Add file storage

spec/profile_spec.cr

@@ -3,16 +3,6 @@ require "./spec_helper"
 module Dayoff::Test
   extend self
 
-  def d(day)
-    location = Time::Location.load("Europe/Moscow")
-    Time.local(2019, 1, day, location: location)
-  end
-
-  def t(day, hour, min = 0)
-    location = Time::Location.load("Europe/Moscow")
-    Time.local(2019, 1, day, hour, min, location: location)
-  end
-
   def create_profile
     storage = MemoryStorage.new
     storage.set_planned_dates [

spec/spec_helper.cr

@@ -1,2 +1,25 @@
 require "spec"
 require "../src/dayoff/**"
+
+def d(day)
+  location = Time::Location.load("Europe/Moscow")
+  Time.local(2019, 1, day, location: location)
+end
+
+def t(day, hour, min = 0)
+  location = Time::Location.load("Europe/Moscow")
+  Time.local(2019, 1, day, hour, min, location: location)
+end
+
+def with_temp_dir(&block)
+  tmpdir = File.tempname("dayoff_file_storage")
+  Dir.mkdir tmpdir
+  begin
+    yield tmpdir
+  ensure
+    Dir.glob(tmpdir + "/*") do |f|
+      File.delete f
+    end
+    Dir.rmdir tmpdir
+  end
+end

spec/storage_spec.cr

@@ -0,0 +1,17 @@
+require "./spec_helper"
+
+module Dayoff::Test
+  describe Storage do
+    it "can store data in file" do
+      with_temp_dir do |tmpdir|
+        storage = FileStorage.new tmpdir
+        storage.set_planned_dates [
+          PlannedDate.new(d(1), 8),
+          PlannedDate.new(d(1), 8),
+        ]
+        entries = Dir.glob(tmpdir + "/*")
+        1.should eq entries.size
+      end
+    end
+  end
+end

src/dayoff/storage.cr

@@ -2,30 +2,57 @@ require "json"
 
 module Dayoff
   abstract class Storage
-    abstract def get_planned_dates : Array(PlannedDate)
-    abstract def set_planned_dates(items : Array(PlannedDate))
-    abstract def get_work_records : Array(WorkRecord)
-    abstract def set_work_records(items : Array(WorkRecord))
+    macro st_abstract_def(name, dtype)
+      abstract def get_{{name}} : Array({{dtype}})
+      abstract def set_{{name}}(items : Array({{dtype}}))
+    end
+
+    st_abstract_def(planned_dates, PlannedDate)
+    st_abstract_def(work_records, WorkRecord)
   end
 
   class MemoryStorage < Storage
-    @planned_dates = [] of PlannedDate
-    @work_records = [] of WorkRecord
+    macro st_memory_def(name, dtype)
+      @{{name}} = [] of {{dtype}}
 
-    def get_planned_dates : Array(PlannedDate)
-      @planned_dates
+      def get_{{name}} : Array({{dtype}})
+        @{{name}}
       end
 
-    def set_planned_dates(items : Array(PlannedDate))
-      @planned_dates = items
+      def set_{{name}}(items : Array({{dtype}}))
+        @{{name}} = items
+      end
     end
 
-    def get_work_records : Array(WorkRecord)
-      @work_records
+    st_memory_def(planned_dates, PlannedDate)
+    st_memory_def(work_records, WorkRecord)
   end
 
-    def set_work_records(items : Array(WorkRecord))
-      @work_records = items
+  class FileStorage < Storage
+    def initialize(@path : String)
+    end
+
+    macro st_file_def(name, dtype, file)
+      @{{name}} = [] of {{dtype}}
+
+      def get_{{name}} : Array({{dtype}})
+        fname = File.join(@path, {{file}})
+        if File.exists? fname
+          content = File.read(fname)
+          Array({{dtype}}).from_json content
+        else
+          [] of {{dtype}}
         end
       end
+
+      def set_{{name}}(items : Array({{dtype}}))
+        fname = File.join(@path, {{file}})
+        content = items.to_pretty_json
+        File.write fname, content
+      end
+    end
+
+    st_file_def(planned_dates, PlannedDate, "planed-dates.json")
+    st_file_def(work_records, WorkRecord, "work_records.json")
+  end
 end