provide REST APIs to read from the SQLite DB and poll for updates

gun-with-cancel.js

@@ -0,0 +1,26 @@
+module.exports = function patchGunWithCancel(Gun) {
+  Gun.chain.onWithCancel = (function() {
+    function cancelCallback(data,key,msg,ev) {
+      if (ev && typeof ev.off === 'function') {
+        ev.off();
+      }
+    }
+
+    return function(tag, arg, eas, as) {
+      if (typeof tag === 'function') {
+        let callback = tag;
+        const cancelEv = function() {
+          callback = cancelCallback;
+        };
+        const wrapper = function() {
+          return callback.apply(this, arguments);
+        };
+        this.on(wrapper, arg, eas, as);
+        return cancelEv;
+      } else {
+        this.on(tag, arg, eas, as);
+        return null;
+      }
+    };
+  })();
+};

index.js

@@ -1,45 +1,34 @@
-var config = { port: process.env.OPENSHIFT_NODEJS_PORT || process.env.VCAP_APP_PORT || process.env.PORT || process.argv[2] || 8765 };
+'use strict';
 
 var fs = require('fs');
 var Gun = require('gun');
 var SEA = require('gun/sea');
 var NTS = require('gun/nts');
 var rtc = require('gun/lib/webrtc');
-
 var sqlite3 = require('./sqlite3-promises');
+var express = require('express');
 
-if(process.env.HTTPS_KEY){
+require('./gun-with-cancel')(Gun);
+
+const POLLING_TIMEOUT = 60000/*ms*/;
+
+const app = express();
+
+var config = { port: process.env.OPENSHIFT_NODEJS_PORT || process.env.VCAP_APP_PORT || process.env.PORT || process.argv[2] || 8765 };
+
+if (process.env.HTTPS_KEY) {
   config.key = fs.readFileSync(process.env.HTTPS_KEY);
   config.cert = fs.readFileSync(process.env.HTTPS_CERT);
-  config.server = require('https').createServer(config, Gun.serve(__dirname));
+  config.server = require('https').createServer(config, app);
 } else {
-  config.server = require('http').createServer(Gun.serve(__dirname));
+  config.server = require('http').createServer(app);
 }
 
-Gun.chain.onWithCancel = (function() {
+var gun = Gun({
-  function cancelCallback(data,key,msg,ev) {
+  web: config.server,
-    if (ev && typeof ev.off === 'function') {
+  peers: ['https://jessemcdonald.info/gun'],
-      ev.off();
+});
-    }   
+console.log('Relay peer started on port ' + config.port + ' with /gun');
-  }   
-
-  return function(tag, arg, eas, as) {
-    if (typeof tag === 'function') {
-      let callback = tag;
-      const cancelEv = function() {
-        callback = cancelCallback;
-      };  
-      const wrapper = function() {
-        return callback.apply(this, arguments);
-      };  
-      this.on(wrapper, arg, eas, as);
-      return cancelEv;
-    } else {
-      this.on(tag, arg, eas, as);
-      return null;
-    }   
-  };  
-})();
 
 var appendJournal = (function() {
   let lastJournalText = null;
@@ -51,12 +40,6 @@ var appendJournal = (function() {
   };
 })();
 
-var gun = Gun({
-  web: config.server.listen(config.port),
-  peers: ['https://jessemcdonald.info/gun'],
-});
-console.log('Relay peer started on port ' + config.port + ' with /gun');
-
 function logIn(msg){
   console.log(`in msg:${JSON.stringify(msg)}.........`);
 }
@@ -88,72 +71,181 @@ function logDbError(label) {
 const dbInit = (async function dbInit() {
   const db = await sqlite3.openAsync('./pacosako.db');
 
-  await db.runAsync(`
+  try {
-    CREATE TABLE IF NOT EXISTS games (
+    await db.runAsync(`VACUUM`);
-      gameId TEXT PRIMARY KEY,
+  } catch(err) {
-      board TEXT
+    logDbError('vacuum')(err);
-    )
+  }
-  `);
 
   await db.runAsync(`
-    CREATE TABLE IF NOT EXISTS meta (
+    CREATE TABLE IF NOT EXISTS games (
       gameId TEXT PRIMARY KEY,
       lightName TEXT NOT NULL,
       darkName TEXT NOT NULL,
       moves INTEGER NOT NULL,
-      status TEXT,
+      status TEXT NOT NULL,
-      timestamp INTEGER NOT NULL
+      timestamp INTEGER NOT NULL,
+      board TEXT NOT NULL,
+      added INTEGER NOT NULL,
+      modified INTEGER NOT NULL
     )
   `);
 
