Phoenix app to upload and download files

.formatter.exs

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+[
+  import_deps: [:ecto, :phoenix],
+  inputs: ["*.{ex,exs}", "priv/*/seeds.exs", "{config,lib,test}/**/*.{ex,exs}"],
+  subdirectories: ["priv/*/migrations"]
+]

.gitignore

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+# The directory Mix will write compiled artifacts to.
+/_build/
+
+# If you run "mix test --cover", coverage assets end up here.
+/cover/
+
+# The directory Mix downloads your dependencies sources to.
+/deps/
+
+# Where 3rd-party dependencies like ExDoc output generated docs.
+/doc/
+
+# Ignore .fetch files in case you like to edit your project deps locally.
+/.fetch
+
+# If the VM crashes, it generates a dump, let's ignore it too.
+erl_crash.dump
+
+# Also ignore archive artifacts (built via "mix archive.build").
+*.ez
+
+# Ignore package tarball (built via "mix hex.build").
+poetic-*.tar
+
+# If NPM crashes, it generates a log, let's ignore it too.
+npm-debug.log
+
+# The directory NPM downloads your dependencies sources to.
+/assets/node_modules/
+
+# Since we are building assets from assets/,
+# we ignore priv/static. You may want to comment
+# this depending on your deployment strategy.
+/priv/static/
+
+# Files matching config/*.secret.exs pattern contain sensitive
+# data and you should not commit them into version control.
+#
+# Alternatively, you may comment the line below and commit the
+# secrets files as long as you replace their contents by environment
+# variables.
+/config/*.secret.exs

README.md

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+# Poetic
+
+To start your Phoenix server:
+
+  * Install dependencies with `mix deps.get`
+  * Create and migrate your database with `mix ecto.setup`
+  * Install Node.js dependencies with `cd assets && npm install`
+  * Start Phoenix endpoint with `mix phx.server`
+
+Now you can visit [`localhost:4000`](http://localhost:4000) from your browser.
+
+Ready to run in production? Please [check our deployment guides](https://hexdocs.pm/phoenix/deployment.html).
+
+## Learn more
+
+  * Official website: http://www.phoenixframework.org/
+  * Guides: https://hexdocs.pm/phoenix/overview.html
+  * Docs: https://hexdocs.pm/phoenix
+  * Mailing list: http://groups.google.com/group/phoenix-talk
+  * Source: https://github.com/phoenixframework/phoenix

assets/.babelrc

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+{
+    "presets": [
+        "@babel/preset-env"
+    ]
+}

assets/css/app.css

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+/* This file is for your main application css. */
+
+@import "./phoenix.css";

