Add QR Code pushes

app/controllers/api/v1/pushes_controller.rb

@@ -84,7 +84,7 @@ def show
     param :expire_after_views, Integer, desc: "Expire secret link and delete after this many views."
     param :deletable_by_viewer, %w[true false], desc: "Allow users to delete passwords once retrieved."
     param :retrieval_step, %w[true false], desc: "Helps to avoid chat systems and URL scanners from eating up views."
-    param :kind, %w[text file url], desc: "The kind of push to create. Defaults to 'text'.", required: false
+    param :kind, %w[text file url qr], desc: "The kind of push to create. Defaults to 'text'.", required: false
   end
   formats ["JSON"]
   description <<-EOS
@@ -95,6 +95,7 @@ def show
     * Text/password (default)
     * File attachments (requires authentication & subscription)
     * URLs
+    * QR codes
 
     === Required Parameters
 
@@ -153,6 +154,10 @@ def create
     @push = Push.new(push_params)
 
     if !push_params[:kind].present?
+      # These are used to determine the default kind based on the request path
+      # for old push records. Their paths are generated based on their kind.
+      # And, QR code pushes are created by using `/p/` path.
+      # So, it is not necessary to check for a special path.
       @push.kind = if request.path.include?("/f.json")
         "file"
       elsif request.path.include?("/r.json")

app/controllers/pushes_controller.rb

@@ -4,7 +4,7 @@ class PushesController < BaseController
   include SetPushAttributes
   include LogEvents
 
-  before_action :set_push, except: %i[new create index]
+  before_action :set_push, except: %i[new create index qr_preview]
   before_action :check_allowed
 
   def show
@@ -127,6 +127,8 @@ def create
         @files_tab = true
       elsif @push.kind == "url"
         @url_tab = true
+      elsif @push.kind == "qr"
+        @qr_tab = true
       else
         @text_tab = true
       end
@@ -150,6 +152,11 @@ def print_preview
     render action: "print_preview", layout: "naked"
   end
 
+  def qr_preview
+    @content = params[:content]
+    render partial: "qr_preview", layout: false
+  end
+
   def preliminary
     # This password may have expired since the last view.  Validate the password
     # expiration before doing anything.
@@ -263,6 +270,9 @@ def set_kind_by_tab
       elsif params["tab"] == "url"
         @push.kind = "url"
         @url_tab = true
+      elsif params["tab"] == "qr"
+        @push.kind = "qr"
+        @qr_tab = true
       else
         @push.kind = "text"
         @text_tab = true
@@ -291,6 +301,8 @@ def check_allowed
         "file"
       when "url"
         "url"
+      when "qr"
+        "qr"
       else
         "text"
       end
@@ -319,6 +331,16 @@ def check_allowed
       else
         redirect_to root_path, notice: t("pushes.url_pushes_disabled")
       end
+
+    when "qr"
+      # QR code pushes only enabled when logins are enabled.
+      if Settings.enable_logins && Settings.enable_qr_pushes
+        unless %w[preliminary passphrase access show expire].include?(action_name)
+          authenticate_user!
+        end
+      else
+        redirect_to root_path, notice: t("pushes.qr_pushes_disabled")
+      end
     when "text"
       unless %w[new create preview print_preview preliminary passphrase access show expire].include?(action_name)
         authenticate_user!

app/helpers/pushes_helper.rb

@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require "rqrcode"
+
 module PushesHelper
   def filesize(size)
     units = %w[B KiB MiB GiB TiB Pib EiB ZiB]
@@ -12,4 +14,14 @@ def filesize(size)
 
     format("%.1f #{units[exp]}", size.to_f / (1024**exp))
   end
+
+  def qr_code(url)
+    RQRCode::QRCode.new(url).as_svg(
+      offset: 0,
+      color: :currentColor,
+      shape_rendering: "crispEdges",
+      module_size: 6,
+      standalone: true
+    ).html_safe
+  end
 end

app/models/push.rb

@@ -3,7 +3,7 @@
 require "addressable/uri"
 
 class Push < ApplicationRecord
-  enum :kind, [:text, :file, :url], validate: true
+  enum :kind, [:text, :file, :url, :qr], validate: true
 
   validate :check_enabled_push_kinds
   validates :url_token, presence: true, uniqueness: true
@@ -16,6 +16,7 @@ class Push < ApplicationRecord
     create.after_validation :check_payload_for_text, if: :text?
     create.after_validation :check_files_for_file, if: :file?
     create.after_validation :check_payload_for_url, if: :url?
+    create.after_validation :check_payload_for_qr, if: :qr?
   end
 
   belongs_to :user, optional: true
@@ -135,6 +136,17 @@ def check_payload_for_url
     end
   end
 