+  await db.runAsync(`
+    CREATE INDEX IF NOT EXISTS games_timestamp ON games(timestamp)
+  `);
+
+  await db.runAsync(`
+    CREATE INDEX IF NOT EXISTS games_modified ON games(modified)
+  `);
+
   console.log('Connected to the SQLite database.');
 
   return db;
 })().catch(logDbError('dbInit'));
 
+function pruneEmpty(obj) {
+  const copy = {};
+  for (const key in obj) {
+    const val = obj[key];
+    if (val !== undefined && val !== null && val !== '') {
+      copy[key] = obj[key];
+    }
+  }
+  return copy;
+}
+
 async function logAllMeta() {
   const db = await dbInit;
   try {
-    for await (const row of db.eachAsync(`SELECT * FROM meta ORDER BY timestamp DESC`)) {
+    const querySql = `
-      console.log(JSON.stringify(row));
+      SELECT gameId, lightName, darkName, moves, status, timestamp FROM games ORDER BY timestamp DESC
+    `;
+    for await (const row of db.eachAsync(querySql)) {
+      console.log(JSON.stringify(pruneEmpty(row)));
     }
   } catch(err) {
     logDbError('logAllMeta')(err);
   }
 }
 
+let waitingAnyGame = null;
+const waitingGames = {};
+
+function signalGameUpdate(gameId) {
+  const promise = waitingGames[gameId];
+  if (promise) {
+    delete waitingGames[gameId];
+    promise.resolve();
+  }
+  const anyPromise = waitingAnyGame;
+  if (anyPromise) {
+    waitingAnyGame = null;
+    anyPromise.resolve();
+  }
+}
+
+function waitForGameUpdate(gameId) {
+  let promise = waitingGames[gameId];
+  if (promise === undefined) {
+    let resolve;
+    promise = waitingGames[gameId] = new Promise((res) => { resolve = res; });
+    promise.resolve = resolve;
+  }
+  return promise;
+}
+
+function waitForAnyGameUpdate() {
+  if (waitingAnyGame === null) {
+    let resolve;
+    waitingAnyGame = new Promise((res) => { resolve = res; });
+    waitingAnyGame.resolve = resolve;
+  }
+  return waitingAnyGame;
+}
+
+function waitFor(duration) {
+  return new Promise((resolve, reject) => setTimeout(() => { resolve(); }, duration));
+}
+
 //logAllMeta();
 
-async function updateMeta(gameId, meta) {
+function checkString(value, label, dflt) {
+  try {
+    if (arguments.length >= 3 && (value === undefined || value === null)) {
+      return dflt;
+    } else if (typeof value === 'string') {
+      return value;
+    }
+  } catch (err) {}
+  throw { message: `${label || 'value'} should be a string` };
+}
+
+function checkInteger(value, label, dflt) {
+  try {
+    if (arguments.length >= 3 && (value === undefined || value === null)) {
+      return dflt;
+    } else if (Number.isInteger(value)) {
+      return value;
+    }
+  } catch(err) {}
+  throw { message: `${label || 'value'} should be an integer` };
+}
+
+async function updateMeta(gameId, meta, time) {
+  if (arguments.length < 3) {
+    time = +new Date();
+  }
+
   const db = await dbInit;
 
