Add Detections model

This includes the database migration, but not an admin dashboard.

Implementing scopes and constraints

app.json

@@ -5,6 +5,9 @@
     "postdeploy": "bundle exec rails db:seed"
   },
   "env": {
+    "DETECTOR_VERSION": {
+      "required": false
+    },
     "LINKRESOLVER_BASEURL": {
       "required": false
     },

app/models/detection.rb

@@ -0,0 +1,36 @@
+# frozen_string_literal: true
+
+# == Schema Information
+#
+# Table name: detections
+#
+#  id               :integer          not null, primary key
+#  term_id          :integer          not null
+#  detector_id      :integer          not null
+#  detector_version :string
+#  created_at       :datetime         not null
+#  updated_at       :datetime         not null
+#
+class Detection < ApplicationRecord
+  belongs_to :term
+  belongs_to :detector
+
+  before_create :set_defaults, :check_for_current
+
+  scope :current, -> { where(detector_version: ENV['DETECTOR_VERSION']) }
+  scope :for_detector, -> (detector) { where(detector_id: detector.id) }
+  scope :for_term, -> (term) { where(term_id: term.id) }
+
+  private
+
+  def check_for_current
+    if Detection.for_term(self.term).for_detector(self.detector).current.exists?
+      errors.add(:detector_version, "already exists")
+      throw(:abort)
+    end
+  end
+
+  def set_defaults
+    self.detector_version = ENV['DETECTOR_VERSION'] || 'unset'
+  end
+end

app/models/detector.rb

@@ -12,4 +12,5 @@
 class Detector < ApplicationRecord
   has_many :detector_categories, dependent: :destroy
   has_many :categories, through: :detector_categories
+  has_many :detections, dependent: :destroy
 end

app/models/term.rb

@@ -11,4 +11,42 @@
 #
 class Term < ApplicationRecord
   has_many :search_events, dependent: :destroy
+  has_many :detections, dependent: :destroy
+
+  def record_detections
+    record_patterns
+    record_journals
+    record_suggested_resources
+  end
+
+  def record_patterns
+    si = Detector::StandardIdentifiers.new(phrase)
+
+    si.identifiers.each_key do |k|
+      Detection.create(
+        term: self,
+        detector: Detector.where("name = '#{k.to_s.upcase}'").first
+      )
+    end
+  end
+
+  def record_journals
+    result = Detector::Journal.full_term_match(phrase)
+    if result.any?
+      Detection.create(
+        term: self,
+        detector: Detector.where("name = 'Journal'").first
+      )
+    end
+  end
+
+  def record_suggested_resources
+    result = Detector::SuggestedResource.full_term_match(phrase)
+    if result.any?
+      Detection.create(
+        term: self,
+        detector: Detector.where("name = 'SuggestedResource'").first
+      )
+    end
+  end
 end

db/migrate/20240917160025_create_detections.rb

@@ -0,0 +1,13 @@
+class CreateDetections < ActiveRecord::Migration[7.1]
+  def change
+    create_table :detections do |t|
+      t.belongs_to :term, null: false, foreign_key: true
+      t.belongs_to :detector, null: false, foreign_key: true
+      t.string :detector_version
+
+      t.timestamps
+    end
+    add_index :detections, [:term_id, :detector_id, :detector_version], unique: true
+    add_index :detections, [:detector_id, :term_id, :detector_version], unique: true
+  end
+end