+  def check_payload_for_qr
+    if payload.present?
+      # If the push is a QR code, max payload length is 1024 characters
+      if payload.length > 1024
+        errors.add(:payload, t("pushes.create.qr_max_length", count: 1024))
+      end
+    else
+      errors.add(:payload, I18n.t("pushes.create.payload_required"))
+    end
+  end
+
   def set_expire_limits
     self.expire_after_days ||= settings_for_kind.expire_after_days_default
     self.expire_after_views ||= settings_for_kind.expire_after_views_default
@@ -177,6 +189,8 @@ def settings_for_kind
       Settings.url
     elsif file?
       Settings.files
+    elsif qr?
+      Settings.qr
     end
   end
 
@@ -188,6 +202,10 @@ def check_enabled_push_kinds
     if kind == "url" && !(Settings.enable_logins && Settings.enable_url_pushes)
       errors.add(:kind, I18n.t("pushes.url_pushes_disabled"))
     end
+
+    if kind == "qr" && !(Settings.enable_logins && Settings.enable_qr_pushes)
+      errors.add(:kind, I18n.t("pushes.qr_pushes_disabled"))
+    end
   end
 
   def set_default_attributes

app/views/pushes/_qr_form.html.erb

@@ -0,0 +1,196 @@
+<% title(_('Securely Send a Password')) %>
+
+<div class='container'
+    data-controller="knobs pwgen passwords form"
+    data-knobs-tab-name-value="password"
+    data-knobs-lang-day-value="<%= _('Day') %>"
+    data-knobs-lang-days-value="<%= _('Days') %>"
+    data-knobs-default-days-value="<%= @push.settings_for_kind.expire_after_days_default %>"
+    data-knobs-lang-view-value="<%= _('View') %>"
+    data-knobs-lang-views-value="<%= _('Views') %>"
+    data-knobs-default-views-value="<%= @push.settings_for_kind.expire_after_views_default %>"
+    data-knobs-lang-save-value="<%= _('Save') %>"
+    data-knobs-lang-saved-value="<%= _('Saved!') %>"
+    data-knobs-default-retrieval-step-value="<%= @push.settings_for_kind.retrieval_step_default %>"
+    data-knobs-default-deletable-by-viewer-value="<%= @push.settings_for_kind.deletable_pushes_default %>"
+    data-pwgen-use-numbers-default-value="<%= Settings.gen.has_numbers %>"
+    data-pwgen-title-cased-default-value="<%= Settings.gen.title_cased %>"
+    data-pwgen-use-separators-default-value="<%= Settings.gen.use_separators %>"
+    data-pwgen-consonants-default-value="<%= Settings.gen.consonants %>"
+    data-pwgen-vowels-default-value="<%= Settings.gen.vowels %>"
+    data-pwgen-separators-default-value="<%= Settings.gen.separators %>"
+    data-pwgen-min-syllable-length-default-value="<%= Settings.gen.min_syllable_length %>"
+    data-pwgen-max-syllable-length-default-value="<%= Settings.gen.max_syllable_length %>"
+    data-pwgen-syllables-count-default-value="<%= Settings.gen.syllables_count %>"
+    data-knobs-ga-enabled-value="<%= ENV.key?('GA_ENABLE') %>">
+<%= render partial: "shared/topnav" %>
+<%= form_for @push, data: { action: 'form#submit' } do |f| %>
+    <%= f.hidden_field :kind, value: :qr %>
+
+    <div class='row'>
+        <div class='col'>
+            <%= f.text_area(:payload, { class: "form-control",
+                                        rows: 4,
+                                        placeholder: _('Enter the Password or Text to push...'),
+                                        autocomplete: "off",
+                                        spellcheck: "false",
+                                        maxlength: 1024,
+                                        autofocus: true,
+                                        required: true,
+                                        "data-pwgen-target" => "payloadInput",
+                                        "data-passwords-target" => "payloadInput",
+                                        "data-action" => "input->passwords#updateCharacterCount"
+                                         }) %>
+            <div class='position-relative'>
+                <div id="the-count" class="position-absolute bottom-0 end-0 m-2 px-3 opacity-75">
+                    <span id="current" data-passwords-target="currentChars">0</span>
+                    <span id="maximum" data-passwords-target="maximumChars">/ 1024 <%= _('Characters') %></span>
+                </div>
+            </div>
+        </div>
+    </div>
+    <div class='row'>
+        <div class='col-12 col-sm-8 p-3'>
+            <div class='row'>
+                <div><%= _('Expire secret link and delete after:') %></div>
+                <div class='col-10'>
+                    <%= range_field_tag("push_expire_after_days", @push.settings_for_kind.expire_after_days_default,
+                                        { :name => "push[expire_after_days]",
+                                          :class => "form-range",
+                                          :min => @push.settings_for_kind.expire_after_days_min,
+                                          :max => @push.settings_for_kind.expire_after_days_max,
+                                          :step => "1",
+                                          "data-action" => "change->knobs#updateDaysSlider input->knobs#updateDaysSlider",
+                                          "data-knobs-target" => "daysRange"
+                                        }) %>
+                </div>
+                <div class='col-2'>
+                    <div class="form-text" data-knobs-target="daysRangeLabel"><%= @push.settings_for_kind.expire_after_days_default %> <%= _('Days') %></div>
+                </div>
+            </div>
+            <div class='row'>
+                <div class='col-10'>
+                    <%= range_field_tag("push_expire_after_views", @push.settings_for_kind.expire_after_views_default,
+                                        { :name => "push[expire_after_views]",
+                                            :class => "form-range",
+                                            :min => @push.settings_for_kind.expire_after_views_min,
+                                            :max => @push.settings_for_kind.expire_after_views_max,
+                                            :step => "1",
+                                            "data-action" => "change->knobs#updateViewsSlider input->knobs#updateViewsSlider",
+                                            "data-knobs-target" => "viewsRange"
+                                        }) %>
+                </div>
+
+                <div class='col-2'>
+                    <div class="form-text" data-knobs-target="viewsRangeLabel"><%= @push.settings_for_kind.expire_after_views_default %> <%= _('Views') %></div>
