implement creation of link on first step in backend

assets/js/app.js

@@ -44,31 +44,3 @@ window.liveSocket = liveSocket
 window.Components = {
   SplashPage, JustPage, ForPage, YouPage
 }
-
-// const root_el = document.getElementById("root");
-// const page = root_el.getAttribute("page")
-// let result;
-
-// switch(page) {
-//   case "splash": 
-//     result = <SplashPage />
-//     break;
-//   case "just":
-//     result = <JustPage />
-//     break;
-//   case "for":
-//   case "you":
-//   case "identify":
-//   case "revealed":
-//   default:
-//     null
-//     break;
-// }
-
-// ReactDOM.render(<React.StrictMode>
-//     <GlobalStyle />
-//     { result }
-//   </React.StrictMode>
-//   ,
-//   root_el
-// );

assets/js/pages/JustPage.tsx

@@ -7,7 +7,6 @@ const JustPage = () => {
   const [secretInput, setSecretInput] = useState("");
   const [fileInput, setFileInput] = useState<File | null>(null);
   const [fileName, setFileName] = useState("");
-  const [encryptedSecret, setEncryptedSecret] = useState("");
 
   const handleChange = (e: React.ChangeEvent<HTMLTextAreaElement>) => {
     setSecretInput(e.target.value);
@@ -45,18 +44,13 @@ const JustPage = () => {
       encoded
     );
 
-    // encrypted will be sent to lumen backend
-    HexMix.arrayBufferToString(encrypted, (result: string) => {
-      setEncryptedSecret(result);
-    });
-
     const keyHex = HexMix.uint8ToHex(new Uint8Array(exported));
     const ivHex = HexMix.uint8ToHex(iv);
 
     const formData = new FormData();
     const blobData = new Blob([encrypted]);
 
-    formData.append('blob', blobData);
+    formData.append('text_content', blobData);
     formData.append('filetype', 'text/plain');
     formData.append('filename', 'secret.txt');
 
@@ -94,7 +88,6 @@ const JustPage = () => {
           </TextAlignWrapper>
           <Spacer space="1.6rem" />
           <FileInput id="fileInput" value={fileName} handleFile={handleFile} />
-          { encryptedSecret ? "" : encryptedSecret }
           { fileInput ? "" : ""}
           <Spacer space="4rem" />
           <div

assets/js/utils/hexmix.ts

@@ -0,0 +1,33 @@
+export default {
+    uint8ToHex(data: Uint8Array): string {
+      return Array.prototype.map.call(data, (byte: number) => {
+        return ('00' + byte.toString(16)).slice(-2);
+      }).join('');
+    },  
+    hexToUint8(data: string): Uint8Array {
+      const hexArray = data.match(/.{1,2}/g);
+      if (!hexArray) return new Uint8Array(0);
+  
+      return Uint8Array.from(hexArray.map((char: string) => {
+        return parseInt(char, 16)
+      }));
+    },
+    arrayBufferToString(buf: ArrayBuffer, callback: Function) {
+      const reader = new FileReader();
+      reader.onload = function (event: ProgressEvent<FileReader>) {
+        callback(event?.target?.result);
+      };
+      reader.onerror = function (event: ProgressEvent<FileReader>) {
+        alert(event?.target?.error);
+      };
+      reader.readAsBinaryString(new Blob([ buf ],
+        { type: 'application/octet-stream' }));
+    },
+    stringToArrayBuffer(str: string) {
+      const array = new Uint8Array(str.length);
+      for(let i = 0; i < str.length; i++) {
+        array[i] = str.charCodeAt(i);
+      }
+      return array.buffer
+    }
+  }

lib/entendu/links/link.ex

@@ -5,6 +5,10 @@ defmodule Entendu.Links.Link do
   schema "links" do
     field :burn_after_reading, :boolean, default: false
     field :expires, :utc_datetime
+    field :filename, :string
+    field :filetype, :string
+    field :text_content, :string
+    field :file_content, :string
 
     timestamps()
   end
@@ -12,7 +16,7 @@ defmodule Entendu.Links.Link do
   @doc false
   def changeset(link, attrs) do
     link
-    |> cast(attrs, [:expires, :burn_after_reading])
-    |> validate_required([:expires, :burn_after_reading])
+    |> cast(attrs, [:expires, :burn_after_reading, :filename, :filetype, :text_content, :file_content])
+    |> validate_required([:expires, :burn_after_reading, :filename, :filetype])
   end
 end

lib/entendu_web/controllers/link_controller.ex

@@ -4,22 +4,40 @@ defmodule EntenduWeb.LinkController do
   """
 
   use EntenduWeb, :controller
+  use Params
+
+  alias Entendu.Links
+  alias Links.Link
+  alias Ecto.Changeset
 
   def just_page(conn, _params) do
     render(conn, "just.html")
   end
 
-  def just(conn, %{encrypted_contents: contents}) do
-    conn
-    |> put_session(:encrypted_contents, contents)
-    |> redirect(to: "/just/for")
+  defparams first_step %{
+    burn_after_reading: [field: :boolean, default: false],
+    expires: :utc_datetime,
+    filename: :string,
+    filetype: :string,
+    text_content: :string,
+    file_content: :string
+  }
+
+  def just(conn, params) do
+    with %Changeset{valid?: true} = changeset <- first_step(params),
+        link_params <- Params.to_map(changeset),
+        {:ok, %Link{} = link} <- Links.create_link(link_params) do
+      conn
+      |> assign(:link, link)
+      |> render("show_authorized", link: link)
+    end
   end
 