-  const insertSql =
+  const insertSql = `
-    `INSERT OR REPLACE INTO meta
+    INSERT INTO games (gameId, lightName, darkName, moves, status, timestamp, board, added, modified)
-        ( gameId,  lightName,  darkName,  moves,  status,  timestamp)
+      VALUES ($gameId, $lightName, $darkName, $moves, $status, $timestamp, '', $time, $time)
-     VALUES
+    ON CONFLICT (gameId) DO UPDATE
-        ($gameId, $lightName, $darkName, $moves, $status, $timestamp)`;
+      SET lightName = $lightName, darkName = $darkName, moves = $moves,
+          status = $status, timestamp = $timestamp, modified = $time
+      WHERE (lightName <> $lightName OR darkName <> $darkName OR moves <> $moves OR
+              status <> $status OR timestamp <> $timestamp)
+        AND modified < $time
+  `;
   await db.runAsync(insertSql, {
     $gameId: gameId,
-    $lightName: String(meta.lightName || ''),
+    $lightName: checkString(meta.lightName, 'meta.lightName', ''),
-    $darkName: String(meta.darkName || ''),
+    $darkName: checkString(meta.darkName, 'meta.darkName', ''),
-    $moves: Number(meta.moves) || 0,
+    $moves: checkInteger(meta.moves, 'meta.moves', 0),
-    $status: (meta.status ? String(meta.status) : null),
+    $status: checkString(meta.status, 'meta.status', ''),
-    $timestamp: Number(meta.timestamp) || 0,
+    $timestamp: checkInteger(meta.timestamp, 'meta.timestamp', 0),
+    $time: time,
   });
 
+  signalGameUpdate(gameId);
+
   return db;
 }
 
-async function updateGame(gameId, moves) {
+async function updateGame(gameId, moves, time) {
+  if (arguments.length < 3) {
+    time = +new Date();
+  }
+
   const db = await dbInit;
 
-  const insertSql =
+  const insertSql = `
-    `INSERT OR REPLACE INTO games (gameId, board) VALUES ($gameId, $board)`;
+    INSERT INTO games (gameId, lightName, darkName, moves, status, timestamp, board, added, modified)
+      VALUES ($gameId, '', '', 0, '', 0, '', $time, $time)
+    ON CONFLICT (gameId) DO UPDATE
+      SET board = $board, modified = $time
+      WHERE (board <> $board) AND modified < $time
+  `;
   await db.runAsync(insertSql, {
     $gameId: gameId,
     $board: JSON.stringify(moves),
+    $time: time,
   });
 
