Assignments working

app/controllers/commands_controller.rb

@@ -18,8 +18,16 @@ class CommandsController < ApplicationController
 
   private
     def parse_command(string)
-      Command::Parser.new(Current.user).parse(string).tap do |command|
+      Command::Parser.new(parsing_context).parse(string).tap do |command|
         Current.user.commands << command if command
       end
     end
+
+    def parsing_context
+      Command::Parser::Context.new(Current.user, url: request.referrer)
+    end
+
+    def card_ids_from_header
+      request.headers["X-Cards"].to_s.split(",").map(&:to_i) if request.headers["X-Card-Ids"]
+    end
 end

app/javascript/controllers/commands_controller.js

@@ -4,5 +4,4 @@ export default class extends Controller {
   static targets = [ "input" ]
 
   // Actions
-
 }

app/models/command/assign.rb

@@ -0,0 +1,36 @@
+class Command::Assign < Command
+  store_accessor :data, :card_ids, :assignee_ids
+
+  def execute
+    Rails.logger.info "*** #{assignees.collect(&:name)}"
+
+    transaction do
+      cards.each do |card|
+        assignees.each do |assignee|
+          card.toggle_assignment(assignee) unless card.assigned_to?(assignee)
+        end
+      end
+    end
+  end
+
+  def undo
+    raise "pending"
+  end
+
+  def description
+    raise "pending"
+  end
+
+  def to_command
+    raise "pending"
+  end
+
+  private
+    def assignees
+      User.where(id: assignee_ids)
+    end
+
+    def cards
+      user.accessible_cards.where(id: card_ids)
+    end
+end

app/models/command/go_to_card.rb

@@ -1,10 +1,6 @@
 class Command::GoToCard < Command
   store_accessor :data, :card_id
 
-  def card=(card)
-    self.card_id = card.id
-  end
-
   def execute
     redirect_to card
   end

app/models/command/parser.rb

@@ -1,15 +1,41 @@
 class Command::Parser
-  attr_reader :user
+  attr_reader :context
 
-  def initialize(user)
-    @user = user
+  delegate :user, :cards, to: :context
+
+  def initialize(context)
+    @context = context
   end
 
   def parse(string)
-    if card = user.accessible_cards.find_by_id(string)
-      Command::GoToCard.new(card: card)
-    else
-      Command::Search.new(query: string)
+    command_name, *command_arguments = string.split(" ")
+
+    case command_name
+      when "/assign", "/assign_to"
+        Command::Assign.new(assignee_ids: assignees_from(command_arguments).collect(&:id), card_ids: cards.ids)
+      else
+        search(string)
     end
   end
+
+  private
+    def search(string)
+      if card = user.accessible_cards.find_by_id(string)
+        Command::GoToCard.new(card_id: card.id)
+      else
+        Command::Search.new(query: string)
+      end
+    end
+
+    def assignees_from(strings)
+      Array(strings).filter_map do |string|
+        assignee_from(string)
+      end
+    end
+
+    # TODO: This is temporary as it can be ambiguous. We should inject the user ID in the command
+    #   instead, as determined by the user picker.
+    def assignee_from(string)
+      User.all.find { |user| user.mentionable_handles.include?(string) }
+    end
 end

app/models/command/parser/context.rb

@@ -0,0 +1,28 @@
+class Command::Parser::Context
+  attr_reader :user, :url
+
+  def initialize(user, url:)
+    @user = user
+    @url = url
+  end
+
+  def cards
+    route = Rails.application.routes.recognize_path(url)
+
+    controller = route[:controller]
+    action = route[:action]
+    params = route.except(:controller, :action)
+
+    cards_from(controller, action, params)
+  end
+
+  private
+    def cards_from(controller, action, params)
+      if controller == "cards" && action == "show"
+        user.accessible_cards.where id: params[:id]
+      elsif controller == "cards" && action == "index"
+        filter = user.filters.from_params params.reverse_merge(**FilterScoped::DEFAULT_PARAMS)
+        filter.cards
+      end
+    end
+end

app/views/cards/show.html.erb

@@ -29,7 +29,7 @@
   </nav>
 <% end %>
 
-<div data-controller="beacon" data-beacon-url-value="<%= card_reading_url(@card) %>">
+<div data-controller="beacon" data-card-id="<%= @card.id %>" data-beacon-url-value="<%= card_reading_url(@card) %>">
   <%= render "cards/container", card: @card %>
 
   <% if @card.published? %>