LCDP_web_apps/chat.html at master · kermit4/LCDP_web_apps · GitHub

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<html><head><title>real time chat over CJP2P</title></head>
        <body>
<div id=ethstuff hidden=true>
            you have to pick one of these, and can start messaging
when the bottom one filed<p>
    gnosis safe address <input id=safe_address size=60>
<br>their eth addr <input id=their_eth_addr size=80>
<button id="connect-btn">Connect an Ethereum Wallet if you want to message by eth address</button>
</div>
<br>their ed25519 addr<input id=their_ed25519 size=80>
        <p>Give this URL to the other person to chat with you:
        <p><a id=link href="" ></a>

<p>or do these other things with them:
        <p><a id=video href="">video call</a> --
         <a id=pong href="">play pong</a> --
         <a id=line_mode href="">switch to line by line chat (no javascript needed)</a>
<br><button id="single-btn">toggle single/dual window</button>
<br>
            <p><a href=/>return to network status page</a>

        <p>try /ping or /version

        <div style='display: flex; height: 70vh;'>
            <textarea id='input' style='width: 50%; height: 100%;' readonly></textarea>
            <textarea id='output' style='width: 50%; height: 100%;' readonly></textarea>
        </div>
<div id="saw-status" style="font-size:12px; padding:4px; color:#888;">Seen by them: never</div>
<br>
debuging :
<button onclick="logging=true">enable </button> (then scroll down)
<button onclick="logging=false">disable </button>

<script src="https://cdn.jsdelivr.net/npm/web3@1.8.0/dist/web3.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/ethers@6.13.0/dist/ethers.umd.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/ethers@6/dist/ethers.umd.min.js"></script>
<script>
    const logBox = document.createElement('div');
    logBox.id = 'log';
    logBox.style.cssText = 'font-family:monospace; font-size:12px; padding:8px; white-space:pre-wrap; word-break:break-all;';
    document.body.appendChild(logBox); // safe, no reset
    const logDiv = document.createElement('div');
    logDiv.id = 'log';
    logDiv.style.cssText = 'position:fixed; bottom:0; left:0; right:0; max-height:30vh; overflow:auto; background:#111; color:#0f0; font-family:monospace; font-size:12px; padding:4px; z-index:9999;';

    let logging=false;
    let logQueue = Promise.resolve();

    function log_always(...args) {
        const line = document.createElement('div');
        logQueue = logQueue.then(() => {
            line.textContent = `[${new Date().toLocaleTimeString()}] ${args.join(' ')}`;
                logBox.appendChild(line);
                while (logBox.children.length > 2000) {
                  logBox.removeChild(logBox.firstChild);
                }
                // window.scrollTo(0, document.body.scrollHeight);
            });
        }
    function log(...args) {
        if (logging)  log_always(args);
    }

    document.body.appendChild(logDiv);
    const signed_ed25519s = new Map();
    const safe_address  = document.getElementById('safe_address');
    const their_eth_addr  = document.getElementById('their_eth_addr');
    const their_ed25519 =   document.getElementById('their_ed25519');
    const input = document.getElementById('input');
    let output = document.getElementById('output');
    const link = document.getElementById('link');
    function update_links() {
        let url=location.origin+location.pathname;
        if (safe_address.value.length>1) {
            url += "?safe=" + safe_address.value;
            document.getElementById('ethstuff').hidden=false;
        }
        else if (my_eth_address!=null) {
            url += "?eth=" + my_eth_address;
            their_eth_addr.hidden=false;
            document.getElementById('ethstuff').hidden=false;
        }
        else {
            url += "?ed25519=" + my_ed25519;
        }
        link.href = url;
        link.textContent = url;
        document.getElementById('video').href =  "video.html?ed25519=" + their_ed25519.value;
        document.getElementById('pong').href =  "pong.html?ed25519=" + their_ed25519.value;
        document.getElementById('line_mode').href =  "/chat/" + their_ed25519.value;
    }
    function lsKey(ed, suffix) { return 'cjp2p_' + ed + '_' + suffix; }
    function saveChat() {
        const ed = their_ed25519.value;
        if (!ed) return;
        localStorage.setItem('cjp2p_last_ed25519', ed);
        localStorage.setItem(lsKey(ed, 'input'), input.value);
        localStorage.setItem(lsKey(ed, 'output'), document.getElementById('output').value);
    }
    function loadChat(ed) {
        if (!ed) return;
        const si = localStorage.getItem(lsKey(ed, 'input'));
        const so = localStorage.getItem(lsKey(ed, 'output'));
        if (si !== null) input.value = si;
        if (so !== null) document.getElementById('output').value = so;
    }