assets/css/phoenix.css

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+/* Includes some default style for the starter application.
+ * This can be safely deleted to start fresh.
+ */
+
+/* Milligram v1.3.0 https://milligram.github.io
+ * Copyright (c) 2017 CJ Patoilo Licensed under the MIT license
+ */
+
+*,*:after,*:before{box-sizing:inherit}html{box-sizing:border-box;font-size:62.5%}body{color:#000000;font-family:'Helvetica', 'Arial', sans-serif;font-size:1.6em;font-weight:300;line-height:1.6}blockquote{border-left:0.3rem solid #d1d1d1;margin-left:0;margin-right:0;padding:1rem 1.5rem}blockquote *:last-child{margin-bottom:0}.button,button,input[type='button'],input[type='reset'],input[type='submit']{background-color:#0069d9;border:0.1rem solid #0069d9;border-radius:.4rem;color:#fff;cursor:pointer;display:inline-block;font-size:1.1rem;font-weight:700;height:3.8rem;letter-spacing:.1rem;line-height:3.8rem;padding:0 3.0rem;text-align:center;text-decoration:none;text-transform:uppercase;white-space:nowrap}.button:focus,.button:hover,button:focus,button:hover,input[type='button']:focus,input[type='button']:hover,input[type='reset']:focus,input[type='reset']:hover,input[type='submit']:focus,input[type='submit']:hover{background-color:#606c76;border-color:#606c76;color:#fff;outline:0}.button[disabled],button[disabled],input[type='button'][disabled],input[type='reset'][disabled],input[type='submit'][disabled]{cursor:default;opacity:.5}.button[disabled]:focus,.button[disabled]:hover,button[disabled]:focus,button[disabled]:hover,input[type='button'][disabled]:focus,input[type='button'][disabled]:hover,input[type='reset'][disabled]:focus,input[type='reset'][disabled]:hover,input[type='submit'][disabled]:focus,input[type='submit'][disabled]:hover{background-color:#0069d9;border-color:#0069d9}.button.button-outline,button.button-outline,input[type='button'].button-outline,input[type='reset'].button-outline,input[type='submit'].button-outline{background-color:transparent;color:#0069d9}.button.button-outline:focus,.button.button-outline:hover,button.button-outline:focus,button.button-outline:hover,input[type='button'].button-outline:focus,input[type='button'].button-outline:hover,input[type='reset'].button-outline:focus,input[type='reset'].button-outline:hover,input[type='submit'].button-outline:focus,input[type='submit'].button-outline:hover{background-color:transparent;border-color:#606c76;color:#606c76}.button.button-outline[disabled]:focus,.button.button-outline[disabled]:hover,button.button-outline[disabled]:focus,button.button-outline[disabled]:hover,input[type='button'].button-outline[disabled]:focus,input[type='button'].button-outline[disabled]:hover,input[type='reset'].button-outline[disabled]:focus,input[type='reset'].button-outline[disabled]:hover,input[type='submit'].button-outline[disabled]:focus,input[type='submit'].button-outline[disabled]:hover{border-color:inherit;color:#0069d9}.button.button-clear,button.button-clear,input[type='button'].button-clear,input[type='reset'].button-clear,input[type='submit'].button-clear{background-color:transparent;border-color:transparent;color:#0069d9}.button.button-clear:focus,.button.button-clear:hover,button.button-clear:focus,button.button-clear:hover,input[type='button'].button-clear:focus,input[type='button'].button-clear:hover,input[type='reset'].button-clear:focus,input[type='reset'].button-clear:hover,input[type='submit'].button-clear:focus,input[type='submit'].button-clear:hover{background-color:transparent;border-color:transparent;color:#606c76}.button.button-clear[disabled]:focus,.button.button-clear[disabled]:hover,button.button-clear[disabled]:focus,button.button-clear[disabled]:hover,input[type='button'].button-clear[disabled]:focus,input[type='button'].button-clear[disabled]:hover,input[type='reset'].button-clear[disabled]:focus,input[type='reset'].button-clear[disabled]:hover,input[type='submit'].button-clear[disabled]:focus,input[type='submit'].button-clear[disabled]:hover{color:#0069d9}code{background:#f4f5f6;border-radius:.4rem;font-size:86%;margin:0 .2rem;padding:.2rem .5rem;white-space:nowrap}pre{background:#f4f5f6;border-left:0.3rem solid #0069d9;overflow-y:hidden}pre>code{border-radius:0;display:block;padding:1rem 1.5rem;white-space:pre}hr{border:0;border-top:0.1rem solid #f4f5f6;margin:3.0rem 0}input[type='email'],input[type='number'],input[type='password'],input[type='search'],input[type='tel'],input[type='text'],input[type='url'],textarea,select{-webkit-appearance:none;-moz-appearance:none;appearance:none;background-color:transparent;border:0.1rem solid #d1d1d1;border-radius:.4rem;box-shadow:none;box-sizing:inherit;height:3.8rem;padding:.6rem 1.0rem;width:100%}input[type='email']:focus,input[type='number']:focus,input[type='password']:focus,input[type='search']:focus,input[type='tel']:focus,input[type='text']:focus,input[type='url']:focus,textarea:focus,select:focus{border-color:#0069d9;outline:0}select{background:url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" height="14" viewBox="0 0 29 14" width="29"><path fill="#d1d1d1" d="M9.37727 3.625l5.08154 6.93523L19.54036 3.625"/></svg>') center right no-repeat;padding-right:3.0rem}select:focus{background-image:url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" height="14" viewBox="0 0 29 14" width="29"><path fill="#0069d9" d="M9.37727 3.625l5.08154 6.93523L19.54036 