Seed in place, don't copy to /tmp

Fixes https://github.com/feross/webtorrent-desktop/issues/254

renderer/views/app.js

@@ -9,7 +9,8 @@ var Player = require('./player')
 var TorrentList = require('./torrent-list')
 var Modals = {
   'open-torrent-address-modal': require('./open-torrent-address-modal'),
-  'update-available-modal': require('./update-available-modal')
+  'update-available-modal': require('./update-available-modal'),
+  'create-torrent-modal': require('./create-torrent-modal')
 }
 
 function App (state, dispatch) {
@@ -67,7 +68,7 @@ function App (state, dispatch) {
       return hx`
         <div class='modal'>
           <div class='modal-background'></div>
-          <div class='modal-content add-file-modal'>
+          <div class='modal-content'>
             ${contents}
           </div>
         </div>

renderer/views/create-torrent-modal.js

@@ -0,0 +1,76 @@
+module.exports = UpdateAvailableModal
+
+var h = require('virtual-dom/h')
+var hyperx = require('hyperx')
+var hx = hyperx(h)
+
+var path = require('path')
+
+var {dispatch} = require('../lib/dispatcher')
+
+function UpdateAvailableModal (state) {
+  // First, extract the base folder that the files are all in
+  var files = state.modal.files
+  var pathPrefix = files.map((x) => x.path).reduce(findCommonPrefix)
+  if (files.length > 0 && !pathPrefix.endsWith('/') && !pathPrefix.endsWith('\\')) {
+    pathPrefix = path.dirname(pathPrefix)
+  }
+
+  // Then, use the name of the base folder (or sole file, for a single file torrent)
+  // as the default name. Show all files relative to the base folder.
+  var defaultName = path.basename(pathPrefix)
+  var basePath = path.dirname(pathPrefix)
+  var fileElems = files.map(function (file) {
+    var relativePath = files.length === 0 ? file.name : path.relative(pathPrefix, file.path)
+    return hx`<div>${relativePath}</div>`
+  })
+
+  return hx`
+    <div class='create-torrent-modal'>
+      <p><strong>Create New Torrent</strong></p>
+      <p class='torrent-attribute'>
+        <label>Name:</label>
+        <div class='torrent-attribute'>${defaultName}</div>
+      </p>
+      <p class='torrent-attribute'>
+        <label>Path:</label>
+        <div class='torrent-attribute'>${pathPrefix}</div>
+      </p>
+      <p class='torrent-attribute'>
+        <label>Files:</label>
+        <div>${fileElems}</div>
+      </p>
+      <p>
+        <button class='primary' onclick=${handleOK}>Create Torrent</button>
+        <button class='cancel' onclick=${handleCancel}>Cancel</button>
+      </p>
+    </div>
+  `
+
+  function handleOK () {
+    var options = {
+      // TODO: we can't let the user choose their own name if we want WebTorrent
+      // to use the files in place rather than creating a new folder.
+      // name: document.querySelector('.torrent-name').value
+      name: defaultName,
+      path: basePath,
+      files: files
+    }
+    dispatch('createTorrent', options)
+    dispatch('exitModal')
+  }
+
+  function handleCancel () {
+    dispatch('exitModal')
+  }
+}
+
+// Finds the longest common prefix
+function findCommonPrefix (a, b) {
+  for (var i = 0; i < a.length && i < b.length; i++) {
+    if (a.charCodeAt(i) !== b.charCodeAt(i)) break
+  }
+  if (i === a.length) return a
+  if (i === b.length) return b
+  return a.substring(0, i)
+}