Add work hours calc

src/dayoff.cr

@@ -10,20 +10,44 @@ module Dayoff
     )
   end
 
+  class WorkRecord
+    JSON.mapping(
+      start: String,
+      finish: String,
+    )
+  end
+
   class App
-    def initialize(pddates_path)
-      content = File.open(pddates_path) do |file|
+    def initialize(pdates_path, wdates_path)
+      content = File.open(pdates_path) do |file|
         file.gets_to_end
       end
       @pdates = Array(PlannedDate).from_json(content)
+
+      content = File.open(wdates_path) do |file|
+        file.gets_to_end
+      end
+      @wrecords = Array(WorkRecord).from_json(content)
     end
 
-    def get_work_hours
+    def get_planned_hours
       sum = 0
       @pdates.each do |wd|
         sum += wd.hours
       end
       sum
     end
+
+    def get_work_hours
+      sum = 0
+      location = Time::Location.load("Europe/Moscow")
+      @wrecords.each do |wr|
+        s = Time.parse(wr.start, "%Y-%m-%d %H:%M:%S", location)
+        f = Time.parse(wr.finish, "%Y-%m-%d %H:%M:%S", location)
+        diff = f - s
+        sum += diff.total_hours.to_i32
+      end
+      return sum
+    end
   end
 end