Initial commit

.gitignore

@@ -0,0 +1,138 @@
+# ---> Node
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+web_modules/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional stylelint cache
+.stylelintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache
+
+# Next.js build output
+.next
+out
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and not Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+.temp
+.cache
+
+# vitepress build output
+**/.vitepress/dist
+
+# vitepress cache directory
+**/.vitepress/cache
+
+# Docusaurus cache and generated files
+.docusaurus
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+.vscode-test
+
+# yarn v2
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*
+

LICENSE

@@ -1,201 +0,0 @@
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README.md

@@ -1,38 +1,2 @@
-# Single-page chat with Tinode
+# im_webapp
 
-Example using [Tinode](https://github.com/tinode/chat/) to build a single-page chat application. The app uses
-[React](https://facebook.github.io/react/), Google's material design [fonts](https://www.google.com/fonts/)
-and [icons](https://google.github.io/material-design-icons/#icon-font-for-the-web). The [Tinode javascript library](https://github.com/tinode/tinode-js/) has no external dependencies. Overall it's a lot like open source WhatsApp or Telegram web apps.
-
-Although the app is generally usable, keep in mind that this is work in progress. Some bugs probably exist. The app was tested in the latest Chrome & Firefox only.
-
-Try possibly newer or older version live at https://api.tinode.co/x/example-react-js/. Login as one of `alice`, `bob`, `carol`, `dave`, `frank`. Password is `<login>123`, e.g. password for `alice` is `alice123`. You can discover other users by email or phone by prefixing them with `email:` or `tel:` respectively. Emails are `<login>@example.com`, e.g. `alice@example.com`, phones are `17025550001` through `17025550009`. The demo is reset every night at 2:15am Pacific time.
-
-License: [Apache 2.0](http://www.apache.org/licenses/LICENSE-2.0)
-
-Sample avatar photos from https://www.pexels.com/ under [CC0 license](https://www.pexels.com/photo-license/).
-
-Background pattern from http://subtlepatterns.com/, commercial and non-commercial use allowed with attribution.
-
-## Missing functionality
-
-* Previews not generated for videos, audio, links or docs.
-* No indication of some chat statuses (muted, blocked, etc.).
-* Browser push notifications are not implemented.
-* No end-to-end encryption.
-* Editing chat permissions is incomplete.
-* Emoji support is weak.
-
-## Responsive design
-
-### Desktop screenshot
-
-<p align="center">
-  <img src="web-desktop-2.png" alt="Desktop web: full app" width=866 />
-</p>
-
-### Mobile screenshots
-
-<p align="center">
-  <kbd><img src="web-mob-contacts-1.png" alt="Mobile web: contacts" width=323 /></kbd> <kbd><img src="web-mob-chat-1.png" alt="Mobile web: chat" width=323 /></kbd> <kbd><img src="web-mob-info-1.png" alt="Mobile web: topic info" width=323 /></kbd> <kbd><img src="web-mob-new-chat-1.png" alt="Mobile web: start new chat" width=323 /></kbd>
-</p>

drafty.js

@@ -1,753 +0,0 @@
-// Basic parser and formatter for very simple text markup. Mostly targeted at
-// mobile use cases similar to Telegram and WhatsApp.
-//
-// Supports:
-//   *abc* -> <b>abc</b>
-//   _abc_ -> <i>abc</i>
-//   ~abc~ -> <del>abc</del>
-//   `abc` -> <tt>abc</tt>
-// Nested frmatting is supported, e.g. *abc _def_* -> <b>abc <i>def</i></b>
-//
-// URLs, @mentions, and #hashtags are extracted and converted into links.
-//
-// JSON data representation is inspired by Draft.js raw formatting.