+  signalGameUpdate(gameId);
+
   return db;
 }
 
@@ -211,3 +303,185 @@ gun.get(PacoSakoUUID + '/meta').on(function(meta) {
     }
   }
 }, { change: true });
+
+function internalErrorJson(err, res) {
+  res.status(500);
+  if (err && 'message' in err) {
+    console.error(err.message);
+    res.json({ message: 'internal error: ' + err.message });
+  } else {
+    console.error(err);
+    res.json({ message: 'internal error' });
+  }
+}
+
+async function getGameListHandler(req, res, next) {
+  res.set('Cache-Control', 'no-store');
+  try {
+    const afterTime = req.params.afterTime;
+
+    if (afterTime !== undefined && !afterTime.match(/^\d+$/)) {
+      res.status(400).json({ message: 'malformed time' });
+      return;
+    }
+
+    const pollTimeout = waitFor(POLLING_TIMEOUT).then(() => 'timeout').catch(()=>{});
+
+    while (true) {
+      /* Save the async promise _before_ the query so we don't miss any updates while suspended. */
+      const gameUpdate = waitForAnyGameUpdate().then(() => 'update');
+
+      const cutoff = (+new Date()) - (2 * 7 * 24 * 3600 * 1000);  /* 2 weeks ago */
+      const whereClause = (afterTime === undefined) ? `true` : `modified > $afterTime`;
+      const querySql = `
+        SELECT gameId, lightName, darkName, moves, status, timestamp, modified
+        FROM games WHERE timestamp >= $cutoff AND ${whereClause} ORDER BY timestamp DESC
+        LIMIT 1000
+      `;
+      const results = await (await dbInit).allAsync(querySql, {
+        $afterTime: checkInteger(Number(afterTime), 'afterTime', 0),
+        $cutoff: cutoff,
+      });
+
+      if (afterTime === undefined || results.length > 0) {
+        let lastModified = afterTime || 0;
+        for (const result of results) {
+          if (result.modified > lastModified) {
+            lastModified = result.modified;
+          }
+        }
+
+        res.json({ games: results.map(pruneEmpty), modified: lastModified });
+        return;
+      }
+
+      if (await Promise.race([gameUpdate, pollTimeout]) === 'timeout') {
+        res.status(204).json({ retry: true });
+        return;
+      }
+    }
+  } catch (err) {
+    internalErrorJson(err, res);
+  }
+}
+
+async function getGameHandler(req, res, next) {
+  res.set('Cache-Control', 'no-store');
+  try {
+    const gameId = req.params.gameId;
+    const afterTime = req.params.afterTime;
+
+    if (!gameId.match(/^[0-9a-f]{16}$/)) {
+      res.status(400).json({ message: 'malformed game ID' });
+      return;
+    }
+
+    if (afterTime !== undefined && !afterTime.match(/^\d+$/)) {
+      res.status(400).json({ message: 'malformed time' });
+      return;
+    }
+
+    const pollTimeout = waitFor(POLLING_TIMEOUT).then(() => 'timeout').catch(()=>{});
+
+    while (true) {
+      /* Save the async promise _before_ the query so we don't miss any updates while suspended. */
+      const gameUpdate = waitForGameUpdate(gameId).then(() => 'update');
+
+      const querySql = `
+        SELECT board, modified FROM games WHERE gameId = $gameId
+      `;
+      const result = await (await dbInit).getAsync(querySql, { $gameId: gameId });
+
+      if (!result) {
+        res.status(404).json({ message: 'unknown game ID' });
+        return;
+      }
+
+      if (afterTime === undefined || result.modified > afterTime) {
+        const parsed = (result.board === '') ? null : JSON.parse(result.board);
+        res.json({ board: parsed, modified: result.modified });
+        return;
+      }
+
+      if (await Promise.race([gameUpdate, pollTimeout]) === 'timeout') {
+        res.status(204).json({ retry: true });
+        return;
+      }
+    }
+  } catch(err) {
+    internalErrorJson(err, res);
+  }
+}
+
+async function getMetaHandler(req, res, next) {
+  res.set('Cache-Control', 'no-store');
+  try {
+    const gameId = req.params.gameId;
+    const afterTime = req.params.afterTime;
+
+    if (!gameId.match(/^[0-9a-f]{16}$/)) {
+      res.status(400).json({ message: 'malformed game ID' });
+      return;
+    }
+
+    if (afterTime !== undefined && !afterTime.match(/^\d+$/)) {
+      res.status(400).json({ message: 'malformed time' });
+      return;
+    }
+
+    const pollTimeout = waitFor(POLLING_TIMEOUT).then(() => 'timeout').catch(()=>{});
+
+    while (true) {
+      /* Save the async promise _before_ the query so we don't miss any updates while suspended. */
+      const metaUpdate = waitForGameUpdate(gameId).then(() => 'update');
+
+      const querySql = `
+        SELECT lightName, darkName, moves, status, timestamp, modified FROM games
+        WHERE gameId = $gameId
+      `;
+      const result = await (await dbInit).getAsync(querySql, { $gameId: gameId });
+
+      if (!result) {
+        res.status(404).json({ message: 'unknown game ID' });
+        return;
+      }
+
+      if (afterTime === undefined || result.modified > afterTime) {
+        res.json(pruneEmpty(result));
+        return;
+      }
+
+      if (await Promise.race([metaUpdate, pollTimeout]) === 'timeout') {
+        res.status(204).json({ retry: true });
+        return;
+      }
+    }
+  } catch (err) {
+    internalErrorJson(err, res);
+  }
+}
+
+app.get('/pacosako/api/games/poll/:afterTime', getGameListHandler);
+app.get('/pacosako/api/games', getGameListHandler);
+
+app.get('/pacosako/api/game/:gameId/poll/:afterTime', getGameHandler);
+app.get('/pacosako/api/game/:gameId', getGameHandler);
+
+app.get('/pacosako/api/meta/:gameId/poll/:afterTime', getMetaHandler);
+app.get('/pacosako/api/meta/:gameId', getMetaHandler);
+
+/* TODO: Add APIs for posting updates. */
+app.use('/pacosako/api/posttest', express.json());
+app.post('/pacosako/api/posttest', async function(req, res, next) {
+  try {
+    res.json(req.body);
+  } catch (err) {
+    internalErrorJson(err, res);
+  }
+});
+
+app.use('/pacosako/api', express.static('public'));
+
+app.use('/gun', Gun.serve(__dirname));
+
+config.server.listen(config.port);

