🎉 Add uuid v1 implementation.

frontend/src/uxbox/util/rng_impl.js

@@ -10,61 +10,43 @@
 
 goog.provide("uxbox.util.rng_impl");
 goog.require("cljs.core");
+goog.require("goog.object");
 
 goog.scope(function() {
   const self = uxbox.util.rng_impl;
-  const global = goog.global;
+  const platform = cljs.core._STAR_target_STAR_;
 
-  // Check if nodejs rng is available (high quality);
-  if (cljs.core._STAR_target_STAR_ === "nodejs") {
+  if (platform === "nodejs") {
     const crypto = require("crypto");
 
-    self.fill = function(buf) {
-      crypto.randomFillSync(buf);
-      return buf;
-    };
-
     self.getBytes = function(n) {
       return crypto.randomBytes(n);
     };
-  }
 
-  // Check if whatwg rng is available (high quality);
-  else if (global.crypto !== undefined &&
-           global.crypto.getRandomValues !== undefined) {
+  } else {
+    const gobj = goog.object;
+    const global = goog.global;
+    const crypto = gobj.get(global, "crypto");
 
-    self.fill = function(buf) {
-      global.crypto.getRandomValues(buf);
-      return buf;
-    };
+    if (crypto === undefined) {
+      console.warn("No high quality RNG available, switching back to Math.random.", platform);
 
-    self.getBytes = function(n) {
-      const buf = new Uint8Array(16);
-      global.crypto.getRandomValues(buf);
-      return buf;
-    };
-  }
+      self.getBytes = function(n) {
+        const buf = new Uint8Array(n);
 
-  // Switch Back to the Math.random (low quality);
-  else {
-    console.warn("No high quality RNG available, switching back to Math.random.");
+        for (let i = 0, r; i < n; i++) {
+          if ((i & 0x03) === 0) { r = Math.random() * 0x100000000; }
+          buf[i] = r >>> ((i & 0x03) << 3) & 0xff;
+        }
 
-    self.fill = function(buf) {
-      for (let i = 0, r; i < buf.length; i++) {
-        if ((i & 0x03) === 0) { r = Math.random() * 0x100000000; }
-        buf[i] = r >>> ((i & 0x03) << 3) & 0xff;
-      }
-
-      return buf;
-    };
-
-    self.getBytes = function(n) {
-      const buf = new Array(n);
-      for (let i = 0, r; i < n; i++) {
-        if ((i & 0x03) === 0) { r = Math.random() * 0x100000000; }
-        buf[i] = r >>> ((i & 0x03) << 3) & 0xff;
-      }
-      return buf;
-    };
+        return buf;
+      };
+    } else {
+      self.getBytes = function(n) {
+        const buf = new Uint8Array(n);
+        crypto.getRandomValues(buf);
+        return buf;
+      };
+    }
   }
 });

frontend/src/uxbox/util/uuid.cljs

@@ -2,7 +2,10 @@
 ;; License, v. 2.0. If a copy of the MPL was not distributed with this
 ;; file, You can obtain one at http://mozilla.org/MPL/2.0/.
 ;;
-;; Copyright (c) 2016 Andrey Antukh <niwi@niwi.nz>
+;; This Source Code Form is "Incompatible With Secondary Licenses", as
+;; defined by the Mozilla Public License, v. 2.0.
+;;
+;; Copyright (c) 2016-2020 Andrey Antukh <niwi@niwi.nz>
 
 (ns uxbox.util.uuid
   "Provides a UUID v4 uuid generation.
@@ -13,7 +16,7 @@
 
   If no high qualiry RNG, switches to the default Math based
   RNG with proper waring in the console."
-  (:refer-clojure :exclude [zero?])
+  (:refer-clojure :exclude [zero? next])
   (:require [uxbox.util.uuid-impl :as impl]))
 
 (def zero #uuid "00000000-0000-0000-0000-000000000000")
@@ -22,6 +25,11 @@
   [v]
   (= zero v))
 
