diff --git a/app/models/branch.rb b/app/models/branch.rb
index 976ab852..577e6b26 100644
--- a/app/models/branch.rb
+++ b/app/models/branch.rb
@@ -99,4 +99,37 @@ def fq_branch_name
   def git_service
     GitService::Branch.new(self)
   end
+
+  # Branch Failure
+
+  def notify_of_failure
+    if passing?
+      BuildFailureNotifier.new(self).report_passing
+      update(:last_build_failure_notified_at => nil, :travis_build_failure_id => nil)
+    elsif should_notify_of_failure?
+      update(:last_build_failure_notified_at => Time.zone.now)
+
+      BuildFailureNotifier.new(self).post_failure
+    end
+  end
+
+  def previously_failing?
+    !!travis_build_failure_id
+  end
+
+  def should_notify_of_failure?
+    last_build_failure_notified_at.nil? || last_build_failure_notified_at < 1.day.ago
+  end
+
+  # If we have reported a failure before and the branch is now green.
+  #
+  # The other advantage of checking `last_build_failure_notified_at.nil?` here
+  # is that we save a Travis API call, since we shouldn't be creating
+  # BuildFailure records without having found a build failure elsewhere (e.g.
+  # TravisBranchMonitor).
+  #
+  # New records will short circut before hitting `Travis::Repository.find`.
+  def passing?
+    !last_build_failure_notified_at.nil? && Travis::Repository.find(repo.name).branch(name).green?
+  end
 end
diff --git a/db/migrate/20200109223351_add_branch_build_failures.rb b/db/migrate/20200109223351_add_branch_build_failures.rb
new file mode 100644
index 00000000..1d1d5927
--- /dev/null
+++ b/db/migrate/20200109223351_add_branch_build_failures.rb
@@ -0,0 +1,6 @@
+class AddBranchBuildFailures < ActiveRecord::Migration[5.2]
+  def change
+    add_column :branches, :travis_build_failure_id, :integer
+    add_column :branches, :last_build_failure_notified_at, :datetime
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 1294151d..78ae5a11 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2017_10_06_050814) do
+ActiveRecord::Schema.define(version: 2020_01_09_223351) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -44,6 +44,8 @@
     t.string "merge_target"
     t.string "pr_title"
     t.integer "linter_offense_count"
+    t.integer "travis_build_failure_id"
+    t.datetime "last_build_failure_notified_at"
     t.index ["repo_id"], name: "index_branches_on_repo_id"
   end