-
-/*
-Text:
-    this is *bold*, `code` and _italic_, ~strike~
-    combined *bold and _italic_*
-    an url: https://www.example.com/abc#fragment and another _www.tinode.co_
-    this is a @mention and a #hashtag in a string
-    second #hashtag
-
-Sample JSON representation of the text above:
-{
-   "txt": "this is bold, code and italic, strike combined bold and italic an url: https://www.example.com/abc#fragment " +
-           "and another www.tinode.co this is a @mention and a #hashtag in a string second #hashtag",
-   "fmt": [
-       { "at":8, "len":4,"tp":"ST" },{ "at":14, "len":4, "tp":"CO" },{ "at":23, "len":6, "tp":"EM"},
-       { "at":31, "len":6, "tp":"DL" },{ "tp":"BR", "len":1, "at":37 },{ "at":56, "len":6, "tp":"EM" },
-       { "at":47, "len":15, "tp":"ST" },{ "tp":"BR", "len":1, "at":62 },{ "at":120, "len":13, "tp":"EM" },
-       { "at":71, "len":36, "key":0 },{ "at":120, "len":13, "key":1 },{ "tp":"BR", "len":1, "at":133 },
-       { "at":144, "len":8, "key":2 },{ "at":159, "len":8, "key":3 },{ "tp":"BR", "len":1, "at":179 },
-       { "at":187, "len":8, "key":3 },{ "tp":"BR", "len":1, "at":195 }
-   ],
-   "ent": [
-       { "tp":"LN", "data":{ "url":"https://www.example.com/abc#fragment" } },
-       { "tp":"LN", "data":{ "url":"http://www.tinode.co" } },
-       { "tp":"MN", "data":{ "val":"mention" } },
-       { "tp":"HT", "data":{ "val":"hashtag" } }
-   ]
-}
-*/
-
-(function(environment) { // closure for web browsers
-  'use strict';
-
-  // Regular expressions for parsing inline formats. Javascript does not support lookbehind,
-  // so it's a bit messy.
-  var INLINE_STYLES = [
-    // Strong = bold, *bold text*
-    {name: "ST", start: /(?:^|\W)(\*)[^\s*]/, end: /[^\s*](\*)(?=$|\W)/},
-    // Emphesized = italic, _italic text_
-    {name: "EM", start: /(?:^|[\W_])(_)[^\s_]/, end: /[^\s_](_)(?=$|[\W_])/},
-    // Deleted, ~strike this though~
-    {name: "DL", start: /(?:^|\W)(~)[^\s~]/, end: /[^\s~](~)(?=$|\W)/},
-    // Code block `this is monospace`
-    {name: "CO", start: /(?:^|\W)(`)[^`]/, end: /[^`](`)(?=$|\W)/}
-  ];
-
-  // RegExps for entity extraction (RF = reference)
-  var ENTITY_TYPES = [
-    // URLs
-    {name: "LN", dataName: "url",
-      pack: function(val) {
-        // Check if the protocol is specified, if not use http
-        if (!/^[a-z]+:\/\//i.test(val)) {
-          val = 'http://' + val;
-        }
-        return {url: val};
-      },
-      re: /(https?:\/\/)?(?:www\.)?[-a-zA-Z0-9@:%._\+~#=]{2,256}\.[a-z]{2,4}\b(?:[-a-zA-Z0-9@:%_\+.~#?&//=]*)/g},
-    // Mentions @user (must be 2 or more characters)
-    {name: "MN", dataName: "val",
-      pack: function(val) { return {val: val.slice(1)}; },
-      re: /\B@(\w\w+)/g},
-    // Hashtags #hashtag, like metion 2 or more characters.
-    {name: "HT", dataName: "val",
-      pack: function(val) { return {val: val.slice(1)}; },
-      re: /\B#(\w\w+)/g}
-  ];
-
-  // HTML tag name suggestions
-  var HTML_TAGS = {
-    ST: { name: 'b', isVoid: false },
-    EM: { name: 'i', isVoid: false },
-    DL: { name: 'del', isVoid: false },
-    CO: { name: 'tt', isVoid: false },
-    BR: { name: 'br', isVoid: true },
-    LN: { name: 'a', isVoid: false },
-    MN: { name: 'a', isVoid: false },
-    HT: { name: 'a', isVoid: false },
-    IM: { name: 'img', isVoid: true }
-  };
-
-  // Convert base64-encoded string into Blob.