+(defn next
+  "Generate a v1 (time-based) UUID."
+  []
+  (uuid (impl/v1)))
+
 (defn random
   "Generate a v4 (random) UUID."
   []

frontend/src/uxbox/util/uuid_impl.js

@@ -3,8 +3,34 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  *
- * Copyright (c) 2016 Andrey Antukh <niwi@niwi.nz>
-*/
+ * This Source Code Form is "Incompatible With Secondary Licenses", as
+ * defined by the Mozilla Public License, v. 2.0.
+ *
+ * Copyright (c) 2016-2020 Andrey Antukh <niwi@niwi.nz>
+ */
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2010-2016 Robert Kieffer and other contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
 "use strict";
 
 goog.provide("uxbox.util.uuid_impl");
@@ -45,4 +71,91 @@ goog.scope(function() {
     buf[8] = (buf[8] & 0x3f) | 0x80;
     return toHexString(buf);
   };
-})
+
+  let initialized = false;
+  let node;
+  let clockseq;
+  let lastms = 0;
+  let lastns = 0;
+
+  self.v1 = function() {
+    let cs = clockseq;
+
+    if (!initialized) {
+      const seed = rng.getBytes(8);
+
+      // Per 4.5, create and 48-bit node id, (47 random bits + multicast bit = 1)
+      node = [
+        seed[0] | 0x01,
+        seed[1],
+        seed[2],
+        seed[3],
+        seed[4],
+        seed[5]
+      ];
+
+      // Per 4.2.2, randomize (14 bit) clockseq
+      cs = clockseq = (seed[6] << 8 | seed[7]) & 0x3fff;
+      initialized = true;
+    }
+
+    let ms = Date.now();
+    let ns = lastns + 1;
+    let dt = (ms - lastms) + (ns - lastns) / 10000;
+
+    // Per 4.2.1.2, Bump clockseq on clock regression
+    if (dt < 0) {
+      cs = cs + 1 & 0x3fff;
+    }
+
+    // Reset nsecs if clock regresses (new clockseq) or we've moved onto a new
+    // time interval
+    if (dt < 0 || ms > lastms) {
+      ns = 0;
+    }
+
+    // Per 4.2.1.2 Throw error if too many uuids are requested
+    if (ns >= 10000) {
+      throw new Error("uuid v1 can't create more than 10M uuids/s")
+    }
+
+    lastms = ms;
+    lastns = ns;
+    clockseq = cs;
+
+    // Per 4.1.4 - Convert from unix epoch to Gregorian epoch
+    ms += 12219292800000;
+
+    let i = 0;
+    let buf = new Uint8Array(16);
+
+    // `time_low`
+    var tl = ((ms & 0xfffffff) * 10000 + ns) % 0x100000000;
+    buf[i++] = tl >>> 24 & 0xff;
+    buf[i++] = tl >>> 16 & 0xff;
+    buf[i++] = tl >>> 8 & 0xff;
+    buf[i++] = tl & 0xff;
+
+    // `time_mid`
+    var tmh = (ms / 0x100000000 * 10000) & 0xfffffff;
+    buf[i++] = tmh >>> 8 & 0xff;
+    buf[i++] = tmh & 0xff;
+
+    // `time_high_and_version`
+    buf[i++] = tmh >>> 24 & 0xf | 0x10; // include version
+    buf[i++] = tmh >>> 16 & 0xff;
+
+    // `clock_seq_hi_and_reserved` (Per 4.2.2 - include variant)
+    buf[i++] = cs >>> 8 | 0x80;
+
+    // `clock_seq_low`
+    buf[i++] = cs & 0xff;
+
+    // `node`
+    for (var n = 0; n < 6; ++n) {
+      buf[i + n] = node[n];
+    }
+
+    return toHexString(buf);
+  }
+});

frontend/vendor/main.externs.js

@@ -49,5 +49,8 @@ var TopLevel = {
   "result": function() {},
   "readAsText": function() {},
   "src": function() {},
-  "readAsDataURL": function() {}
+  "readAsDataURL": function() {},
+  "crypto": {
+    "getRandomValues": function() {}
+  }
 };