Initial split transaction support (#1230)

* Initial split transaction support

* Add support to unsplit and edit split

* Update show.html.erb

* FIX address reviews

* Improve UX

* Update show.html.erb

* Reviews

* Update edit.html.erb

* Add parent category to dialog

* Update en.yml

* Add UI indication to totals

* FIX ui update

* Add category select like rest of app

---------

Signed-off-by: Juan José Mata <juanjo.mata@gmail.com>
Co-authored-by: Juan José Mata <juanjo.mata@gmail.com>

app/controllers/splits_controller.rb

@@ -0,0 +1,95 @@
+class SplitsController < ApplicationController
+  before_action :set_entry
+
+  def new
+    @categories = Current.family.categories.alphabetically
+  end
+
+  def create
+    unless @entry.transaction.splittable?
+      redirect_back_or_to transactions_path, alert: t("splits.create.not_splittable")
+      return
+    end
+
+    raw_splits = split_params[:splits]
+    raw_splits = raw_splits.values if raw_splits.respond_to?(:values)
+
+    splits = raw_splits.map do |s|
+      { name: s[:name], amount: s[:amount].to_d * -1, category_id: s[:category_id].presence }
+    end
+
+    @entry.split!(splits)
+    @entry.sync_account_later
+
+    redirect_back_or_to transactions_path, notice: t("splits.create.success")
+  rescue ActiveRecord::RecordInvalid => e
+    redirect_back_or_to transactions_path, alert: e.message
+  end
+
+  def edit
+    resolve_to_parent!
+
+    unless @entry.split_parent?
+      redirect_to transactions_path, alert: t("splits.edit.not_split")
+      return
+    end
+
+    @categories = Current.family.categories.alphabetically
+    @children = @entry.child_entries.includes(:entryable)
+  end
+
+  def update
+    resolve_to_parent!
+
+    unless @entry.split_parent?
+      redirect_to transactions_path, alert: t("splits.edit.not_split")
+      return
+    end
+
+    raw_splits = split_params[:splits]
+    raw_splits = raw_splits.values if raw_splits.respond_to?(:values)
+
+    splits = raw_splits.map do |s|
+      { name: s[:name], amount: s[:amount].to_d * -1, category_id: s[:category_id].presence }
+    end
+
+    Entry.transaction do
+      @entry.unsplit!
+      @entry.split!(splits)
+    end
+
+    @entry.sync_account_later
+
+    redirect_to transactions_path, notice: t("splits.update.success")
+  rescue ActiveRecord::RecordInvalid => e
+    redirect_to transactions_path, alert: e.message
+  end
+
+  def destroy
+    resolve_to_parent!
+
+    unless @entry.split_parent?
+      redirect_to transactions_path, alert: t("splits.edit.not_split")
+      return
+    end
+
+    @entry.unsplit!
+    @entry.sync_account_later
+
+    redirect_to transactions_path, notice: t("splits.destroy.success")
+  end
+
+  private
+
+    def set_entry
+      @entry = Current.family.entries.find(params[:transaction_id])
+    end
+
+    def resolve_to_parent!
+      @entry = @entry.parent_entry if @entry.split_child?
+    end
+
+    def split_params
+      params.require(:split).permit(splits: [ :name, :amount, :category_id ])
+    end
+end