-  function base64toObjectUrl(b64, contentType) {
-    var bin = atob(b64);
-    var length = bin.length;
-    var buf = new ArrayBuffer(length);
-    var arr = new Uint8Array(buf);
-    for (var i = 0; i < length; i++) {
-      arr[i] = bin.charCodeAt(i);
-    }
-
-    return URL.createObjectURL(new Blob([buf], {type: contentType}));
-  }
-
-  // Helpers for converting Drafty to HTML.
-  var DECORATORS = {
-    ST: { open: function() { return '<b>'; }, close: function() { return '</b>'; }},
-    EM: { open: function() { return '<i>'; }, close: function() { return '</i>'}},
-    DL: { open: function() { return '<del>'; }, close: function() { return '</del>'}},
-    CO: { open: function() { return '<tt>'; }, close: function() { return '</tt>'}},
-    BR: { open: function() { return ''; }, close: function() { return '<br/>'}},
-    LN: {
-      open: function(data) { return '<a href="' + data.url + '">'; },
-      close: function(data) { return '</a>'; },
-      props: function(data) { return { href: data.url, target: "_blank" }; },
-    },
-    MN: {
-      open: function(data) { return '<a href="#' + data.val + '">'; },
-      close: function(data) { return '</a>'; },
-      props: function(data) { return { name: data.val }; },
-    },
-    HT: {
-      open: function(data) { return '<a href="#' + data.val + '">'; },
-      close: function(data) { return '</a>'; },
-      props: function(data) { return { name: data.val }; },
-    },
-    IM: {
-      open: function(data) {
-        var blobUrl = base64toObjectUrl(data.val, data.mime);
-        var res = (data.name ? '<a href="' + blobUrl + '" download="' + data.name + '">' : '') +
-          '<img src="' + blobUrl + '"' +
-            (data.width ? ' width="' + data.width + '"' : '') +
-            (data.height ? ' height="' + data.height + '"' : '') + ' border="0" />';
-        console.log("open: " + res);
-        return res;
-      },
-      close: function(data) {
-        return (data.name ? '</a>' : '');
-      },
-      props: function(data) {
-        var url = base64toObjectUrl(data.val, data.mime);
-        return {
-          src: url,
-          title: data.name,
-          'data-width': data.width,
-          'data-height': data.height,
-          'data-name': data.name,
-          'data-size': (data.val.length * 0.75) | 0,
-          'data-mime': data.mime
-        };
-      },
-    }
-  };
-
-  var Drafty = (function() {
-
-    // Take a string and defined earlier style spans, re-compose them into a tree where each leaf is
-    // a same-style (including unstyled) string. I.e. 'hello *bold _italic_* and ~more~ world' ->
-    // ('hello ', (b: 'bold ', (i: 'italic')), ' and ', (s: 'more'), ' world');
-    //
-    // This is needed in order to clear markup, i.e. 'hello *world*' -> 'hello world' and convert
-    // ranges from markup-ed offsets to plain text offsets.
-    function chunkify(line, start, end, spans) {
-      var chunks = [];
-
-      if (spans.length == 0) {
-        return [];
-      }
-
-      for (var i in spans) {
-        // Get the next chunk from the queue
-        var span = spans[i];
-
-        // Grab the initial unstyled chunk
-        if (span.start > start) {
-          chunks.push({text: line.slice(start, span.start)});
-        }
-
-        // Grab the styled chunk. It may include subchunks.
-        var chunk = {type: span.type};
-        var chld = chunkify(line, span.start + 1, span.end - 1, span.children);
-        if (chld.length > 0) {
-          chunk.children = chld;
-        } else {
-          chunk.text = span.text;
-        }
-        chunks.push(chunk);
-        start = span.end + 1; // '+1' is to skip the formatting character
-      }
-
-      // Grab the remaining unstyled chunk, after the last span
-      if (start < end) {
-        chunks.push({text: line.slice(start, end)});
-      }
-
-      return chunks;
-    }
-
-    // Same as chunkify but used for formatting.
-    function forEach(line, start, end, spans, formatter, context) {
-      // Add un-styled range before the styled span starts.
-      // Process ranges calling formatter for each range.
-      var result = [];
-      for (var i = 0; i < spans.length; i++) {
-        var span = spans[i];
-
-        // Add un-styled range before the styled span starts.
