#434

backend/app/services/counts_resource_definition.rb

@@ -2,6 +2,10 @@
 class CountsResourceDefinition
   # Compatibility belongs at the request boundary, not in field definitions.
   def self.normalise_params(params)
+    aliases = nil
+    predicates = nil
+    scope = params['name_scope']
+    raise ArgumentError if scope && !['locale', 'language'].include?(scope)
     params.each_with_object({}) do |(key, value), result|
       result[key] = value
       next unless value.is_a?(String)
@@ -14,6 +18,16 @@ class CountsResourceDefinition
           value == 'is_latest')
         result[key] = 'latest'
       end
+      if (['columns', 'children', 'order', 'sort', 'child_sort'].include?(key) &&
+          value.match?(/(?:name|aliases)_[a-z]+_[a-z0-9_]+/))
+        aliases ||= new('tags').column_aliases.to_h { [_1[:key], _1[:value]] }
+        result[key] = result[key].gsub(/(?:name|aliases)_[a-z0-9_]+/) { aliases.fetch(_1, _1) }
+      end
+      if (scope != 'language' && key.match?(/\Aconditions\.[0-9]+\.field\z/) &&
+          value.match?(/(?:name|aliases)_[a-z0-9_]+/))
+        predicates ||= new('tags').condition_aliases.to_h { [_1[:key], _1[:value]] }
+        result[key] = value.gsub(/(?:name|aliases)_[a-z0-9_]+/) { predicates.fetch(_1, _1) }
+      end
     end
   end
 
@@ -116,12 +130,8 @@ class CountsResourceDefinition
 
   def name_columns
     @name_columns ||= begin
-      locales = Locale.joins(:language)
-          .select('locales.code', 'locales.language_code', 'locales.script_code')
-          .order('languages.created_at ASC', 'languages.code ASC', 'locales.code ASC')
-      codes = locales.map do |locale|
-        { code: locale.code, language_code: locale.language_code,
-          script_code: locale.script_code }
+      codes = Language.select(:code).order(:created_at, :code).map do |language|
+        { code: language.code, language_code: language.code }
       end
       names = codes.map do |locale|
         { key: self.class.name_key(locale[:code]), label: 'counts:localeName',
@@ -135,7 +145,45 @@ class CountsResourceDefinition
     end
   end
 
-  def name_column(key) = name_columns.find { _1[:key] == key }
+  # Old locale-qualified predicates keep their script restriction at the input boundary.
+  def legacy_name_columns
+    @legacy_name_columns ||= Locale.select(:code, :language_code, :script_code)
+        .order(:code).flat_map do |locale|
+      codes = { code: locale.code, language_code: locale.language_code,
+                script_code: locale.script_code }
+      code = locale.code == locale.language_code ? "#{ locale.code }_#{ locale.script_code }" :
+          locale.code
+      [{ key: self.class.name_key(code), label: 'counts:localeName',
+         name_locale: codes, legacy: true },
+       { key: self.class.aliases_key(code), label: 'counts:localeAliases',
+         name_locale: codes, multiple_values: true, legacy: true }]
+    end
+  end
+
+  def column_aliases
+    legacy_name_columns.map do |field|
+      language = field[:name_locale][:language_code]
+      value = if field[:multiple_values]
+                self.class.aliases_key(language)
+              else self.class.name_key(language)
+              end
+      { key: field[:key], value: }
+    end
+  end
+
+  def condition_aliases
+    legacy_name_columns.filter_map do |field|
+      code = field[:name_locale][:code]
+      key = field[:multiple_values] ? self.class.aliases_key(code) : self.class.name_key(code)
+      next if key == field[:key]
+
+      { key:, value: field[:key] }
+    end
+  end
+
+  def name_column(key)
+    name_columns.find { _1[:key] == key } || legacy_name_columns.find { _1[:key] == key }
+  end
 
   def name_expression(key, row = 'v')
     if key.start_with?('aliases_')
@@ -148,21 +196,26 @@ class CountsResourceDefinition
     locale = name_column(key).fetch(:name_locale)
     connection = model.connection
     path = connection.quote("$.#{ locale[:language_code].to_json }")
+    value = "JSON_UNQUOTE(NULLIF(JSON_EXTRACT(#{ row }.names, " +
+        "CONCAT(#{ path }, '.name')), CAST('null' AS JSON)))"
+    return value unless locale[:script_code]
+
     script = connection.quote(locale[:script_code])
     "CASE WHEN LOWER(JSON_UNQUOTE(JSON_EXTRACT(#{ row }.names, " +
         "CONCAT(#{ path }, '.script_code')))) = LOWER(#{ script }) " +
-        "THEN JSON_UNQUOTE(NULLIF(JSON_EXTRACT(#{ row }.names, " +
-        "CONCAT(#{ path }, '.name')), CAST('null' AS JSON))) END"
+        "THEN #{ value } END"
   end
 
   def alias_source(key, row = 'v')
     locale = name_column(key).fetch(:name_locale)
     connection = model.connection
     path = connection.quote("$.#{ locale[:language_code].to_json }.aliases[*]")
-    script = connection.quote(locale[:script_code])
     source = "JSON_TABLE(COALESCE(#{ row }.names, JSON_OBJECT()), #{ path } " +
         "COLUMNS (ordinal FOR ORDINALITY, name TEXT PATH '$.name', " +
         "script TEXT PATH '$.script_code')) locale_alias"
+    return [source, 'locale_alias.name'] unless locale[:script_code]
+
+    script = connection.quote(locale[:script_code])
     value = "CASE WHEN LOWER(locale_alias.script) = LOWER(#{ script }) " +
         'THEN locale_alias.name END'
     [source, value]
@@ -231,11 +284,11 @@ class CountsResourceDefinition
       fields = fields.map do |field|
         next field unless field[:key] == 'parents'
 
-        field.merge(children: field[:children] + [
+        field.merge(children: field[:children] + legacy_name_columns + [
             { key: 'name', label: 'history:name' },
             { key: 'names', label: 'counts:columns.names', children: child_fields('names') }])
       end
-      fields += [{ key: 'name', label: 'counts:columns.name' },
+      fields += legacy_name_columns + [{ key: 'name', label: 'counts:columns.name' },
           { key: 'names', label: 'counts:columns.names', children: child_fields('names') },
           { key: 'aliases', label: 'tags:aliases', children: child_fields('aliases') }]
     end
@@ -243,7 +296,7 @@ class CountsResourceDefinition
       fields = fields.map do |field|
         next field unless field[:key] == 'tags'
 
-        field.merge(children: field[:children] + [
+        field.merge(children: field[:children] + legacy_name_columns + [
             { key: 'name', label: 'history:name' },
             { key: 'names', label: 'counts:columns.names', children: child_fields('names') },
             { key: 'aliases', label: 'tags:aliases', children: child_fields('aliases') }])