{define "message"}}
+    <div
+        {{if .New}} hx-swap-oob="beforebegin" id="message-box"
+        {{else if .Replace}} hx-swap-oob="outerHTML" id="message-{{.Id}}"
+        {{end}}>
+        {{template "message-frag" .}}
+    </div>
+{{end}}

webmodels.go

@@ -0,0 +1,31 @@
+package main
+
+import "github.com/ollama/ollama/api"
+
+type WebModel struct {
+	Conversation []WebMessage
+}
+
+type WebMessage struct {
+	Id      int
+	Replace bool
+	New     bool
+	Content string
+}
+
+func ConvertMessage(message api.Message, id int) WebMessage {
+	return WebMessage{
+		Id:      id,
+		Content: message.Content,
+	}
+}
+
+func (wm *WebModel) AddMessage(message api.Message, id int) {
+	wm.Conversation = append(wm.Conversation, ConvertMessage(message, id))
+}
+
+func (wm *WebModel) AddMessages(messages []api.Message) {
+	for id, message := range messages {
+		wm.AddMessage(message, id)
+	}
+}