-        if (start < span.at) {
-          result.push(formatter.call(context, null, undefined, line.slice(start, span.at)));
-          start = span.at;
-        }
-        // Get all spans which are within current span.
-        var subspans = [];
-        for (var si = i + 1; si < spans.length && spans[si].at < span.at + span.len; si++) {
-          subspans.push(spans[si]);
-          i = si;
-        }
-
-        var tag = HTML_TAGS[span.tp] || {};
-        result.push(formatter.call(context, span.tp, span.data,
-          tag.isVoid ? null : forEach(line, start, span.at + span.len, subspans, formatter, context)));
-
-        start = span.at + span.len;
-      }
-
-      // Add the last unformatted range.
-      if (start < end) {
-        result.push(formatter.call(context, null, undefined, line.slice(start, end)));
-      }
-
-      return result;
-    }
-
-    // Detect starts and ends of formatting spans. Unformatted spans are
-    // ignored at this stage.
-    function spannify(original, re_start, re_end, type) {
-      var result = [];
-      var index = 0;
-      var line = original.slice(0); // make a copy;
-
-      while (line.length > 0) {
-        // match[0]; // match, like '*abc*'
-        // match[1]; // match captured in parenthesis, like 'abc'
-        // match['index']; // offset where the match started.
-
-        // Find the opening token.
-        var start = re_start.exec(line);
-        if (start == null) {
-          break;
-        }
-
-        // Because javascript RegExp does not support lookbehind, the actual offset may not point
-        // at the markup character. Find it in the matched string.
-        var start_offset = start['index'] + start[0].lastIndexOf(start[1]);
-        // Clip the processed part of the string.
-        line = line.slice(start_offset + 1);
-        // start_offset is an offset within the clipped string. Convert to original index.
-        start_offset += index;
-        // Index now point to the beginning of 'line' within the 'original' string.
-        index = start_offset + 1;
-
-        // Find the matching closing token.
-        var end = re_end ? re_end.exec(line) : null;
-        if (end == null) {
-          break;
-        }
-        var end_offset = end['index'] + end[0].indexOf(end[1]);
-        // Clip the processed part of the string.
-        line = line.slice(end_offset + 1);
-        // Update offsets
-        end_offset += index;
-        // Index now point to the beginning of 'line' within the 'original' string.
-        index = end_offset + 1;
-
-        result.push({
-          text: original.slice(start_offset+1, end_offset),
-          children: [],
-          start: start_offset,
-          end: end_offset,
-          type: type
-        });
-      }
-
-      return result;
-    }
-
-    // Convert linear array or spans into a tree representation.
-    // Keep standalone and nested spans, throw away partially overlapping spans.
-    function toTree(spans) {
-      if (spans.length == 0) {
-        return [];
-      }
-
-      var tree = [spans[0]];
-      var last = spans[0];
-      for (var i = 1; i < spans.length; i++) {
-        // Keep spans which start after the end of the previous span or those which
-        // are complete within the previous span.
-
-        if (spans[i].start > last.end) {
-          // Span is completely outside of the previous span.
-          tree.push(spans[i]);
-          last = spans[i];
-        } else if (spans[i].end < last.end) {
-          // Span is fully inside of the previous span. Push to subnode.
-          last.children.push(spans[i]);
-        }
-        // Span could partially overlap, ignoring it as invalid.
-      }
-
-      // Recursively rearrange the subnodes.
-      for (var i in tree) {
-        tree[i].children = toTree(tree[i].children);
-      }
-
-      return tree;
-    }
-
-    // Get a list of entities from a text.
-    function extractEntities(line) {
-      var match;
-      var extracted = [];
-      ENTITY_TYPES.map(function(entity) {
-        while ((match = entity.re.exec(line)) !== null) {
-          extracted.push({
-            offset: match['index'],
-            len: match[0].length,
-            unique: match[0],
-            data: entity.pack(match[0]),
-            type: entity.name});
-        }
-      });
-
-      if (extracted.length == 0) {
-        return extracted;
-      }
-
-      // Remove entities detected inside other entities, like #hashtag in a URL.