package-lock.json

@@ -1201,6 +1201,11 @@
       "resolved": "https://registry.npmjs.org/array-filter/-/array-filter-0.0.1.tgz",
       "integrity": "sha1-fajPLiZijtcygDWB/SH2fKzS7uw="
     },
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+      "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
+      "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
+    },
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       "resolved": "https://registry.npmjs.org/array-map/-/array-map-0.0.0.tgz",
@@ -1463,6 +1468,52 @@
         "file-uri-to-path": "1.0.0"
       }
     },
+    "body-parser": {
+      "version": "1.19.0",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.19.0.tgz",
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+      "requires": {
+        "bytes": "3.1.0",
+        "content-type": "~1.0.4",
+        "debug": "2.6.9",
+        "depd": "~1.1.2",
+        "http-errors": "1.7.2",
+        "iconv-lite": "0.4.24",
+        "on-finished": "~2.3.0",
+        "qs": "6.7.0",
+        "raw-body": "2.4.0",
+        "type-is": "~1.6.17"
+      },
+      "dependencies": {
+        "bytes": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.0.tgz",
+          "integrity": "sha512-zauLjrfCG+xvoyaqLoV8bLVXXNGC4JqlxFCutSDWA6fJrTo2ZuvLYTqZ7aHBLZSMOopbzwv8f+wZcVzfVTI2Dg=="
+        },
+        "http-errors": {
+          "version": "1.7.2",
+          "resolved": "https://registry.npmjs.org/http-errors/-/http-errors-1.7.2.tgz",
+          "integrity": "sha512-uUQBt3H/cSIVfch6i1EuPNy/YsRSOUBXTVfZ+yR7Zjez3qjBz6i9+i4zjNaoqcoFVI4lQJ5plg63TvGfRSDCRg==",
+          "requires": {
+            "depd": "~1.1.2",
+            "inherits": "2.0.3",
+            "setprototypeof": "1.1.1",
+            "statuses": ">= 1.5.0 < 2",
+            "toidentifier": "1.0.0"
+          }
+        },
+        "inherits": {
+          "version": "2.0.3",
+          "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.3.tgz",
+          "integrity": "sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4="
+        },
+        "qs": {
+          "version": "6.7.0",
+          "resolved": "https://registry.npmjs.org/qs/-/qs-6.7.0.tgz",
+          "integrity": "sha512-VCdBRNFTX1fyE7Nb6FYoURo/SPe62QCaAyzJvUjwRaIsc+NePBEniHlvxFmmX56+HZphIGtV0XeCirBtpDrTyQ=="
+        }
+      }
+    },
     "bplist-creator": {
       "version": "0.0.8",
       "resolved": "https://registry.npmjs.org/bplist-creator/-/bplist-creator-0.0.8.tgz",
@@ -1848,6 +1899,19 @@
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       "integrity": "sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4="
     },
+    "content-disposition": {
+      "version": "0.5.3",
+      "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.3.tgz",
+      "integrity": "sha512-ExO0774ikEObIAEV9kDo50o+79VCUdEB6n6lzKgGwupcVeRlhrj3qGAfwq8G6uBJjkqLrhT0qEYFcWng8z1z0g==",
+      "requires": {
+        "safe-buffer": "5.1.2"
+      }
+    },
+    "content-type": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/content-type/-/content-type-1.0.4.tgz",
+      "integrity": "sha512-hIP3EEPs8tB9AT1L+NUqtwOAps4mk2Zob89MWXMHjHWg9milF/j4osnnQLXBCBFBk/tvIG/tUc9mOUJiPBhPXA=="
+    },
     "convert-source-map": {
       "version": "1.7.0",
       "resolved": "https://registry.npmjs.org/convert-source-map/-/convert-source-map-1.7.0.tgz",
@@ -1856,6 +1920,16 @@
         "safe-buffer": "~5.1.1"
       }
     },
+    "cookie": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.4.0.tgz",
+      "integrity": "sha512-+Hp8fLp57wnUSt0tY0tHEXh4voZRDnoIrZPqlo3DPiI4y9lwg/jqx+1Om94/W6ZaPDOUbnjOt/99w66zk+l1Xg=="
+    },
+    "cookie-signature": {
+      "version": "1.0.6",
