feat: configurable distance display unit

app/views/settings/gtt/_general.html.erb

@@ -88,4 +88,31 @@
         min: 0, max: 15, step: 1) %>
     <em class="info"><%= l(:text_geojson_precision_info) %></em>
   </p>
+
+  <p>
+    <%= content_tag(:label, l(:label_distance_unit)) %>
+    <%= select_tag 'settings[distance_unit]',
+        options_for_select(
+          RedmineGtt::DistanceUnit::METERS_PER_UNIT.keys.map { |u|
+            [l(:"gtt_distance_unit_#{u}"), u]
+          },
+          RedmineGtt::DistanceUnit.current
+        ) %>
+    <em class="info"><%= l(:text_distance_unit_info) %></em>
+  </p>
+
+  <p>
+    <%= content_tag(:label, l(:label_api_distance_unit)) %>
+    <%# reserved: the API contract is meters-only for now; the setting
+        exists so a later version can offer more units without a
+        settings migration %>
+    <%= select_tag 'settings[api_distance_unit]',
+        options_for_select(
+          RedmineGtt::DistanceUnit::API_UNITS.map { |u|
+            [l(:"gtt_distance_unit_#{u}"), u]
+          },
+          RedmineGtt::DistanceUnit.api_unit
+        ) %>
+    <em class="info"><%= l(:text_api_distance_unit_info) %></em>
+  </p>
 </fieldset>

config/locales/de.yml

@@ -130,6 +130,15 @@ de:
   gtt_hide_map_for_invalid_geom_info: Bitte bearbeiten Sie die Anfrage und stellen
     Sie die Geometrie ein, um die Karte zu sehen.
   label_default_measure_enabled: Zeige Steuerung zum Messen von Länge und Fläche
+  label_distance_unit: "Anzeigeeinheit für Entfernungen"
+  text_distance_unit_info: "Einheit für angezeigte und eingegebene Entfernungen (Distanzfilter, Distanzspalte, Beobachtungsradius)."
+  label_api_distance_unit: "API-Entfernungseinheit"
+  text_api_distance_unit_info: "Die REST-API verwendet in dieser Version immer Meter."
+  gtt_distance_unit_m: "Meter (m)"
+  gtt_distance_unit_km: "Kilometer (km)"
+  gtt_distance_unit_ft: "Fuß (ft)"
+  gtt_distance_unit_mi: "Meilen (mi)"
+  gtt_distance_unit_nm: "Seemeilen (nm)"
   gtt_label_watch_nearby_legend: "Automatisch beobachten: Tickets in der Nähe"
   gtt_label_watch_nearby: "Neue Tickets in der Nähe meines Standorts beobachten"
   gtt_label_watch_nearby_radius: "Entfernung"

config/locales/en.yml

@@ -64,6 +64,15 @@ en:
   text_geojson_precision_info: "Decimal places for coordinates in GeoJSON output (EPSG:4326). 6 is about 0.11 m; lower values shrink the payload."
   gtt_hide_map_for_invalid_geom_info: "Please edit the issue and set the geometry
     to see the map."
+  label_distance_unit: "Distance display unit"
+  text_distance_unit_info: "Unit for distances shown and entered in the UI (distance filter, distance column, watch radius)."
+  label_api_distance_unit: "API distance unit"
+  text_api_distance_unit_info: "The REST API always uses meters in this version."
+  gtt_distance_unit_m: "Meters (m)"
+  gtt_distance_unit_km: "Kilometers (km)"
+  gtt_distance_unit_ft: "Feet (ft)"
+  gtt_distance_unit_mi: "Miles (mi)"
+  gtt_distance_unit_nm: "Nautical miles (nm)"
 
   gtt_label_watch_nearby_legend: "Auto watch: nearby issues"
   gtt_label_watch_nearby: "Watch new issues near my location"

config/locales/ja.yml

@@ -61,6 +61,15 @@ ja:
   label_geojson_precision: "GeoJSON座標の小数点桁数"
   text_geojson_precision_info: "GeoJSON出力（EPSG:4326）の座標の小数点以下の桁数。6桁で約0.11m。小さくするとデータ量を削減できます。"
   gtt_hide_map_for_invalid_geom_info: "地図を見るにはチケットを編集して位置情報を登録してください。"
+  label_distance_unit: "距離の表示単位"
+  text_distance_unit_info: "画面で表示・入力する距離の単位（距離フィルタ、距離カラム、ウォッチ半径）。"
+  label_api_distance_unit: "APIの距離単位"
+  text_api_distance_unit_info: "このバージョンではREST APIは常にメートルを使用します。"
+  gtt_distance_unit_m: "メートル (m)"
+  gtt_distance_unit_km: "キロメートル (km)"
+  gtt_distance_unit_ft: "フィート (ft)"
+  gtt_distance_unit_mi: "マイル (mi)"
+  gtt_distance_unit_nm: "海里 (nm)"
 