    function set_their_ed25519(ed25519) {
        input.readOnly = false;
        their_ed25519.value=ed25519;
        loadChat(ed25519);
        update_links();
    }
    let my_eth_address = null;

    function request_ed25519_from_eth_addr() {
        socket.send(JSON.stringify([{GetPubByEth:{eth_addr:their_eth_addr.value}}]));
    }
    async function getSigners() {
        if (safe_address.value.length == 0) {
            return;
        }
        const accounts = await window.ethereum.request({ method: 'eth_accounts' });
        my_eth_address = accounts[0];
        const provider = new ethers.BrowserProvider(window.ethereum)
        const abi = ["function getOwners() view returns (address[])"]
        const safe = new ethers.Contract(safe_address.value, abi, provider)
        const owners = await safe.getOwners()
        owners.forEach(function(v,k)  {
            if (v.toUpperCase()!=my_eth_address.toUpperCase()) {
                their_eth_addr.value = v;
                request_ed25519_from_eth_addr();
            }
        } );
    }

    async function sha256hex(text) {
        const buf = await crypto.subtle.digest('SHA-256', new TextEncoder().encode(text));
        return Array.from(new Uint8Array(buf)).map(b => b.toString(16).padStart(2, '0')).join('');
    }

    let lastReceivedHash = null;
    let lastSentHash = null;
    let seenTop = false;
    let seenBottom = false;
    let sawSent = false;
    const sawStatus = document.getElementById('saw-status');

    function updateScrollSeen() {
        const el = document.getElementById('output');
        if (el.scrollTop <= 1) seenTop = true;
        if (el.scrollTop + el.clientHeight >= el.scrollHeight - 1) seenBottom = true;
    }

    async function checkAndSendSaw() {
        updateScrollSeen();
        if (seenTop && seenBottom && !sawSent && lastReceivedHash && their_ed25519.value) {
//            sawSent = true;
            socket.send(JSON.stringify([{Forward:{to_ed25519:their_ed25519.value, messages:[{SawMessage:{hash:lastReceivedHash}}]}}]));
        }
    }

    document.getElementById('output').addEventListener('scroll', () => checkAndSendSaw());

    function updateSawStatus(receivedHash, receivedTime) {
        const timeStr = receivedTime.toLocaleTimeString();
        if (lastSentHash && receivedHash === lastSentHash) {
            sawStatus.textContent = 'Seen by them: ' + timeStr + ' \u2713';
            sawStatus.style.color = '#2a2';
        } else {
            sawStatus.textContent = 'Seen by them: ' + timeStr + ' (older message)';
            sawStatus.style.color = '#a80';
        }
    }

    let originalTitle = document.title;
    let blinkInterval;
    function notifyNewMessage() {
        let blinkCount = 0;
        clearInterval(blinkInterval);
        blinkInterval = setInterval(() => {
            document.title = (blinkCount % 2 === 0) ? "(New Message!) " + originalTitle : originalTitle;
            blinkCount++;
        }, 1000);
    };
    window.addEventListener('focus', () => {
        clearInterval(blinkInterval);
        document.title = originalTitle;
        checkAndSendSaw();
    });

