File size: 5,693 Bytes
e1cc3bc | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 | /**
* @file App that demonstrates a few features using MCP Apps SDK + Solid.
*/
import {
App,
applyDocumentTheme,
applyHostFonts,
applyHostStyleVariables,
type McpUiHostContext,
} from "@modelcontextprotocol/ext-apps";
import type { CallToolResult } from "@modelcontextprotocol/sdk/types.js";
import { createEffect, createSignal, onMount, Show } from "solid-js";
import { render } from "solid-js/web";
import styles from "./mcp-app.module.css";
function extractTime(callToolResult: CallToolResult): string {
const { text } = callToolResult.content?.find((c) => c.type === "text")!;
return text;
}
function GetTimeApp() {
const [app, setApp] = createSignal<App | null>(null);
const [error, setError] = createSignal<Error | null>(null);
const [toolResult, setToolResult] = createSignal<CallToolResult | null>(null);
const [hostContext, setHostContext] = createSignal<McpUiHostContext | undefined>();
// Apply host styles reactively when hostContext changes
createEffect(() => {
const ctx = hostContext();
if (ctx?.theme) {
applyDocumentTheme(ctx.theme);
}
if (ctx?.styles?.variables) {
applyHostStyleVariables(ctx.styles.variables);
}
if (ctx?.styles?.css?.fonts) {
applyHostFonts(ctx.styles.css.fonts);
}
});
onMount(async () => {
const instance = new App({ name: "Get Time App", version: "1.0.0" });
instance.ontoolinput = async (input) => {
console.info("Received tool call input:", input);
};
instance.ontoolresult = async (result) => {
console.info("Received tool call result:", result);
setToolResult(result);
};
instance.ontoolcancelled = (params) => {
console.info("Tool call cancelled:", params.reason);
};
instance.onerror = console.error;
instance.onhostcontextchanged = (params) => {
setHostContext((prev) => ({ ...prev, ...params }));
};
try {
await instance.connect();
setApp(instance);
setHostContext(instance.getHostContext());
} catch (e) {
setError(e as Error);
}
});
return (
<Show when={!error()} fallback={<div><strong>ERROR:</strong> {error()!.message}</div>}>
<Show when={app()} fallback={<div>Connecting...</div>}>
<GetTimeAppInner app={app()!} toolResult={toolResult()} hostContext={hostContext()} />
</Show>
</Show>
);
}
interface GetTimeAppInnerProps {
app: App;
toolResult: CallToolResult | null;
hostContext?: McpUiHostContext;
}
function GetTimeAppInner(props: GetTimeAppInnerProps) {
const [serverTime, setServerTime] = createSignal("Loading...");
const [messageText, setMessageText] = createSignal("This is message text.");
const [logText, setLogText] = createSignal("This is log text.");
const [linkUrl, setLinkUrl] = createSignal("https://modelcontextprotocol.io/");
// Update serverTime when toolResult changes
createEffect(() => {
if (props.toolResult) {
setServerTime(extractTime(props.toolResult));
}
});
async function handleGetTime() {
try {
console.info("Calling get-time tool...");
const result = await props.app.callServerTool({ name: "get-time", arguments: {} });
console.info("get-time result:", result);
setServerTime(extractTime(result));
} catch (e) {
console.error(e);
setServerTime("[ERROR]");
}
}
async function handleSendMessage() {
const signal = AbortSignal.timeout(5000);
try {
console.info("Sending message text to Host:", messageText());
const { isError } = await props.app.sendMessage(
{ role: "user", content: [{ type: "text", text: messageText() }] },
{ signal },
);
console.info("Message", isError ? "rejected" : "accepted");
} catch (e) {
console.error("Message send error:", signal.aborted ? "timed out" : e);
}
}
async function handleSendLog() {
console.info("Sending log text to Host:", logText());
await props.app.sendLog({ level: "info", data: logText() });
}
async function handleOpenLink() {
console.info("Sending open link request to Host:", linkUrl());
const { isError } = await props.app.openLink({ url: linkUrl() });
console.info("Open link request", isError ? "rejected" : "accepted");
}
return (
<main
class={styles.main}
style={props.hostContext?.safeAreaInsets ? {
"padding-top": `${props.hostContext.safeAreaInsets.top}px`,
"padding-right": `${props.hostContext.safeAreaInsets.right}px`,
"padding-bottom": `${props.hostContext.safeAreaInsets.bottom}px`,
"padding-left": `${props.hostContext.safeAreaInsets.left}px`,
} : undefined}
>
<p class={styles.notice}>Watch activity in the DevTools console!</p>
<div class={styles.action}>
<p>
<strong>Server Time:</strong> <code id="server-time">{serverTime()}</code>
</p>
<button onClick={handleGetTime}>Get Server Time</button>
</div>
<div class={styles.action}>
<textarea value={messageText()} onInput={(e) => setMessageText(e.currentTarget.value)} />
<button onClick={handleSendMessage}>Send Message</button>
</div>
<div class={styles.action}>
<input type="text" value={logText()} onInput={(e) => setLogText(e.currentTarget.value)} />
<button onClick={handleSendLog}>Send Log</button>
</div>
<div class={styles.action}>
<input type="url" value={linkUrl()} onInput={(e) => setLinkUrl(e.currentTarget.value)} />
<button onClick={handleOpenLink}>Open Link</button>
</div>
</main>
);
}
render(() => <GetTimeApp />, document.getElementById("root")!);
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