   gtt_label_watch_nearby_legend: "自動ウォッチ: 近くのチケット"
   gtt_label_watch_nearby: "登録した所在地の近くの新しいチケットをウォッチする"

init.rb

@@ -45,7 +45,9 @@
       'hide_map_for_invalid_geom' => false,
       # Keep in sync with RedmineGtt::DEFAULT_GEOJSON_PRECISION (literal here to
       # avoid autoloading the module during plugin registration).
-      'geojson_precision' => 6
+      'geojson_precision' => 6,
+      'distance_unit' => 'm',
+      'api_distance_unit' => 'm'
     },
     partial: 'settings/gtt/settings'
   )

lib/redmine_gtt.rb

@@ -53,6 +53,7 @@ def self.setup_controller_patches
     RedmineGtt::Patches::ProjectsControllerPatch.apply
     RedmineGtt::Patches::UsersControllerPatch.apply
     RedmineGtt::Patches::IssuesHelperPatch.apply
+    RedmineGtt::Patches::QueriesHelperPatch.apply
 
     [
       IssuesController,

lib/redmine_gtt/distance_unit.rb

@@ -0,0 +1,48 @@
+# frozen_string_literal: true
+
+module RedmineGtt
+  # Converts between meters and the display unit configured in the plugin
+  # settings (#10). Meters are the internal unit everywhere: storage, SQL,
+  # the filter wire format and the REST API all stay metric; only what the
+  # user sees and types is converted.
+  module DistanceUnit
+
+    METERS_PER_UNIT = {
+      'm'  => 1.0,
+      'km' => 1000.0,
+      'ft' => 0.3048,
+      'mi' => 1609.344,
+      'nm' => 1852.0
+    }.freeze
+
+    DEFAULT = 'm'
+
+    # Units the REST API may use. Reserved for future flexibility: the API
+    # contract is meters and only meters for now, but the setting exists so
+    # a later version can widen this list without a settings migration.
+    API_UNITS = %w(m).freeze
+
+    # The configured display unit, falling back to meters for anything
+    # unknown (empty setting, typo from a manually edited setting hash).
+    def self.current
+      unit = Setting.plugin_redmine_gtt['distance_unit'].to_s
+      METERS_PER_UNIT.key?(unit) ? unit : DEFAULT
+    end
+
+    # The unit used by the REST API. Clamped to meters regardless of the
+    # stored value while API_UNITS has a single entry.
+    def self.api_unit
+      unit = Setting.plugin_redmine_gtt['api_distance_unit'].to_s
+      API_UNITS.include?(unit) ? unit : DEFAULT
+    end
+
+    def self.from_meters(meters, unit = current)
+      meters.to_f / METERS_PER_UNIT.fetch(unit)
+    end
+
+    def self.to_meters(value, unit = current)
+      value.to_f * METERS_PER_UNIT.fetch(unit)
+    end
+
+  end
+end

lib/redmine_gtt/patches/issue_query_patch.rb

@@ -43,7 +43,8 @@ def available_columns
               caption: :field_geom
             )
             columns << QueryColumn.new(:distance,
-              caption: :label_gtt_distance,
+              # header shows the configured display unit, e.g. "Distance (km)"
+              caption: -> { "#{l(:label_gtt_distance)} (#{DistanceUnit.current})" },
               sortable: lambda{
                 lng, lat = find_center_point
                 distance_query lng, lat

lib/redmine_gtt/patches/queries_helper_patch.rb

@@ -0,0 +1,38 @@
+module RedmineGtt
+  module Patches
+
+    # Renders the distance column in the configured display unit (#10).
+    # The underlying value stays meters (it is what the query selects and
+    # what the REST API returns); only the rendered list/CSV cell converts.
+    module QueriesHelperPatch
+
+      def self.apply
+        QueriesHelper.prepend self unless QueriesHelper < self
+      end
+
+      def column_value(column, item, value)
+        if column.name == :distance && value.present?
+          gtt_format_distance(value)
+        else
+          super
+        end
+      end
+
+      def csv_value(column, object, value)
+        if column.name == :distance && value.present?
+          # mirror core's CSV float formatting incl. the decimal separator
+          gtt_format_distance(value).gsub('.', l(:general_csv_decimal_separator))
+        else
+          super
+        end
+      end
+
+      private
+
+      def gtt_format_distance(meters)
+        sprintf('%.2f', RedmineGtt::DistanceUnit.from_meters(meters))
+      end
+
+    end
+  end
+end