    let my_ed25519_to_sign = null;
    let my_ed25519 = null;

    let single_window=false;
    document.getElementById('single-btn').addEventListener('click', async () => {
        if (!single_window) {
            single_window=true;
            output.style.width="0";
            output=input;
            output.style.width="100%";
        } else {
            single_window=false;
            output.style.width="50%";
            output = document.getElementById('output');
            output.style.width="50%";
        }
    });
    document.getElementById('connect-btn').addEventListener('click', async () => {
        if (!window.ethereum) {
            alert('Install MetaMask!');
            return;
        }
        const accounts = await window.ethereum.request({ method: 'eth_requestAccounts' });
        my_eth_address = accounts[0];
        if ( my_ed25519_to_sign  != null ) {
            let sig = await window.ethereum.request({
                method: 'personal_sign',
                params: ["my ed25519 public key is " + my_ed25519_to_sign,my_eth_address],
            });
            socket.send(JSON.stringify([{MyPublicKey:{ed25519h:my_ed25519,ed25519_eth_signed:sig}}]  ));
        }
        await getSigners();
        document.getElementById('connect-btn').disabled = true;
    });
    function str(obj) {
      if (obj instanceof Error) return `${obj.name}: ${obj.message}`;
      try { return JSON.stringify(obj, null, 2); }
      catch { return String(obj); }
    }
    window.onerror = (msg, url, line, col, err) => {
      log('ERROR:', msg, 'at', url + ':' + line + ':' + col);
      if (err && err.stack) log(err.stack);
        return false;
    };
    window.onunhandledrejection = e => {
      log('UNHANDLED PROMISE:', e.reason?.stack || e.reason || e);
    };

    ['log', 'warn', 'error', 'info'].forEach(k => {
      const orig = console[k].bind(console);
      console[k] = (...args) => {
        orig.apply(console, args); // still goes to real console if you have one
        log(k.toUpperCase() + ':',...args);
      };
    });

    let socket;