-      extracted.sort(function(a,b) {
-        return a.offset - b.offset;
-      });
-
-      var idx = -1;
-      extracted = extracted.filter(function(el) {
-        var result = (el.offset > idx);
-        idx = el.offset + el.len;
-        return result;
-      });
-
-      return extracted;
-    }
-
-    // Convert the chunks into format suitable for serialization.
-    function draftify(chunks, startAt) {
-      var plain = "";
-      var ranges = [];
-      for (var i in chunks) {
-        var chunk = chunks[i];
-        if (!chunk.text) {
-          var drafty = draftify(chunk.children, plain.length + startAt);
-          chunk.text = drafty.txt;
-          ranges = ranges.concat(drafty.fmt);
-        }
-
-        if (chunk.type) {
-          ranges.push({at: plain.length + startAt, len: chunk.text.length, tp: chunk.type});
-        }
-
-        plain += chunk.text;
-      }
-      return {txt: plain, fmt: ranges};
-    }
-
-    // Splice two strings: insert second string into the first one at the given index
-    function splice(src, at, insert) {
-      return src.slice(0, at) + insert + src.slice(at);
-    }
-
-    return {
-
-      /**
-       * Parse plain text into structured representation.
-       */
-      parse: function(content) {
-        // Make sure we are parsing strings only.
-        if (typeof content != "string") {
-          return null;
-        }
-
-        // Split text into lines. It makes further processing easier.
-        var lines = content.split(/\r?\n/);
-
-        // Holds entities referenced from text
-        var entityMap = [];
-        var entityIndex = {};
-
-        // Processing lines one by one, hold intermediate result in blx.
-        var blx = [];
-        lines.map(function(line) {
-          var spans = [];
-          var entities = [];
-
-          // Find formatted spans in the string.
-          // Try to match each style.
-          INLINE_STYLES.map(function(style) {
-            // Each style could be matched multiple times.
-            spans = spans.concat(spannify(line, style.start, style.end, style.name));
-          });
-
-          var block;
-          if (spans.length == 0) {
-            block = {txt: line};
-          } else {
-            // Sort spans by style occurence early -> late
-            spans.sort(function(a,b) {
-              return a.start - b.start;
-            });
-
-            // Convert an array of possibly overlapping spans into a tree
-            spans = toTree(spans);
-
-            // Build a tree representation of the entire string, not
-            // just the formatted parts.
-            var chunks = chunkify(line, 0, line.length, spans);
-
-            var drafty = draftify(chunks, 0);
-
-            block = {txt: drafty.txt, fmt: drafty.fmt};
-          }
-
-          // Extract entities from the cleaned up string.
-          entities = extractEntities(block.txt);
-          if (entities.length > 0) {
-            var ranges = [];
-            for (var i in entities) {
-              // {offset: match['index'], unique: match[0], len: match[0].length, data: ent.packer(), type: ent.name}
-              var entity = entities[i];
-              var index = entityIndex[entity.unique];
-              if (!index) {
-                index = entityMap.length;
-                entityIndex[entity.unique] = index;
-                entityMap.push({tp: entity.type, data: entity.data});
-              }
-              ranges.push({at: entity.offset, len: entity.len, key: index});
-            }
-            block.ent = ranges;
-          }
-
-          blx.push(block);
-        });
-
-        var result = {txt: ""};
-
-        // Merge lines and save line breaks as BR inline formatting.
-        if (blx.length > 0) {
-          result.txt = blx[0].txt;
-          result.fmt = (blx[0].fmt || []).concat(blx[0].ent || []);
-
-          for (var i = 1; i<blx.length; i++) {
-            var block = blx[i];
-            var offset = result.txt.length + 1;
-
-            result.fmt.push({tp: "BR", len: 1, at: offset - 1});
-
-            result.txt += " " + block.txt;
-            if (block.fmt) {
-              result.fmt = result.fmt.concat(block.fmt.map(function(s) {
-                s.at += offset; return s;
-              }));
-            }
-            if (block.ent) {
-              result.fmt = result.fmt.concat(block.ent.map(function(s) {
-                s.at += offset; return s;
-              }));
-            }
-          }
-
-          if (result.fmt.length ==  0) {
-            delete result.fmt;
-          }
-
-          if (entityMap.length > 0) {
-            result.ent = entityMap;
-          }
-        }
-        return result;
-      },
-
-      /**
-       * Add inline image to drafty content
-       *
-       * @param {Drafty} content object to add image to
-       * @param {integer} at index where the object is inserted
-       * @param {string} mime mime-type of the image, e.g. "image/png"
-       * @param {string} bits base64-encoded image content
-       * @param {integer} width width of the image
-       * @param {integer} height height of the image
-       * @param {string} fname file name suggestion for downloading the image.
