added :before option to add_formats to insert above existing format

README

@@ -94,7 +94,7 @@ as dates.
   validates_datetime :appointment_date, :before => Proc.new { 1.week.from_now }
   
 
-== DATE/TIME FORMATS:
+=== DATE/TIME FORMATS:
 
 So what formats does the plugin allow. Well there are default formats which can 
 be added to easily using the plugins format rules. Also formats can be easily 
@@ -175,8 +175,9 @@ For the technically minded (well you are developers), these formats are compiled
 into regular expressions at runtime so don't add any extra overhead than using
 regular expressions directly. So, no, it won't make your app slow!
 
+To see all defined formats look in the lib/validates_timeliness/formats.rb.
 
-== CUSTOMISING FORMATS:
+=== CUSTOMISING FORMATS:
 
 I hear you say "Thats greats but I don't want X format to be valid". Well to 
 remove a format stick this in an initializer file or environment.rb
@@ -192,8 +193,17 @@ Ahh, then add it yourself. Again stick this in an initializer file or environmen
 
 Now '10 o'clock' will be a valid value. So easy, no more whingeing!
 
+Because formats are evaluated in order, adding a format which may be ambiguous 
+with an existing format, will mean your format is ignored. If you need to make
+your new format higher precedence than an existing format, you can include the 
+before option like so
 
-== EXTERNAL PARSER:
+    ValidatesTimeliness::Formats.add_formats(:time, 'ss:nn:hh', :before => 'hh:nn:ss')
+
+Now a time of '59:30:23' will be interpreted as 11:30:59 pm. This option saves
+you adding a new one and deleting an old one to get it to work.
+
+=== EXTERNAL PARSER:
 
 I mentioned earlier that you could use a pluggable or alternative parser such
 as Chronic instead of the in built one. So if you need some super fancy stuff that 

lib/validates_timeliness/formats.rb

@@ -179,15 +179,15 @@ module ValidatesTimeliness
       #
       # Examples:
       #
-      #   'yyyy-mm-dd hh:nn'     => lambda {|y,m,d,h,n| md||=0; [unambiguous_year(y),month_index(m),d,full_hour(h,md),n,nil,nil].map {|t| t.to_i unless t.nil? } }
-      #   'dd/mm/yyyy h:nn_ampm' => lambda {|d,m,y,h,n,md| md||=0; [unambiguous_year(y),month_index(m),d,full_hour(h,md),n,nil,nil].map {|t| t.to_i unless t.nil? } }
+      #   'yyyy-mm-dd hh:nn'     => lambda {|y,m,d,h,n| md||=0; [unambiguous_year(y),month_index(m),d,full_hour(h,md),n,nil,nil].map {|t| t.to_i if t } }
+      #   'dd/mm/yyyy h:nn_ampm' => lambda {|d,m,y,h,n,md| md||=0; [unambiguous_year(y),month_index(m),d,full_hour(h,md),n,nil,nil].map {|t| t.to_i if t } }
       #
       def format_proc(order)
         arg_map = format_proc_args
         args = order.invert.sort.map {|p| arg_map[p[1]][1] }
         arr = [nil] * 7
         order.keys.each {|k| i = arg_map[k][0]; arr[i] = arg_map[k][2] unless i.nil? }
-        proc_string = "lambda {|#{args.join(',')}| md||=nil; [#{arr.map {|i| i.nil? ? 'nil' : i }.join(',')}].map {|t| t.to_i unless t.nil? } }"
+        proc_string = "lambda {|#{args.join(',')}| md||=nil; [#{arr.map {|i| i.nil? ? 'nil' : i }.join(',')}].map {|t| t.to_i if t } }"
         eval proc_string
       end
       