+                </div>
+            </div>
+            <div class='row'>
+                <div class='col'>
+                    <p class='text-center form-text'><%= _('(whichever comes first)') %></p>
+                </div>
+            </div>
+
+            <div class='row mb-3'>
+                <div class='col'>
+                    <div class="list-group mx-0">
+                        <% if @push.settings_for_kind.enable_retrieval_step %>
+                            <label class="list-group-item d-flex gap-2">
+                            <%= check_box_tag "push[retrieval_step]", nil, @push.settings_for_kind.retrieval_step_default,
+                                            { class: 'form-check-input flex-shrink-0',
+                                              "data-knobs-target" => "retrievalStepCheckbox" } %>
+                            <span>
+                                <%= _('Use a 1-click retrieval step') %>
+                                <small class="d-block text-muted"><%= _('Helps to avoid chat systems and URL scanners from eating up views.') %></small>
+                            </span>
+                            </label>
+                        <% end %>
+                        <% if @push.settings_for_kind.enable_deletable_pushes %>
+                            <label class="list-group-item d-flex gap-2">
+                            <%= check_box_tag "push[deletable_by_viewer]", nil, @push.settings_for_kind.deletable_pushes_default,
+                                            { class: 'form-check-input flex-shrink-0',
+                                              "data-knobs-target" => "deletableByViewerCheckbox" } %>
+                            <span>
+                                <%= _('Allow immediate deletion') %>
+                                <small class="d-block text-muted"><%= _('Allow users to delete this push once retrieved.') %></small>
+                            </span>
+                            </label>
+                        <% end %>
+                    </div>
+                </div>
+            </div>
+            <div class='row mb-3'>
+                <div class='col'>
+                    <div class="input-group">
+                        <span class="input-group-text"><%= _('Passphrase Lockdown') %></span>
+                        <%= f.text_field(:passphrase, { class: "form-control",
+                                                        autocomplete: "off",
+                                                        placeholder: _('Optional: Require recipients to enter a passphrase to view this push') }) %>
+                    </div>
+                </div>
+            </div>
+            <div class='row'>
+                <div class='col'>
+                    <p class='mb-3'>
+                        <div id='cookie-save'>
+                            <a data-action="click->knobs#saveSettings" href="#"><%= _('Save') %></a> <%= _('the above settings as the page default.') %>
+                        </div>
+                    </p>
+                </div>
+            </div>
+        </div>
+        <div class='col-12 col-sm-4 p-3 mt-3'>
+            <div class="row mb-3">
+                <div class="btn-group mb-3" role="group" aria-label="Password Generator button group with nested dropdown">
+                    <button class="btn btn-secondary w-75" type="button"
+                        id='generate_password'
+                        data-knobs-target="generatePasswordButton"
+                        data-action="pwgen#producePassword passwords#updateCharacterCount"><em class="bi bi-cpu"></em> <%= _('Generate Password') %></button>
+                    <button class="btn btn-secondary" type="button" id='configure_generator'
+                        data-action="pwgen#configureGenerator"
+                        data-bs-toggle="modal" data-bs-target="#configureModal">
+                        <em class="bi bi-gear"></em>
+                    </button>
+                </div>
+                <p class='fst-italic fw-light'><%= _('Use the button above to generate a random password.') %></p>
+            </div>
+            <% if user_signed_in? %>
+                <div class='row mb-3'>
+                    <div class="input-group">
+                        <span class="input-group-text"><%= Password.human_attribute_name(:name) %></span>
+                        <%= f.text_field(:name, { class: "form-control",
+                                                placeholder: _('Optional'),
+                                                autocomplete: "off" }) %>
+                    </div>
+                    <div class="form-text" id="basic-addon4"><%= _('A name shown in the dashboard, notifications and emails.') %></div>
+                </div>
+                <div class='row mb-3'>
+                    <div class="input-group">
+                        <span class="input-group-text"><%= _('Reference Note') %></span>
+                        <%= f.text_area(:note, { class: "form-control",
+                                                rows: 1,
+                                                placeholder: _('Optional'),
+                                                autocomplete: "off" }) %>
+                    </div>
+                    <div class="form-text" id="basic-addon4"><%= _('Encrypted and visible only to you') %></div>
+                </div>
+            <% end %>
+            <div class='row my-3 px-5'> <hr> </div>
+            <div class='row mb-3'>
+                <p class='fst-italic'><%= _('Tip: Only enter a password into the box.  Other identifying information can compromise security.') %></p>
+                <p class='fst-italic fw-light'><%= _('All passwords are encrypted prior to storage and are available to only those with the secret link.  Once expired, encrypted passwords are unequivocally deleted from the database.') %></p>
+            </div>
+        </div>
+    </div>
+    <div class='row'>
+        <div class='col'>
+            <p class='my-3'>
+                <button class="form-control btn btn-primary" type="submit" data-form-target="pushit" data-disable-with="Pushing..."><%= _('Push It!') %></button>
+            </p>
+        </div>
+    </div>
+<% end %>
+
+<%= render partial: 'shared/pw_generator_modal', cached: true %>
+
+</div>