3.625"/></svg>')}textarea{min-height:6.5rem}label,legend{display:block;font-size:1.6rem;font-weight:700;margin-bottom:.5rem}fieldset{border-width:0;padding:0}input[type='checkbox'],input[type='radio']{display:inline}.label-inline{display:inline-block;font-weight:normal;margin-left:.5rem}.row{display:flex;flex-direction:column;padding:0;width:100%}.row.row-no-padding{padding:0}.row.row-no-padding>.column{padding:0}.row.row-wrap{flex-wrap:wrap}.row.row-top{align-items:flex-start}.row.row-bottom{align-items:flex-end}.row.row-center{align-items:center}.row.row-stretch{align-items:stretch}.row.row-baseline{align-items:baseline}.row .column{display:block;flex:1 1 auto;margin-left:0;max-width:100%;width:100%}.row .column.column-offset-10{margin-left:10%}.row .column.column-offset-20{margin-left:20%}.row .column.column-offset-25{margin-left:25%}.row .column.column-offset-33,.row .column.column-offset-34{margin-left:33.3333%}.row .column.column-offset-50{margin-left:50%}.row .column.column-offset-66,.row .column.column-offset-67{margin-left:66.6666%}.row .column.column-offset-75{margin-left:75%}.row .column.column-offset-80{margin-left:80%}.row .column.column-offset-90{margin-left:90%}.row .column.column-10{flex:0 0 10%;max-width:10%}.row .column.column-20{flex:0 0 20%;max-width:20%}.row .column.column-25{flex:0 0 25%;max-width:25%}.row .column.column-33,.row .column.column-34{flex:0 0 33.3333%;max-width:33.3333%}.row .column.column-40{flex:0 0 40%;max-width:40%}.row .column.column-50{flex:0 0 50%;max-width:50%}.row .column.column-60{flex:0 0 60%;max-width:60%}.row .column.column-66,.row .column.column-67{flex:0 0 66.6666%;max-width:66.6666%}.row .column.column-75{flex:0 0 75%;max-width:75%}.row .column.column-80{flex:0 0 80%;max-width:80%}.row .column.column-90{flex:0 0 90%;max-width:90%}.row .column .column-top{align-self:flex-start}.row .column .column-bottom{align-self:flex-end}.row .column .column-center{-ms-grid-row-align:center;align-self:center}@media (min-width: 40rem){.row{flex-direction:row;margin-left:-1.0rem;width:calc(100% + 2.0rem)}.row .column{margin-bottom:inherit;padding:0 1.0rem}}a{color:#0069d9;text-decoration:none}a:focus,a:hover{color:#606c76}dl,ol,ul{list-style:none;margin-top:0;padding-left:0}dl dl,dl ol,dl ul,ol dl,ol ol,ol ul,ul dl,ul ol,ul ul{font-size:90%;margin:1.5rem 0 1.5rem 3.0rem}ol{list-style:decimal inside}ul{list-style:circle inside}.button,button,dd,dt,li{margin-bottom:1.0rem}fieldset,input,select,textarea{margin-bottom:1.5rem}blockquote,dl,figure,form,ol,p,pre,table,ul{margin-bottom:2.5rem}table{border-spacing:0;width:100%}td,th{border-bottom:0.1rem solid #e1e1e1;padding:1.2rem 1.5rem;text-align:left}td:first-child,th:first-child{padding-left:0}td:last-child,th:last-child{padding-right:0}b,strong{font-weight:bold}p{margin-top:0}h1,h2,h3,h4,h5,h6{font-weight:300;letter-spacing:-.1rem;margin-bottom:2.0rem;margin-top:0}h1{font-size:4.6rem;line-height:1.2}h2{font-size:3.6rem;line-height:1.25}h3{font-size:2.8rem;line-height:1.3}h4{font-size:2.2rem;letter-spacing:-.08rem;line-height:1.35}h5{font-size:1.8rem;letter-spacing:-.05rem;line-height:1.5}h6{font-size:1.6rem;letter-spacing:0;line-height:1.4}img{max-width:100%}.clearfix:after{clear:both;content:' ';display:table}.float-left{float:left}.float-right{float:right}
+
+/* General style */
+h1{font-size: 3.6rem; line-height: 1.25}
+h2{font-size: 2.8rem; line-height: 1.3}
+h3{font-size: 2.2rem; letter-spacing: -.08rem; line-height: 1.35}
+h4{font-size: 1.8rem; letter-spacing: -.05rem; line-height: 1.5}
+h5{font-size: 1.6rem; letter-spacing: 0; line-height: 1.4}
+h6{font-size: 1.4rem; letter-spacing: 0; line-height: 1.2}
+
+.container{
+  margin: 0 auto;
+  max-width: 80.0rem;
+  padding: 0 2.0rem;
+  position: relative;
+  width: 100%
+}
+select {
+  width: auto;
+}
+
+/* Alerts and form errors */
+.alert {
+  padding: 15px;
+  margin-bottom: 20px;
+  border: 1px solid transparent;
+  border-radius: 4px;
+}
+.alert-info {
+  color: #31708f;
+  background-color: #d9edf7;
+  border-color: #bce8f1;
+}
+.alert-warning {
+  color: #8a6d3b;
+  background-color: #fcf8e3;
+  border-color: #faebcc;
+}
+.alert-danger {
+  color: #a94442;
+  background-color: #f2dede;
+  border-color: #ebccd1;
+}
+.alert p {
+  margin-bottom: 0;
+}
+.alert:empty {
+  display: none;
+}
+.help-block {
+  color: #a94442;
+  display: block;
+  margin: -1rem 0 2rem;
+}
+
+/* Phoenix promo and logo */
+.phx-hero {
+  text-align: center;
+  border-bottom: 1px solid #e3e3e3;
+  background: #eee;
+  border-radius: 6px;
+  padding: 3em;
+  margin-bottom: 3rem;
+  font-weight: 200;
+  font-size: 120%;
+}
+.phx-hero p {
+  margin: 0;
+}
+.phx-logo {
+  min-width: 300px;
+  margin: 1rem;
+  display: block;
+}
+.phx-logo img {
+  width: auto;
+  display: block;
+}
+
+/* Headers */
+header {
+  width: 100%;
+  background: #fdfdfd;
+  border-bottom: 1px solid #eaeaea;
+  margin-bottom: 2rem;
+}
+header section {
+  align-items: center;
+  display: flex;
+  flex-direction: column;
+  justify-content: space-between;
+}
+header section :first-child {
+  order: 2;
+}
+header section :last-child {
+  order: 1;
+}
+header nav ul,
+header nav li {
+  margin: 0;
+  padding: 0;
+  display: block;
+  text-align: right;
+  white-space: nowrap;
+}
+header nav ul {
+  margin: 1rem;
+  margin-top: 0;
+}
+header nav a {
+  display: block;
+}
+
+@media (min-width: 40.0rem) { /* Small devices (landscape phones, 576px and up) */
+  header section {
+    flex-direction: row;
+  }
+  header nav ul {
+    margin: 1rem;
+  }
+  .phx-logo {
+    flex-basis: 527px;
+    margin: 2rem 1rem;
+  }
+}