	function connect() {
		log("websocket connencting");
        const url = new URL('/wt', window.location.href);
        url.protocol = url.protocol.replace('http', 'ws');
        // use url to use the websocket on the page's source system, though some functionality is security restricted unless its wss:// (https)
		socket = new WebSocket("ws://localhost:24255/wt");
        socket.onclose = () => {
            console.log('Socket closed. Reconnecting ...');
            log("websocket reconnencting");
            setTimeout(connect, 200);
        };
		socket.onopen = () => {
			let work = Promise.resolve();
			socket.onmessage = async(event) => {
				work = work.then(async () => {
					log( "\n\n___________________n\n");
					log(event.data);
					let messages_ = JSON.parse(event.data);
					let messages;
					log( "\n\n==============\n\n");
					let src=null;
					let forwarded=false;
					if ("Forwarded" in messages_[0]) {
						src=messages_[0].Forwarded.from_ed25519;
						forwarded=true;
						messages = JSON.parse(messages_[0].Forwarded.messages);
						log( "\n" + messages_[0].Forwarded.messages);
					} else messages=messages_;
					log( "\n");
					for (i in messages) {
						let msg = messages[i]
						log("\n" + JSON.stringify(msg));
						if ("ChatMessage" in msg)  {
							txt = "NOT VERIFIED\n";
							if (
								their_ed25519.value == src
								|| their_ed25519.value == ("0x"+ src)
							) {
								txt = "VERIFIED ed25519 " + their_ed25519.value + "\n";
							} else {
								log("wrong key, wanted " + their_ed25519.value + " got " + src);
								return;
							}
							log("their ed25519 signature ",signed_ed25519s.get(src));
							log("signed by  eth addr",their_eth_addr.value);
							if (  signed_ed25519s.get(src) == their_eth_addr.value ) {
								txt += "VERIFIED eth " + their_eth_addr.value + "\n";
							}
							txt += "\n";
							txt += msg.ChatMessage.message;
							output.value = txt;
							saveChat();
							seenTop = false; seenBottom = false; sawSent = false;
							sha256hex(msg.ChatMessage.message).then(h => { lastReceivedHash = h; if (document.hasFocus()) checkAndSendSaw(); });
						}
						if ("SawMessage" in msg && forwarded) {
							updateSawStatus(msg.SawMessage.hash, new Date());
						}
						if ("MyPublicKey" in msg) {
							let mpk=msg.MyPublicKey;
							log("\n\n-- got mypublickey\n--myeth " + my_eth_address + "\n\n");
							log( "\n\n-- their_eth " + their_eth_addr.value + "\n\n");
							let sig = mpk.ed25519_eth_signed;
							log(  "\n\n-- sig: " + sig + "\n\n");
							let ed25519 = mpk.ed25519h;
							log(  "\n\n-- ed25519 sent this message (using Noise IK, verified on the node): " + ed25519 + "\n\n");
							let unsigned_message = "my ed25519 public key is " + ed25519
							let signer;
							try {
								  signer = ethers.verifyMessage(unsigned_message, sig);
							} catch (e) {
								  log('VERIFY FAILED:', e.message);
							}
							log(  "\n\n-- " + signer + " signed \"" + unsigned_message + "\"  --verified in browser\n\n");
							if (signer != null && their_eth_addr.value != null &&
								signer.toUpperCase() == their_eth_addr.value.toUpperCase()) {
								set_their_ed25519(ed25519);
								signed_ed25519s.set(ed25519,their_eth_addr.value);
								log(  "\n\n****** MATCHED their ed25519 " + their_ed25519.value + " signed by eth_addr: " + signer);
							}  else {
								log(  "\n\nnot the key we're looking for: " + signer +  " != " + their_eth_addr.value );
							}
						}
						if (!forwarded && "YourEd25519" in msg) {
							my_ed25519 = msg.YourEd25519.ed25519
							update_links();
						}
						if (!forwarded && "PleaseSignYourPub" in msg) {
							my_ed25519_to_sign = msg.PleaseSignYourPub.ed25519
							my_ed25519 = my_ed25519_to_sign;
							update_links();
						}
					}
				});
			};
			const params = new URLSearchParams(window.location.search)
			let old_way=true;
			params.forEach(function(v,k)  {
				log_always(k,"=",v);
				if (v!="")
					old_way=false;
				switch (k) {
					case "safe":
						safe_address.value=v;
                        document.getElementById('ethstuff').hidden=false;
						break;
					case "eth":
						their_eth_addr.value = v;
						request_ed25519_from_eth_addr();
                        document.getElementById('ethstuff').hidden=false;
						break;
					case "ed25519":
						set_their_ed25519(v);
				}
			});
			if (old_way) {
				const parts = window.location.href.split('?');
				if (parts.length > 1) {
					if (parts[1].length > 50) {
						set_their_ed25519(parts[1]);
					} else {
						safe_address.value=parts[1];
					}
				}
			}
            update_links();
		}
	}
	connect();
    their_eth_addr.addEventListener('input', () => {
        request_ed25519_from_eth_addr();
        their_ed25519.value = "";
        their_ed25519.disabled = true;
    });
    their_ed25519.addEventListener('input', () => {
        input.readOnly = false;
        update_links();
        saveChat();
    });
    input.addEventListener('input', () => {
        lines = input.value.split(/\r?\n/);
        while ( single_window
            && ( lines[0].startsWith("VERIFIED " )
                || lines[0].length==0)
        ) {
                lines.shift();
                log_always("len " + lines[0].length);
        }
        txt = lines.join('\n');
        socket.send(JSON.stringify([{Forward:{to_ed25519:their_ed25519.value,messages:[{ChatMessage:{message:txt}}]}}]  ));
        sha256hex(txt).then(h => {
            lastSentHash = h;
            sawStatus.style.color = '#888';
        });
        saveChat();
    });
</script>
    </body>
</html>