-       */
-      insertImage: function(content, at, mime, base64bits, width, height, fname) {
-        content = content || {txt: " "};
-        content.ent = content.ent || [];
-        content.fmt = content.fmt || [];
-
-        content.fmt.push({
-          at: at,
-          len: 1,
-          key: content.ent.length
-        });
-        content.ent.push({
-          tp: "IM",
-          data: {
-            mime: mime,
-            val: base64bits,
-            width: width,
-            height: height,
-            name: fname
-          }
-        });
-
-        return content;
-      },
-
-      attachFile: function(content, mime, base64bits, fname) {
-        content = content || {txt: ""};
-        content.ent = content.ent || [];
-        content.fmt = content.fmt || [];
-
-        content.fmt.push({
-          at: -1,
-          len: 0,
-          key: content.ent.length
-        });
-
-        content.ent.push({
-          tp: "EX",
-          data: {
-            mime: mime,
-            val: base64bits,
-            name: fname
-          }
-        });
-
-        return content;
-      },
-
-      /**
-       * Given the structured representation of rich text, convert it to HTML.
-       * No attempt is made to strip pre-existing html markup.
-       * This is potentially unsafe because block.txt may contain malicious
-       * markup.
-       *
-       * @param {drafy} content - structured representation of rich text.
-       *
-       * @return HTML-representation of content
-       */
-      unsafeToHTML: function(content) {
-        var {txt, fmt, ent} = content;
-
-        var markup = [];
-        if (fmt) {
-          for (var i in fmt) {
-            var range = fmt[i];
-            var tp = range.tp, data;
-            if (!tp) {
-              var entity = ent[range.key];
-              if (entity) {
-                tp = entity.tp;
-                data = entity.data;
-              }
-            }
-
-            if (DECORATORS[tp]) {
-              // Because we later sort in descending order, closing markup must come first.
-              // Otherwise zero-length objects will not be represented correctly.
-              markup.push({idx: range.at + range.len, what: DECORATORS[tp].close(data)});
-              markup.push({idx: range.at, what: DECORATORS[tp].open(data)});
-            }
-          }
-        }
-
-        markup.sort(function(a, b) {
-          return b.idx - a.idx; // in descending order
-        });
-
-        for (var i in markup) {
-          if (markup[i].what) {
-            txt = splice(txt, markup[i].idx, markup[i].what);
-          }
-        }
-
-        return txt;
-      },
-
-      /**
-       * Transform using custom formatting.
-       *
-       * @param {Drafty} content - content to transform.
-       * @param {function} formatter - callback which transforms individual elements
-       * @param {Object} context - context provided to formatter as 'this'.
-       *
-       * @return {Object} context
-       */
-      format: function(content, formatter, context) {
-        var {txt, fmt, ent} = content;
-
-        txt = txt || "";
-
-        if (!fmt) {
-          return [txt];
-        }
-
-        var spans = [].concat(fmt);
-
-        // Zero values may have been stripped. Restore them.
-        spans.map(function(s) {
-          s.at = s.at || 0;
-          s.len = s.len || 0;
-        });
-
-        // Soft spans first by start index (asc) then by length (desc).
-        spans.sort(function(a, b) {
-          if (a.at - b.at == 0) {
-            return b.len - a.len; // longer one comes first (<0)
-          }
-          return a.at - b.at;
-        });
-
-        // Denormalize entities into spans. Create a copy of the objects to leave
-        // original Drafty object unchanged.