assets/js/app.js

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+// We need to import the CSS so that webpack will load it.
+// The MiniCssExtractPlugin is used to separate it out into
+// its own CSS file.
+import css from "../css/app.css"
+
+// webpack automatically bundles all modules in your
+// entry points. Those entry points can be configured
+// in "webpack.config.js".
+//
+// Import dependencies
+//
+import "phoenix_html"
+
+// Import local files
+//
+// Local files can be imported directly using relative paths, for example:
+// import socket from "./socket"

assets/js/socket.js

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+// NOTE: The contents of this file will only be executed if
+// you uncomment its entry in "assets/js/app.js".
+
+// To use Phoenix channels, the first step is to import Socket,
+// and connect at the socket path in "lib/web/endpoint.ex".
+//
+// Pass the token on params as below. Or remove it
+// from the params if you are not using authentication.
+import {Socket} from "phoenix"
+
+let socket = new Socket("/socket", {params: {token: window.userToken}})
+
+// When you connect, you'll often need to authenticate the client.
+// For example, imagine you have an authentication plug, `MyAuth`,
+// which authenticates the session and assigns a `:current_user`.
+// If the current user exists you can assign the user's token in
+// the connection for use in the layout.
+//
+// In your "lib/web/router.ex":
+//
+//     pipeline :browser do
+//       ...
+//       plug MyAuth
+//       plug :put_user_token
+//     end
+//
+//     defp put_user_token(conn, _) do
+//       if current_user = conn.assigns[:current_user] do
+//         token = Phoenix.Token.sign(conn, "user socket", current_user.id)
+//         assign(conn, :user_token, token)
+//       else
+//         conn
+//       end
+//     end
+//
+// Now you need to pass this token to JavaScript. You can do so
+// inside a script tag in "lib/web/templates/layout/app.html.eex":
+//
+//     <script>window.userToken = "<%= assigns[:user_token] %>";</script>
+//
+// You will need to verify the user token in the "connect/3" function
+// in "lib/web/channels/user_socket.ex":
+//
+//     def connect(%{"token" => token}, socket, _connect_info) do
+//       # max_age: 1209600 is equivalent to two weeks in seconds
+//       case Phoenix.Token.verify(socket, "user socket", token, max_age: 1209600) do
+//         {:ok, user_id} ->
+//           {:ok, assign(socket, :user, user_id)}
+//         {:error, reason} ->
+//           :error
+//       end
+//     end
+//
+// Finally, connect to the socket:
+socket.connect()
+
+// Now that you are connected, you can join channels with a topic:
+let channel = socket.channel("topic:subtopic", {})
+channel.join()
+  .receive("ok", resp => { console.log("Joined successfully", resp) })
+  .receive("error", resp => { console.log("Unable to join", resp) })
+
+export default socket