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+      "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw="
+    },
     "copy-descriptor": {
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/copy-descriptor/-/copy-descriptor-0.1.1.tgz",
@@ -2247,6 +2321,50 @@
         "base64-js": "^1.3.0"
       }
     },
+    "express": {
+      "version": "4.17.1",
+      "resolved": "https://registry.npmjs.org/express/-/express-4.17.1.tgz",
+      "integrity": "sha512-mHJ9O79RqluphRrcw2X/GTh3k9tVv8YcoyY4Kkh4WDMUYKRZUq0h1o0w2rrrxBqM7VoeUVqgb27xlEMXTnYt4g==",
+      "requires": {
+        "accepts": "~1.3.7",
+        "array-flatten": "1.1.1",
+        "body-parser": "1.19.0",
+        "content-disposition": "0.5.3",
+        "content-type": "~1.0.4",
+        "cookie": "0.4.0",
+        "cookie-signature": "1.0.6",
+        "debug": "2.6.9",
+        "depd": "~1.1.2",
+        "encodeurl": "~1.0.2",
+        "escape-html": "~1.0.3",
+        "etag": "~1.8.1",
+        "finalhandler": "~1.1.2",
+        "fresh": "0.5.2",
+        "merge-descriptors": "1.0.1",
+        "methods": "~1.1.2",
+        "on-finished": "~2.3.0",
+        "parseurl": "~1.3.3",
+        "path-to-regexp": "0.1.7",
+        "proxy-addr": "~2.0.5",
+        "qs": "6.7.0",
+        "range-parser": "~1.2.1",
+        "safe-buffer": "5.1.2",
+        "send": "0.17.1",
+        "serve-static": "1.14.1",
+        "setprototypeof": "1.1.1",
+        "statuses": "~1.5.0",
+        "type-is": "~1.6.18",
+        "utils-merge": "1.0.1",
+        "vary": "~1.1.2"
+      },
+      "dependencies": {
+        "qs": {
+          "version": "6.7.0",
+          "resolved": "https://registry.npmjs.org/qs/-/qs-6.7.0.tgz",
+          "integrity": "sha512-VCdBRNFTX1fyE7Nb6FYoURo/SPe62QCaAyzJvUjwRaIsc+NePBEniHlvxFmmX56+HZphIGtV0XeCirBtpDrTyQ=="
+        }
+      }
+    },
     "extend": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/extend/-/extend-3.0.2.tgz",
@@ -2528,6 +2646,11 @@
         "mime-types": "^2.1.12"
       }
     },
+    "forwarded": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/forwarded/-/forwarded-0.1.2.tgz",
+      "integrity": "sha1-mMI9qxF1ZXuMBXPozszZGw/xjIQ="
+    },
     "fragment-cache": {
       "version": "0.2.1",
       "resolved": "https://registry.npmjs.org/fragment-cache/-/fragment-cache-0.2.1.tgz",
@@ -3402,6 +3525,11 @@
       "resolved": "https://registry.npmjs.org/invert-kv/-/invert-kv-1.0.0.tgz",
       "integrity": "sha1-EEqOSqym09jNFXqO+L+rLXo//bY="
     },
+    "ipaddr.js": {
+      "version": "1.9.1",
+      "resolved": "https://registry.npmjs.org/ipaddr.js/-/ipaddr.js-1.9.1.tgz",
+      "integrity": "sha512-0KI/607xoxSToH7GjN1FfSbLoU0+btTicjsQSWQlh/hZykN8KpmMf7uYwPW3R+akZ6R/w18ZlXSHBYXiYUPO3g=="
+    },
     "is-accessor-descriptor": {
       "version": "0.1.6",
       "resolved": "https://registry.npmjs.org/is-accessor-descriptor/-/is-accessor-descriptor-0.1.6.tgz",
@@ -4078,6 +4206,11 @@
         "object-visit": "^1.0.0"
       }
     },
+    "media-typer": {
+      "version": "0.3.0",
+      "resolved": "https://registry.npmjs.org/media-typer/-/media-typer-0.3.0.tgz",
+      "integrity": "sha1-hxDXrwqmJvj/+hzgAWhUUmMlV0g="
+    },
     "mem": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/mem/-/mem-1.1.0.tgz",
@@ -4086,6 +4219,11 @@
         "mimic-fn": "^1.0.0"
       }
     },
+    "merge-descriptors": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/merge-descriptors/-/merge-descriptors-1.0.1.tgz",
+      "integrity": "sha1-sAqqVW3YtEVoFQ7J0blT8/kMu2E="
+    },
     "merge-stream": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/merge-stream/-/merge-stream-1.0.1.tgz",
@@ -4094,6 +4232,11 @@
         "readable-stream": "^2.0.1"
       }