-        spans = spans.map(function(s) {
-          var data;
-          var tp = s.tp;
-          if (!tp) {
-            s.key = s.key || 0;
-            data = ent[s.key].data;
-            tp = ent[s.key].tp;
-          }
-          return {tp: tp, data: data, at: s.at, len: s.len};
-        });
-
-        return forEach(txt, 0, txt.length, spans, formatter, context);
-      },
-
-      /**
-       * Given structured representation of rich text, convert it to plain text.
-       *
-       * @param {drafty} content - content to convert to plain text.
-       */
-      toPlainText: function(content) {
-        return content.text;
-      },
-
-      /**
-       * Returns true if content has no markup and no entities.
-       *
-       * @param {Drafty} content - content to check for presence of markup.
-       * @returns true is content is plain text, false otherwise.
-       */
-      isPlainText: function(content, noLineBreaks) {
-        return !(content.fmt || content.ent);
-      },
-
-      /**
-       * Check if the drafty content has attachments.
-       *
-       * @param {Drafty} content - content to check for attachments.
-       * @returns true if there are attachments.
-       */
-      hasAttachment: function(content) {
-        if (content.ent && content.ent.length > 0) {
-          for (var i in content.ent) {
-            if (content.ent[i].tp == "EX") {
-              return true;
-            }
-          }
-        }
-        return false;
-      },
-
-      /**
-       * Enumerate attachments
-       *
-       * @param {Drafty} content - drafty object to process for attachments.
-       * @param {function} callback - callback to call for each attachment.
-       * @param {Object} content - value of "this" for callback.
-       */
-      attachments: function(content, callback, context) {
-        if (content.ent && content.ent.length > 0) {
-          for (var i in content.ent) {
-            if (content.ent[i].tp == "EX") {
-              callback.call(context, content.ent[i].data, i);
-            }
-          }
-        }
-      },
-
-      // Get blob URL for a given entity
-      getBlobUrl: function(entity) {
-        return base64toObjectUrl(entity.val, entity.mime);
-      },
-
-      getAttachmentSize: function(entity) {
-        // Value is base64 encoded. The actual object size is smaller than the encoded length.
-        return entity.val ? (entity.val.length * 0.75) | 0 : 0;
-      },
-
-      getAttachmentType: function(entity) {
-        return entity.mime || "text/plain";
-      },
-      /**
-       * Get HTML tag for a given two-letter style name
-       * @param {string} style - two-letter style, like ST or LN
-       * @returns
-       */
-      tagName: function(style) {
-        return HTML_TAGS[style] ? HTML_TAGS[style].name : undefined;
-      },
-
-      /**
-       * For a given data bundle generate an object with HTML attributes,
-       * for instance, given {url: "http://www.example.com/"} return
-       * {href: "http://www.example.com/"}
-       * @param {string} style - tw-letter style to generate attributes for.
-       * @param {Object} data - data bundle to convert to attributes
-       * @returns object with HTML attributes.
-       */
-      attrValue: function(style, data) {
-        if (data && DECORATORS[style]) {
-          return DECORATORS[style].props(data);
-        }
-
-        return undefined;
-      },
-
-      /**
-       * Content MIME type.
-       * @returns string suitabe for HTTP Content-Type field.
-       */
-      getContentType: function() {
-        return "text/x-drafty";
-      }
-    };
-  });
-
-  // Export for the window object or node; Check that is not already defined.
-  if (typeof(environment.Drafty) === 'undefined') {
-    environment.Drafty = Drafty();
-  }
-})(this); // 'this' will be a window object for the browsers.

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manifest.json

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-{
-  "short_name": "Tinode chat",
-  "name": "Tinode chat",
-  "icons": [
-    {
-      "src":"img/logo96.png",
-      "sizes": "96x96",
-      "type": "image/png"
-    },
-    {
-      "src":"img/logo192.png",
-      "sizes": "192x192",
-      "type": "image/png"
-    },
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-      "src": "img/logo.svg",
-      "type": "image/svg+xml",
-      "sizes": "512x512"
-    }
-  ],
-  "start_url": "/x/example-react-js/",
-  "background_color": "silver",
-  "theme_color": "#3949AB",
-  "display": "standalone"
-}