test/unit/distance_unit_test.rb

@@ -0,0 +1,67 @@
+require_relative '../test_helper'
+
+class DistanceUnitTest < GttTest
+
+  teardown do
+    Setting.plugin_redmine_gtt = Setting.plugin_redmine_gtt.merge(
+      'distance_unit' => 'm', 'api_distance_unit' => 'm'
+    )
+  end
+
+  test 'defaults to meters' do
+    assert_equal 'm', RedmineGtt::DistanceUnit.current
+    assert_equal 'm', RedmineGtt::DistanceUnit.api_unit
+  end
+
+  test 'falls back to meters for unknown units' do
+    Setting.plugin_redmine_gtt = Setting.plugin_redmine_gtt.merge(
+      'distance_unit' => 'parsec'
+    )
+    assert_equal 'm', RedmineGtt::DistanceUnit.current
+  end
+
+  test 'reads the configured display unit' do
+    Setting.plugin_redmine_gtt = Setting.plugin_redmine_gtt.merge(
+      'distance_unit' => 'km'
+    )
+    assert_equal 'km', RedmineGtt::DistanceUnit.current
+  end
+
+  test 'api unit is clamped to meters regardless of the stored value' do
+    Setting.plugin_redmine_gtt = Setting.plugin_redmine_gtt.merge(
+      'api_distance_unit' => 'km'
+    )
+    assert_equal 'm', RedmineGtt::DistanceUnit.api_unit
+  end
+
+  test 'converts from meters into the given unit' do
+    assert_equal 1.5, RedmineGtt::DistanceUnit.from_meters(1500, 'km')
+    assert_in_delta 0.932, RedmineGtt::DistanceUnit.from_meters(1500, 'mi'), 0.001
+    assert_in_delta 4921.26, RedmineGtt::DistanceUnit.from_meters(1500, 'ft'), 0.01
+    assert_in_delta 0.81, RedmineGtt::DistanceUnit.from_meters(1500, 'nm'), 0.001
+    assert_equal 1500.0, RedmineGtt::DistanceUnit.from_meters(1500, 'm')
+  end
+
+  test 'converts a unit value into meters' do
+    assert_equal 1500.0, RedmineGtt::DistanceUnit.to_meters(1.5, 'km')
+    assert_in_delta 1609.344, RedmineGtt::DistanceUnit.to_meters(1, 'mi'), 0.001
+    assert_equal 25.0, RedmineGtt::DistanceUnit.to_meters(25, 'm')
+  end
+
+  test 'conversions honor the configured unit by default' do
+    Setting.plugin_redmine_gtt = Setting.plugin_redmine_gtt.merge(
+      'distance_unit' => 'km'
+    )
+    assert_equal 2.0, RedmineGtt::DistanceUnit.from_meters(2000)
+    assert_equal 2000.0, RedmineGtt::DistanceUnit.to_meters(2)
+  end
+
+  test 'distance column caption carries the unit' do
+    Setting.plugin_redmine_gtt = Setting.plugin_redmine_gtt.merge(
+      'distance_unit' => 'mi'
+    )
+    column = IssueQuery.new.available_columns.detect { |c| c.name == :distance }
+    assert column, 'distance column should be available on global queries'
+    assert_match(/\(mi\)\z/, column.caption)
+  end
+end

test/unit/queries_helper_patch_test.rb

@@ -0,0 +1,39 @@
+require_relative '../test_helper'
+
+class QueriesHelperPatchTest < Redmine::HelperTest
+  include QueriesHelper
+  include ApplicationHelper
+  include ERB::Util
+
+  teardown do
+    Setting.plugin_redmine_gtt = Setting.plugin_redmine_gtt.merge(
+      'distance_unit' => 'm'
+    )
+  end
+
+  def distance_column
+    IssueQuery.new.available_columns.detect { |c| c.name == :distance }
+  end
+
+  test 'renders the distance column in the configured unit' do
+    Setting.plugin_redmine_gtt = Setting.plugin_redmine_gtt.merge(
+      'distance_unit' => 'km'
+    )
+    assert_equal '1.50', column_value(distance_column, nil, 1500.0)
+  end
+
+  test 'renders meters by default' do
+    assert_equal '1500.00', column_value(distance_column, nil, 1500.0)
+  end
+
+  test 'renders the csv value with the locale decimal separator' do
+    Setting.plugin_redmine_gtt = Setting.plugin_redmine_gtt.merge(
+      'distance_unit' => 'km'
+    )
+    assert_equal '1.50', csv_value(distance_column, nil, 1500.0)
+  end
+
+  test 'leaves blank distance values to core' do
+    assert_equal '', column_value(distance_column, nil, nil).to_s
+  end
+end