Add document and library views

app/controllers/application_controller.rb

@@ -91,4 +91,18 @@ def user_not_authorized
     flash[:alert] = 'You are not authorized to perform this action.'
     redirect_back(fallback_location: root_path)
   end
+
+  # Tracks a view for any viewable object (Document, Library, etc.)
+  # Updates the timestamp if the user has already viewed this item
+  # @param viewable [ActiveRecord::Base] the object being viewed (must have viewed_items association)
+  def track_view(viewable)
+    return unless current_user
+
+    viewed_item = ViewedItem.find_or_initialize_by(
+      user: current_user,
+      viewable: viewable
+    )
+    viewed_item.viewed_at = Time.current
+    viewed_item.save
+  end
 end

app/controllers/dashboard_controller.rb

@@ -11,5 +11,9 @@ def index
                                   .group('assistants.id')
                                   .order('last_chat_time DESC')
                                   .limit(5)
+    @recently_viewed_documents = current_user.recently_viewed_documents(limit: 5)
+                                             .includes(:viewed_items)
+    @recently_viewed_libraries = current_user.recently_viewed_libraries(limit: 5)
+                                             .includes(:viewed_items)
   end
 end

app/controllers/documents_controller.rb

@@ -15,6 +15,9 @@ def edit
 
   # GET /documents/1 or /documents/1.json
   def show
+    # Track view for authenticated users
+    track_view(@document)
+
     # Handle flagging functionality (requires user to be logged in)
     if params[:flag] && current_user
       @document.disliked_by current_user, vote_scope: 'flag'

app/controllers/libraries_controller.rb

@@ -12,7 +12,10 @@ def edit
   end
 
   # GET /libraries/1 or /libraries/1.json
-  def show; end
+  def show
+    # Track view for authenticated users
+    track_view(@library)
+  end
 
   def users
     @library = Library.find(params[:id])

app/models/document.rb

@@ -9,6 +9,21 @@ class Document < ApplicationRecord
   has_many :comments, dependent: :destroy
   has_neighbors :embedding
 
+  # Recently viewed items feature
+  has_many :viewed_items, as: :viewable, dependent: :destroy
+
+  # Returns the number of unique users who have viewed this document
+  # Note: Due to the unique index on [user_id, viewable_type, viewable_id],
+  # each user can only have one view record per document. When a user views
+  # the document multiple times, only the timestamp is updated.
+  # @return [Integer] the number of unique users who have viewed this document
+  def unique_viewers
+    viewed_items.count
+  end
+
+  # Alias for backward compatibility
+  alias total_views unique_viewers
+
   # Primary search scope using PostgreSQL full-text search
   # Searches across both title and document content with strict word matching
   # - prefix: true allows partial word matching (e.g., "test" matches "testing")

app/models/library.rb

@@ -10,6 +10,9 @@ class Library < ApplicationRecord
   has_many :library_users, dependent: :destroy
   has_many :users, through: :library_users
 
+  # Recently viewed items feature
+  has_many :viewed_items, as: :viewable, dependent: :destroy
+
   pg_search_scope :search_by_name,
                   against: %i[name description],
                   using: {

app/models/user.rb

@@ -17,6 +17,44 @@ class User < ApplicationRecord
   has_many :assistants, through: :assistant_users
   has_many :comments, dependent: :destroy
 
+  # Recently viewed items feature
+  has_many :viewed_items, dependent: :destroy
+
+  # Returns the most recently viewed documents for this user
+  # @param limit [Integer] the maximum number of documents to return (default: 5)
+  # @return [ActiveRecord::Relation<Document>] the recently viewed documents, ordered by most recent first
+  def recently_viewed_documents(limit: 5)
+    Document.joins(:viewed_items)
+            .where(viewed_items: { user_id: id })
+            .order('viewed_items.viewed_at DESC')
+            .distinct
+            .limit(limit)
+  end
+
+  # Returns the most recently viewed libraries for this user
+  # @param limit [Integer] the maximum number of libraries to return (default: 5)
+  # @return [ActiveRecord::Relation<Library>] the recently viewed libraries, ordered by most recent first
+  def recently_viewed_libraries(limit: 5)
+    Library.joins(:viewed_items)
+           .where(viewed_items: { user_id: id })
+           .order('viewed_items.viewed_at DESC')
+           .distinct
+           .limit(limit)
+  end
+
+  # Generic method to get recently viewed items of any type
+  # @param viewable_type [String] the type of viewable items to retrieve (e.g., 'Document')
+  # @param limit [Integer] the maximum number of items to return (default: 5)
+  # @return [ActiveRecord::Relation] the recently viewed items
+  def recently_viewed(viewable_type:, limit: 5)
+    viewable_type.constantize
+                 .joins(:viewed_items)
+                 .where(viewed_items: { user_id: id })
+                 .order('viewed_items.viewed_at DESC')
+                 .distinct
+                 .limit(limit)
+  end
+
   private
 