     },
+    "methods": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/methods/-/methods-1.1.2.tgz",
+      "integrity": "sha1-VSmk1nZUE07cxSZmVoNbD4Ua/O4="
+    },
     "metro": {
       "version": "0.56.4",
       "resolved": "https://registry.npmjs.org/metro/-/metro-0.56.4.tgz",
@@ -5024,6 +5167,11 @@
       "resolved": "https://registry.npmjs.org/path-parse/-/path-parse-1.0.6.tgz",
       "integrity": "sha512-GSmOT2EbHrINBf9SR7CDELwlJ8AENk3Qn7OikK4nFYAu3Ote2+JYNVvkpAEQm3/TLNEJFD/xZJjzyxg3KBWOzw=="
     },
+    "path-to-regexp": {
+      "version": "0.1.7",
+      "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-0.1.7.tgz",
+      "integrity": "sha1-32BBeABfUi8V60SQ5yR6G/qmf4w="
+    },
     "path-type": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/path-type/-/path-type-2.0.0.tgz",
@@ -5199,6 +5347,15 @@
         "react-is": "^16.8.1"
       }
     },
+    "proxy-addr": {
+      "version": "2.0.6",
+      "resolved": "https://registry.npmjs.org/proxy-addr/-/proxy-addr-2.0.6.tgz",
+      "integrity": "sha512-dh/frvCBVmSsDYzw6n926jv974gddhkFPfiN8hPOi30Wax25QZyZEGveluCgliBnqmuM+UJmBErbAUFIoDbjOw==",
+      "requires": {
+        "forwarded": "~0.1.2",
+        "ipaddr.js": "1.9.1"
+      }
+    },
     "pseudomap": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/pseudomap/-/pseudomap-1.0.2.tgz",
@@ -5254,6 +5411,41 @@
       "resolved": "https://registry.npmjs.org/range-parser/-/range-parser-1.2.1.tgz",
       "integrity": "sha512-Hrgsx+orqoygnmhFbKaHE6c296J+HTAQXoxEF6gNupROmmGJRoyzfG3ccAveqCBrwr/2yxQ5BVd/GTl5agOwSg=="
     },
+    "raw-body": {
+      "version": "2.4.0",
+      "resolved": "https://registry.npmjs.org/raw-body/-/raw-body-2.4.0.tgz",
+      "integrity": "sha512-4Oz8DUIwdvoa5qMJelxipzi/iJIi40O5cGV1wNYp5hvZP8ZN0T+jiNkL0QepXs+EsQ9XJ8ipEDoiH70ySUJP3Q==",
+      "requires": {
+        "bytes": "3.1.0",
+        "http-errors": "1.7.2",
+        "iconv-lite": "0.4.24",
+        "unpipe": "1.0.0"
+      },
+      "dependencies": {
+        "bytes": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.0.tgz",
+          "integrity": "sha512-zauLjrfCG+xvoyaqLoV8bLVXXNGC4JqlxFCutSDWA6fJrTo2ZuvLYTqZ7aHBLZSMOopbzwv8f+wZcVzfVTI2Dg=="
+        },
+        "http-errors": {
+          "version": "1.7.2",
+          "resolved": "https://registry.npmjs.org/http-errors/-/http-errors-1.7.2.tgz",
+          "integrity": "sha512-uUQBt3H/cSIVfch6i1EuPNy/YsRSOUBXTVfZ+yR7Zjez3qjBz6i9+i4zjNaoqcoFVI4lQJ5plg63TvGfRSDCRg==",
+          "requires": {
+            "depd": "~1.1.2",
+            "inherits": "2.0.3",
+            "setprototypeof": "1.1.1",
+            "statuses": ">= 1.5.0 < 2",
+            "toidentifier": "1.0.0"
+          }
+        },
+        "inherits": {
+          "version": "2.0.3",
+          "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.3.tgz",
+          "integrity": "sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4="
+        }
+      }
+    },
     "rc": {
       "version": "1.2.8",
       "resolved": "https://registry.npmjs.org/rc/-/rc-1.2.8.tgz",
@@ -6450,6 +6642,15 @@
       "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.7.1.tgz",
       "integrity": "sha512-Ne2YiiGN8bmrmJJEuTWTLJR32nh/JdL1+PSicowtNb0WFpn59GK8/lfD61bVtzguz7b3PBt74nxpv/Pw5po5Rg=="
     },
+    "type-is": {
+      "version": "1.6.18",
+      "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
+      "integrity": "sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==",
+      "requires": {
+        "media-typer": "0.3.0",
+        "mime-types": "~2.1.24"
+      }
+    },
     "typedarray": {
       "version": "0.0.6",
       "resolved": "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz",

