Generates interface- need to enable trim mode, save to disk.

lib/tasks/typescript.rake

@@ -0,0 +1,54 @@
+require 'rake'
+require 'erb'
+
+class Typescript
+  TYPE_MAPPING = {
+    "bigint"                      => "number",
+    "boolean"                     => "boolean",
+    "integer"                     => "number",
+    "timestamp without time zone" => "string"
+  }
+
+  INTERFACE_TPL = <<~END
+    /** THIS INTERFACE IS AUTO-GENERATED BY A SCRIPT.
+        DO NOT MANUALLY MODIFY, CHANGES WILL BE
+        OVERWRITTEN WHEN DATABASE SCHEMA CHANGES */
+
+    interface <%= interface_name %> {
+    <% fields.each  do |field| %>
+      <%= field.head %>: <%= field.tail %>;
+    <% end  %>
+    }
+  END
+
+  # CONFIG_KLASS = [ FbosConfig, WebAppConfig, FirmwareConfig ]
+
+  def self.generate(klass)
+    @klass  = klass
+    results = ERB.new(INTERFACE_TPL).result(binding)
+    puts results
+    # File.write()
+  end
+
+  def self.klass
+    @klass
+  end
+
+  def self.interface_name
+    @interface_name ||= klass.name
+  end
+
+  def self.fields
+    @fields ||= klass.columns.map do |col|
+      col_type = TYPE_MAPPING[col.sql_type_metadata.sql_type] or raise "NO!"
+      Pair[col.name, col_type]
+    end
+  end
+end
+
+namespace :typescript do
+  desc "This task does nothing"
+  task :interfaces => :environment do
+    Typescript.generate(WebAppConfig)
+  end
+end