   def password_strength

app/models/viewed_item.rb

@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+class ViewedItem < ApplicationRecord
+  belongs_to :user
+  belongs_to :viewable, polymorphic: true
+
+  validates :user_id, presence: true
+  validates :viewable_id, presence: true
+  validates :viewable_type, presence: true
+  validates :viewed_at, presence: true
+
+  # Ensure uniqueness at the model level as well
+  validates :user_id, uniqueness: { scope: %i[viewable_type viewable_id] }
+
+  # Scope to get most recently viewed items
+  scope :recent, -> { order(viewed_at: :desc) }
+
+  # Scope to get items for a specific viewable type
+  scope :for_type, ->(type) { where(viewable_type: type) }
+end

app/views/dashboard/index.html.erb

@@ -11,11 +11,11 @@
     <h1 class="text-2xl font-bold text-gray-800 mb-6 flex items-center">
       My Activity
     </h1>
-    <div class="grid grid-cols-1 md:grid-cols-3 gap-6">
+    <div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-6">
       <!-- Questions -->
       <div class="bg-white rounded-lg p-6 border border-gray-300">
         <div class="flex justify-between items-center mb-4">
-          <h2 class="text-lg font-semibold text-gray-700 flex items-center">
+          <h2 class="text-lg font-semibold text-gray-500 flex items-center">
             <svg xmlns="http://www.w3.org/2000/svg" class="h-5 w-5 mr-2" fill="none" viewBox="0 0 24 24" stroke="currentColor">
               <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9.879 7.519c1.171-1.025 3.071-1.025 4.242 0 1.172 1.025 1.172 2.687 0 3.712-.203.179-.43.326-.67.442-.745.361-1.45.999-1.45 1.827v.75M21 12a9 9 0 11-18 0 9 9 0 0118 0zm-9 5.25h.008v.008H12v-.008z" />
             </svg>
@@ -44,7 +44,7 @@
       <!-- Chats -->
       <div class="bg-white rounded-lg p-6 border border-gray-300">
         <div class="flex justify-between items-center mb-4">
-          <h2 class="text-lg font-semibold text-gray-700 flex items-center">
+          <h2 class="text-lg font-semibold text-gray-500 flex items-center">
             <svg xmlns="http://www.w3.org/2000/svg" class="h-5 w-5 mr-2" fill="none" viewBox="0 0 24 24" stroke="currentColor">
               <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M20.25 8.511c.884.284 1.5 1.128 1.5 2.097v4.286c0 1.136-.847 2.1-1.98 2.193-.34.027-.68.052-1.02.072v3.091l-3-3c-1.354 0-2.694-.055-4.02-.163a2.115 2.115 0 0 1-.825-.242m9.345-8.334a2.126 2.126 0 0 0-.476-.095 48.64 48.64 0 0 0-8.048 0c-1.131.094-1.976 1.057-1.976 2.192v4.286c0 .837.46 1.58 1.155 1.951m9.345-8.334V6.637c0-1.621-1.152-3.026-2.76-3.235A48.455 48.455 0 0 0 11.25 3c-2.115 0-4.198.137-6.24.402-1.608.209-2.76 1.614-2.76 3.235v6.226c0 1.621 1.152 3.026 2.76 3.235.577.075 1.157.14 1.74.194V21l4.155-4.155" />
             </svg>
@@ -70,32 +70,65 @@
           <% end %>
         </div>
       </div>
-      <!-- Assistants -->
+
+      <!-- Recently Viewed Documents -->
       <div class="bg-white rounded-lg p-6 border border-gray-300">
         <div class="flex justify-between items-center mb-4">
-          <h2 class="text-lg font-semibold text-gray-700 flex items-center">
+          <h2 class="text-lg font-semibold text-gray-500 flex items-center">
             <svg xmlns="http://www.w3.org/2000/svg" class="h-5 w-5 mr-2" fill="none" viewBox="0 0 24 24" stroke="currentColor">
-              <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9.813 15.904 9 18.75l-.813-2.846a4.5 4.5 0 0 0-3.09-3.09L2.25 12l2.846-.813a4.5 4.5 0 0 0 3.09-3.09L9 5.25l.813 2.846a4.5 4.5 0 0 0 3.09 3.09L15.75 12l-2.846.813a4.5 4.5 0 0 0-3.09 3.09ZM18.259 8.715 18 9.75l-.259-1.035a3.375 3.375 0 0 0-2.455-2.456L14.25 6l1.036-.259a3.375 3.375 0 0 0 2.455-2.456L18 2.25l.259 1.035a3.375 3.375 0 0 0 2.456 2.456L21.75 6l-1.035.259a3.375 3.375 0 0 0-2.456 2.456ZM16.894 20.567 16.5 21.75l-.394-1.183a2.25 2.25 0 0 0-1.423-1.423L13.5 18.75l1.183-.394a2.25 2.25 0 0 0 1.423-1.423l.394-1.183.394 1.183a2.25 2.25 0 0 0 1.423 1.423l1.183.394-1.183.394a2.25 2.25 0 0 0-1.423 1.423Z" />
