Character items and inventory, with ability to add and remove items

6 files changed, 82 insertions, 7 deletions

diff --git a/app/controllers/characters/items_controller.rb b/app/controllers/characters/items_controller.rb
new file mode 100644
index 0000000..e1a30f8
--- /dev/null
+++ b/app/controllers/characters/items_controller.rb
@@ -0,0 +1,5 @@
+class Characters::ItemsController < ApplicationController
+  def index
+    @character_items = Character.find(params[:character_id]).character_items
+  end
+end
diff --git a/app/errors/item_quantity_error.rb b/app/errors/item_quantity_error.rb
new file mode 100644
index 0000000..29576ca
--- /dev/null
+++ b/app/errors/item_quantity_error.rb
@@ -0,0 +1,2 @@
+class ItemQuantityError < StandardError
+end
diff --git a/app/models/character.rb b/app/models/character.rb
index 1c022ea..a158d88 100644
--- a/app/models/character.rb
+++ b/app/models/character.rb
@@ -1,5 +1,15 @@
 class Character < ApplicationRecord
   belongs_to :user
   belongs_to :activity, optional: true
+  has_many :character_items
+  has_many :items, through: :character_items
   validates :name, presence: true
+
+  def shift_item(gid, amount)
+    CharacterItem.transaction do
+      item = self.character_items.find_or_initialize_by(item: Item.find_by_gid(gid))
+      item.increment(:quantity, amount)
+      item.save
+    end
+  end
 end
diff --git a/app/models/character_item.rb b/app/models/character_item.rb
new file mode 100644
index 0000000..b54f799
--- /dev/null
+++ b/app/models/character_item.rb
@@ -0,0 +1,25 @@
+class CharacterItem < ApplicationRecord
+  belongs_to :character
+  belongs_to :item
+  validates :quantity, presence: true
+
+  after_initialize do
+    if self.new_record?
+      self.quantity ||= 0
+    end
+  end
+
+  after_save :destroy_if_zero_quantity
+
+  scope :ordered_by_item_name, -> { includes(:item).order("items.name") }
+
+  private
+    def destroy_if_zero_quantity
+      if self.quantity == 0
+        destroy
+      elsif self.quantity < 0
+        # TODO: Can improve this (at the least, with reporting, later).
+        raise ItemQuantityError
+      end
+    end
+end
diff --git a/app/views/application/_navbar.html.erb b/app/views/application/_navbar.html.erb
index 5d3a2cb..85f4642 100644
--- a/app/views/application/_navbar.html.erb
+++ b/app/views/application/_navbar.html.erb
@@ -1,16 +1,13 @@
 <ul class="py-2 px-2 col-span-12 text-display">
-  <% if user_signed_in? %> <%# Will replace this with `current_character` or equivalent, eventually %>
+  <% if current_char %>
     <li class="mr-6 inline">
-      LinkA
+      Actions
     </li>
     <li class="mr-6 inline">
-      LinkB
+      <%= link_to "Character", character_path(current_char) %>
     </li>
     <li class="mr-6 inline">
-      LinkC
-    </li>
-    <li class="mr-6 inline">
-      LinkD
+      <%= link_to "Inventory", character_items_path(current_char) %>
     </li>
   <% end %>
 </ul>
diff --git a/app/views/characters/items/index.html.erb b/app/views/characters/items/index.html.erb
new file mode 100644
index 0000000..e313f7e
--- /dev/null
+++ b/app/views/characters/items/index.html.erb
@@ -0,0 +1,36 @@
+<h1 class="text-xl">Inventory</h1>
+
+<table class="table-auto">
+  <thead>
+  <tr>
+    <th class="table-header-padded">Amount</th>
+    <th class="table-header-padded">Item</th>
+    <th class="table-header-padded">Equip</th>
+    <th class="table-header-padded">Use</th>
+    <th class="table-header-padded">Destroy</th>
+  </tr>
+  </thead>
+  <tbody>
+  <% @character_items.ordered_by_item_name.each do |ci| %>
+    <tr>
+      <td class="table-cell-padded text-right"><%= ci.quantity %></td>
+      <td class="table-cell-padded"><%= ci.item.name %></td>
+      <td class="table-cell-padded">
+        <% if ci.item.equip_slot %>
+          <%= link_to "[Equip]", "#" %>
+        <% end %>
+      </td>
+      <td class="table-cell-padded">
+        <% if ci.item.usable? %>
+          <%= link_to "[Use]", "#" %>
+        <% end %>
+      </td>
+      <td class="table-cell-padded">
+        <%= link_to "[Destroy]", "#" %>
+        <%= link_to "[Destroy All]", "#" %>
+      </td>
+    </tr>
+  <% end %>
+  </tbody>
+</table>
+