app/views/pushes/_show_payload.html.erb

@@ -0,0 +1,13 @@
+<div class='text-center m-3'>
+    <p class=""><strong><%= _('Please obtain and securely store this content in a secure manner, such as in a password manager.') %></strong></p>
+    <% if Settings.pw.enable_blur %>
+        <p class="text-muted"><%= _('Your password is blurred out.  Click below to reveal it.') %></p>
+    <% end %>
+    <%= render partial: 'shared/copy_button', cached: true %>
+    </div>
+
+    <% if payload.chomp.match?(/\n/) || payload.length > 100 %>
+    <div class='payload <%= blur_css_class %> notranslate px-5 border-top border-bottom border-5 w-100 bg-white d-flex justify-content-center' id='push_payload' translate='no' data-copy-target="payloadDiv"><pre class='text-break my-5'><%= payload %></pre></div>
+    <% else %>
+    <div class='payload <%= blur_css_class %> notranslate px-5 border-top border-bottom border-5 w-100 bg-white fs-2' id='push_payload' translate='no' data-copy-target="payloadDiv"><pre class='w-100 text-break text-wrap my-5 text-center'><%= payload %></pre></div>
+<% end %>

app/views/pushes/_show_qr.html.erb

@@ -0,0 +1,4 @@
+<div class='text-center m-3'>
+    <p class=""><strong><%= _('Please obtain and securely store this content in a secure manner, such as in a password manager.') %></strong></p>
+    <%= qr_code(push.payload) %>
+<div>

app/views/pushes/index.html.erb

@@ -55,6 +55,8 @@
               File(s)
             <% elsif push.url? %>
               URL
+            <% elsif push.qr? %>
+              QR Code
             <% else %>
               Text
             <% end %>