   def for_page(conn, _params) do
     render(conn, "for.html")
   end
 
-  def for(conn, %{username: username, service: service}) do
+  def for(_conn, %{username: _username, service: _service}) do
     {:error, "not implemented"}
   end
 

lib/entendu_web/views/link_view.ex

@@ -1,3 +1,22 @@
 defmodule EntenduWeb.LinkView do
   use EntenduWeb, :view
+  alias EntenduWeb.LinkView
+
+  def render("show_authorized.json", %{link: link}) do
+    %{
+      id: link.id,
+      burn_after_reading: link.burn_after_reading,
+      expires: link.expires,
+      filename: link.filename,
+      filetype: link.filetype,
+      text_content: link.text_content,
+      file_content: link.file_content
+    }
+  end
+
+  def render("show_unauthorized.json", %{link: link}) do
+    %{
+      id: link.id
+    }
+  end
 end

mix.exs

@@ -50,7 +50,8 @@ defmodule Entendu.MixProject do
       {:libcluster, "~> 3.2"},
       {:ueberauth, "~> 0.7.0"},
       {:ueberauth_github, "~> 0.8.1"},
-      {:react_phoenix, "~> 1.3"}
+      {:react_phoenix, "~> 1.3"},
+      {:params, "~> 2.2"}
     ]
   end
 

mix.lock

@@ -20,6 +20,7 @@
   "mime": {:hex, :mime, "2.0.2", "0b9e1a4c840eafb68d820b0e2158ef5c49385d17fb36855ac6e7e087d4b1dcc5", [:mix], [], "hexpm", "e6a3f76b4c277739e36c2e21a2c640778ba4c3846189d5ab19f97f126df5f9b7"},
   "mimerl": {:hex, :mimerl, "1.2.0", "67e2d3f571088d5cfd3e550c383094b47159f3eee8ffa08e64106cdf5e981be3", [:rebar3], [], "hexpm", "f278585650aa581986264638ebf698f8bb19df297f66ad91b18910dfc6e19323"},
   "oauth2": {:hex, :oauth2, "2.0.0", "338382079fe16c514420fa218b0903f8ad2d4bfc0ad0c9f988867dfa246731b0", [:mix], [{:hackney, "~> 1.13", [hex: :hackney, repo: "hexpm", optional: false]}], "hexpm", "881b8364ac7385f9fddc7949379cbe3f7081da37233a1aa7aab844670a91e7e7"},
+  "params": {:hex, :params, "2.2.0", "2fa495b1123ad0bdfeba44dcfb2738d99b6d933fd026ff1b8c36761decd1353a", [:mix], [{:ecto, "~> 2.0 or ~> 3.0", [hex: :ecto, repo: "hexpm", optional: false]}], "hexpm", "22262ecff055995e4283f32c05f105f0727a07227bf95f4cf24629c7271d2689"},
   "parse_trans": {:hex, :parse_trans, "3.3.1", "16328ab840cc09919bd10dab29e431da3af9e9e7e7e6f0089dd5a2d2820011d8", [:rebar3], [], "hexpm", "07cd9577885f56362d414e8c4c4e6bdf10d43a8767abb92d24cbe8b24c54888b"},
   "phoenix": {:hex, :phoenix, "1.5.10", "3ee7d5c17ff9626d72d374d8fc8909bf00f4323fd15549fbe3abbbd38b5299c8", [:mix], [{:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: true]}, {:phoenix_html, "~> 2.13 or ~> 3.0", [hex: :phoenix_html, repo: "hexpm", optional: true]}, {:phoenix_pubsub, "~> 2.0", [hex: :phoenix_pubsub, repo: "hexpm", optional: false]}, {:plug, "~> 1.10", [hex: :plug, repo: "hexpm", optional: false]}, {:plug_cowboy, "~> 1.0 or ~> 2.2", [hex: :plug_cowboy, repo: "hexpm", optional: true]}, {:plug_crypto, "~> 1.1.2 or ~> 1.2", [hex: :plug_crypto, repo: "hexpm", optional: false]}, {:telemetry, "~> 0.4", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "f9c2eaa5a8fe5a412610c6aa84ccdb6f3e92f333d4df7fbaeb0d5a157dbfb48d"},
   "phoenix_ecto": {:hex, :phoenix_ecto, "4.3.0", "2c69a452c2e0ee8c93345ae1cdc1696ef4877ff9cbb15c305def41960c3c4ebf", [:mix], [{:ecto, "~> 3.0", [hex: :ecto, repo: "hexpm", optional: false]}, {:phoenix_html, "~> 2.14.2 or ~> 3.0", [hex: :phoenix_html, repo: "hexpm", optional: true]}, {:plug, "~> 1.0", [hex: :plug, repo: "hexpm", optional: false]}], "hexpm", "0ac491924217550c8f42c81c1f390b5d81517d12ceaf9abf3e701156760a848e"},

priv/repo/migrations/20211130021804_add_filename_to_links.exs

@@ -0,0 +1,13 @@
+defmodule Entendu.Repo.Migrations.AddFilenameToLinks do
+  use Ecto.Migration
+
+  def change do
+    alter table(:links) do
+      remove_if_exists(:content, :string)
+      add :filename, :string
+      add :filetype, :string
+      add :text_content, :string
+      add :file_content, :string
+    end
+  end
+end