package.json

@@ -5,6 +5,7 @@
   "main": "index.js",
   "dependencies": {
     "core-js": "^3.6.4",
+    "express": "^4.17.1",
     "gun": "^0.2020.301",
     "gun-db": "^1.0.571",
     "react": "^16.9.0",

public/poll.html

@@ -0,0 +1,73 @@
+<html>
+	<head>
+		<meta charset="UTF-8">
+		<title>Polling Test</title>
+	</head>
+	<body>
+		<div id="current"></div>
+		<script src="https://code.jquery.com/jquery-3.5.0.min.js"></script>
+		<script>
+			let gameId = '5b687c23df28945e';
+			let currentRequest = null;
+			function startPoll(fromTime) {
+				const thisRequest = currentRequest = $.ajax({
+					dataType: 'json',
+					contentType: 'application/json',
+					//url: `https://jessemcdonald.info/pacosako/api/meta/${gameId}/poll/${fromTime || 0}`,
+					url: `https://jessemcdonald.info/pacosako/api/games/poll/${fromTime || 0}`,
+					cache: false,
+					timeout: 0,
+				}).done((data, textStatus, jqXHR) => {
+					if (currentRequest === thisRequest) {
+						if (jqXHR.status == 204) {
+							startPoll(fromTime);
+						} else {
+							$('<p></p>').text(JSON.stringify(data)).appendTo('#current');
+							startPoll(data.modified);
+						}
+					}
+				}).fail((jqXHR, textStatus, errorThrown) => {
+					if (currentRequest === thisRequest) {
+						$('#current').empty().text(JSON.stringify({ textStatus, errorThrown }));
+						setTimeout(() => {
+							if (currentRequest === thisRequest) {
+								startPoll(0);
+							}
+						}, 3000);
+					}
+				});
+			}
+			function stopPoll() {
+				const request = currentRequest;
+				if (request !== null) {
+					currentRequest = null;
+					request.abort();
+				}
+			}
+			function doPost(data) {
+				stopPoll();
+				$.ajax({
+					dataType: 'json',
+					contentType: 'application/json',
+					url: `https://jessemcdonald.info/pacosako/api/posttest`,
+					method: 'POST',
+					cache: false,
+					data: JSON.stringify(data),
+					timeout: 5000,
+				}).done((responseData, textStatus, jqXHR) => {
+					$('#current').empty().text(JSON.stringify(responseData));
+				}).fail((jqXHR, textStatus, errorThrown) => {
+					$('#current').empty().text(JSON.stringify({ textStatus, errorThrown }));
+				});
+			}
+			$(() => {
+				let counter = 0;
+				$('<button>Start Polling</button>').appendTo('body').on('click', () => startPoll());
+				$('<button>Stop Polling</button>').appendTo('body').on('click', () => stopPoll());
+				$('<button>Do Post</button>').appendTo('body').on('click', () => doPost({ counter: ++counter }));
+			});
+		</script>
+	</body>
+</html>
+<!-- vim:set noexpandtab sw=2 ts=2: -->
+