+              <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M2.036 12.322a1.012 1.012 0 0 1 0-.639C3.423 7.51 7.36 4.5 12 4.5c4.638 0 8.573 3.007 9.963 7.178.07.207.07.431 0 .639C20.577 16.49 16.64 19.5 12 19.5c-4.638 0-8.573-3.007-9.963-7.178Z" />
+              <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 12a3 3 0 1 1-6 0 3 3 0 0 1 6 0Z" />
             </svg>
-            Assistants
+            Documents
           </h2>
-          <%= link_to assistants_path, class: "inline-flex items-center px-3 py-1 border border-sky-500 text-sky-500 text-sm font-medium rounded-md hover:bg-sky-500 hover:text-white transition-colors duration-200" do %>
+          <%= link_to documents_path, class: "inline-flex items-center px-3 py-1 border border-sky-500 text-sky-500 text-sm font-medium rounded-md hover:bg-sky-500 hover:text-white transition-colors duration-200" do %>
             More
             <svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4 ml-1" fill="none" viewBox="0 0 24 24" stroke="currentColor">
               <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 5l7 7-7 7" />
             </svg>
           <% end %>
         </div>
         <div class="">
-          <% if @recent_assistants.any? %>
-            <% @recent_assistants.each do |assistant| %>
+          <% if @recently_viewed_documents.any? %>
+            <% @recently_viewed_documents.each do |document| %>
+              <% viewed_item = document.viewed_items.find_by(user: current_user) %>
               <%= render "dashboard/list_item",
-                path: assistant_path(assistant),
-                title: assistant.name,
-                subtitle: "Last active #{time_ago_in_words(assistant.last_chat_time)} ago" %>
+                path: document_path(document),
+                title: document.title.truncate(50),
+                subtitle: "Viewed #{time_ago_in_words(viewed_item.viewed_at)} ago" %>
             <% end %>
           <% else %>
-            <p class="text-gray-400 italic">No recent assistants</p>
+            <p class="text-gray-400 italic">No recently viewed documents</p>
+          <% end %>
+        </div>
+      </div>
+      <!-- Recently Viewed Libraries -->
+      <div class="bg-white rounded-lg p-6 border border-gray-300">
+        <div class="flex justify-between items-center mb-4">
+          <h2 class="text-lg font-semibold text-gray-500 flex items-center">
+            <svg xmlns="http://www.w3.org/2000/svg" class="h-5 w-5 mr-2" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+              <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 6.042A8.967 8.967 0 0 0 6 3.75c-1.052 0-2.062.18-3 .512v14.25A8.987 8.987 0 0 1 6 18c2.305 0 4.408.867 6 2.292m0-14.25a8.966 8.966 0 0 1 6-2.292c1.052 0 2.062.18 3 .512v14.25A8.987 8.987 0 0 0 18 18a8.967 8.967 0 0 0-6 2.292m0-14.25v14.25" />
+            </svg>
+            Libraries
+          </h2>
+          <%= link_to libraries_path, class: "inline-flex items-center px-3 py-1 border border-sky-500 text-sky-500 text-sm font-medium rounded-md hover:bg-sky-500 hover:text-white transition-colors duration-200" do %>
+            More
+            <svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4 ml-1" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+              <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 5l7 7-7 7" />
+            </svg>
+          <% end %>
+        </div>
+        <div class="">
+          <% if @recently_viewed_libraries.any? %>
+            <% @recently_viewed_libraries.each do |library| %>
+              <% viewed_item = library.viewed_items.find_by(user: current_user) %>
+              <%= render "dashboard/list_item",
+                path: library_path(library),
+                title: library.name.truncate(50),
+                subtitle: "Viewed #{time_ago_in_words(viewed_item.viewed_at)} ago" %>
+            <% end %>
+          <% else %>
+            <p class="text-gray-400 italic">No recently viewed libraries</p>
           <% end %>
         </div>
       </div>

