From 305cacb0f4022b79ed6a5d95fded40ebb704c1ee Mon Sep 17 00:00:00 2001
From: Rick Carlino <rick.carlino@gmail.com>
Date: Thu, 22 Mar 2018 15:39:52 -0500
Subject: [PATCH 1/3] Possible solution for in_use flag. Needs tests

---
 app/lib/celery_script/fetch_celery.rb | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/app/lib/celery_script/fetch_celery.rb b/app/lib/celery_script/fetch_celery.rb
index c7ca4adf5..33608475e 100644
--- a/app/lib/celery_script/fetch_celery.rb
+++ b/app/lib/celery_script/fetch_celery.rb
@@ -110,6 +110,10 @@ module CeleryScript
 
     def execute
       canonical_form = misc_fields.merge!(recurse_into_node(entry_node))
+      canonical_form[:in_use] = \
+        EdgeNode.where(kind: "sequence_id", value: sequence.id).exists? ||
+        RegimenItem.where(sequence_id: sequence.id).exists? ||
+        FarmEvent.where(executable: sequence).exists?
       return HashWithIndifferentAccess.new(canonical_form)
     end
   end

From a1b19d579d885b50b62e225aa82ddc81ce9cd952 Mon Sep 17 00:00:00 2001
From: Rick Carlino <rick.carlino@gmail.com>
Date: Fri, 23 Mar 2018 09:49:44 -0500
Subject: [PATCH 2/3] Tests for the in_use flag

---
 spec/factories/farm_event.rb                  |  4 +--
 .../flat_ir_stuff/fetch_celery_spec.rb        | 32 +++++++++++++++++++
 2 files changed, 34 insertions(+), 2 deletions(-)

diff --git a/spec/factories/farm_event.rb b/spec/factories/farm_event.rb
index 9ba561129..88ca9adce 100644
--- a/spec/factories/farm_event.rb
+++ b/spec/factories/farm_event.rb
@@ -1,8 +1,8 @@
 FactoryBot.define do
   factory :farm_event do
     start_time { Date.yesterday - [*(1..5)].sample.days }
-    end_time { Date.today + 1.minute + ([*(1..5)].sample).days }
-    time_unit { FarmEvent::UNITS_OF_TIME.sample }
+    end_time   { Date.today + 1.minute + ([*(1..5)].sample).days }
+    time_unit  { FarmEvent::UNITS_OF_TIME.sample }
     repeat { [*(1..5)].sample }
     # device
     after(:build) do |s|
diff --git a/spec/mutations/flat_ir_stuff/fetch_celery_spec.rb b/spec/mutations/flat_ir_stuff/fetch_celery_spec.rb
index 99afdaa62..231747755 100644
--- a/spec/mutations/flat_ir_stuff/fetch_celery_spec.rb
+++ b/spec/mutations/flat_ir_stuff/fetch_celery_spec.rb
@@ -5,6 +5,38 @@ describe CeleryScript::FetchCelery do
   let(:user) { FactoryBot.create(:user) }
   let(:device) { user.device }
 
+  it "marks in_use as false when not in use" do
+    in_use = \
+      CeleryScript::FetchCelery.run!(sequence: FakeSequence.create())[:in_use]
+    expect(in_use).to be(false)
+  end
+
+  it "marks a sequence as in_use by Regimen" do
+    sequence = FakeSequence.create()
+    ri       = RegimenItem.new(time_offset: 100, sequence_id: sequence.id)
+    regimen  = FactoryBot.create(:regimen, regimen_items: [ri])
+    results  = CeleryScript::FetchCelery.run!(sequence: sequence)
+
+    expect(results[:in_use]).to be(true)
+  end
+
+  it "marks a sequence as in_use by FarmEvent" do
+    fe       = FactoryBot.create(:farm_event)
+    sequence = fe.executable
+    results  = CeleryScript::FetchCelery.run!(sequence: sequence)
+
+    expect(results[:in_use]).to be(true)
+  end
+
+  it "marks a sequence as in_use by Sequence" do
+    sequence = FakeSequence.create()
+    user     = FakeSequence.create(body: [
+      { kind: "execute", args: { sequence_id: sequence.id } }
+    ])
+    results  = CeleryScript::FetchCelery.run!(sequence: sequence)
+    expect(results[:in_use]).to be(true)
+  end
+
   __NOTHING______ = "nothing"
 
   it "Makes JSON that is identical to the legacy implementation - part 1" do

From 0f752c8810f44f5ef4d64bb0ebd7e826a33ae0ff Mon Sep 17 00:00:00 2001
From: Rick Carlino <rick.carlino@gmail.com>
Date: Fri, 23 Mar 2018 09:51:31 -0500
Subject: [PATCH 3/3] Update FE interfaces

---
 webpack/sequences/interfaces.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/webpack/sequences/interfaces.ts b/webpack/sequences/interfaces.ts
index f595aa9f5..4a544952e 100644
--- a/webpack/sequences/interfaces.ts
+++ b/webpack/sequences/interfaces.ts
@@ -57,6 +57,7 @@ export interface Sequence extends CeleryScriptSequence {
   id?: number;
   color: Color;
   name: string;
+  in_use?: boolean;
 }
 
 export interface SequenceReducerState {