app/views/documents/_document.html.erb

@@ -26,7 +26,7 @@
                             "turbo-method": "delete",
                             "turbo-confirm": "Are you sure you want to delete this document?" 
                           },
-                          class: "border text-red-700 border-red-300 py-3 px-5 bg-white text-sm #{'rounded-l-lg' if document.deleted?} rounded-r-lg hover:bg-red-50 hover:text-red-800" %>
+                          class: "border border-sky-500 text-red-700 py-3 px-5 bg-white text-sm #{'rounded-l-lg' if document.deleted?} rounded-r-lg hover:bg-red-50 hover:text-red-800" %>
             <% end %>
           <% end %>
         </div>
@@ -62,6 +62,15 @@
 
       <!-- Voting and Flag Buttons on the right side -->
       <div class="flex items-center mx-4 space-x-2">
+        <!-- Unique Viewers Count -->
+        <div class="flex items-center px-3 py-1 text-sm bg-blue-50 text-blue-800 border border-blue-200 rounded-full" title="Unique viewers">
+          <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="size-4 mr-1">
+            <path stroke-linecap="round" stroke-linejoin="round" d="M2.036 12.322a1.012 1.012 0 0 1 0-.639C3.423 7.51 7.36 4.5 12 4.5c4.638 0 8.573 3.007 9.963 7.178.07.207.07.431 0 .639C20.577 16.49 16.64 19.5 12 19.5c-4.638 0-8.573-3.007-9.963-7.178Z" />
+            <path stroke-linecap="round" stroke-linejoin="round" d="M15 12a3 3 0 1 1-6 0 3 3 0 0 1 6 0Z" />
+          </svg>
+          <%= document.unique_viewers %>
+        </div>
+
         <!-- Upvote/Downvote Buttons -->
         <% if current_user %>
           <% upvote_count = @document.votes_for.where(vote_scope: 'rating', vote_flag: true).count %>

db/migrate/20251017181945_create_viewed_items.rb

@@ -0,0 +1,20 @@
+class CreateViewedItems < ActiveRecord::Migration[7.2]
+  def change
+    create_table :viewed_items do |t|
+      t.references :user, null: false, foreign_key: true
+      t.references :viewable, polymorphic: true, null: false
+      t.datetime :viewed_at
+
+      t.timestamps
+    end
+
+    # Add composite index for efficient queries by user
+    add_index :viewed_items, %i[user_id viewed_at]
+
+    # Add composite index for efficient queries by viewable
+    add_index :viewed_items, %i[viewable_type viewable_id viewed_at]
+
+    # Add unique index to ensure one view record per user-viewable combination
+    add_index :viewed_items, %i[user_id viewable_type viewable_id], unique: true, name: 'index_viewed_items_on_user_and_viewable'
+  end
+end