@@ -202,7 +202,8 @@ module ValidatesTimeliness
       end
       
       # Loop through format expressions for type and call proc on matches. Allow
-      # pre or post match strings to exist if strict is false. 
+      # pre or post match strings to exist if strict is false. Otherwise wrap
+      # regexp in start and end anchors.
       # Returns 7 part datetime array.
       def extract_date_time_values(time_string, type, strict=true)
         expressions = self.send("#{type}_expressions")
@@ -217,6 +218,7 @@ module ValidatesTimeliness
         return time_array
       end
       
+      # Delete formats of specified type. Error raised if format not found.
       def remove_formats(type, *remove_formats)
         remove_formats.each do |format|
           unless self.send("#{type}_formats").delete(format)
@@ -226,14 +228,22 @@ module ValidatesTimeliness
         compile_format_expressions
       end
       
+      # Adds new formats. Must specify format type and can specify a :before
+      # option to nominate which format the new formats should be inserted in 
+      # front on to take higher precedence. Error is raise if format already 
+      # exists or if :before format is not found.
       def add_formats(type, *add_formats)
         formats = self.send("#{type}_formats")
+        options = {}
+        options = add_formats.pop if add_formats.last.is_a?(Hash)
+        before = options[:before]
+        raise "Format for :before option #{format} was not found." if before && !formats.include?(before)
         
         add_formats.each do |format|
-          if formats.include?(format)
-            raise "Format #{format} is already included in #{type} formats"
-          end
-          formats << format
+          raise "Format #{format} is already included in #{type} formats" if formats.include?(format)
+
+          index = before ? formats.index(before) : -1
+          formats.insert(index, format)
         end
         compile_format_expressions
       end

spec/formats_spec.rb

@@ -180,6 +180,10 @@ describe ValidatesTimeliness::Formats do
       validate('2.12am', :time).should be_false
     end
     
+    it "should raise error if format does not exist" do
+      lambda { formats.remove_formats(:time, "ss:hh:nn") }.should raise_error()
+    end
+    
     after do
       formats.time_formats << 'h.nn_ampm'
     end
@@ -190,7 +194,7 @@ describe ValidatesTimeliness::Formats do
       formats.compile_format_expressions
     end
     
-    it "should add format to format array" do      
+    it "should add format to format array" do
       formats.add_formats(:time, "h o'clock")
       formats.time_formats.should include("h o'clock")
     end
@@ -201,8 +205,24 @@ describe ValidatesTimeliness::Formats do
       validate("12 o'clock", :time).should be_true
     end
     
+    it "should add format before specified format and be higher precedence" do      
+      formats.add_formats(:time, "ss:hh:nn", :before => 'hh:nn:ss')
+      validate("59:23:58", :time).should be_true
+      time_array = formats.extract_date_time_values('59:23:58', :time)
+      time_array.should == [nil,nil,nil,23,58,59,nil]
+    end
+
+    it "should raise error if format exists" do
+      lambda { formats.add_formats(:time, "hh:nn:ss") }.should raise_error()
+    end
+    
+    it "should raise error if format exists" do
+      lambda { formats.add_formats(:time, "ss:hh:nn", :before => 'nn:hh:ss') }.should raise_error()
+    end
+    
     after do
       formats.time_formats.delete("h o'clock")
+      formats.time_formats.delete("ss:hh:nn")
     end
   end
  

spec/validations_spec.rb

@@ -53,10 +53,12 @@ describe ValidatesTimeliness::Validations do
       @person.should be_valid
     end
     
-    it "should be valid with values before epoch" do
-      @person.birth_date_and_time = "1960-01-31 12:12:12"
-      @person.birth_date = "1960-01-31"
-      @person.birth_time = "23:59"
+    # What is going on? No fall back.
+    it "should be valid with values before out of Time range" do
+      @person.birth_date_and_time = "1890-01-31 12:12:12"
+      @person.birth_date = "1890-01-31"
+      @person.birth_time = "23:59:59"
+      puts @person.errors.inspect
       @person.should be_valid
     end
     
@@ -74,7 +76,7 @@ describe ValidatesTimeliness::Validations do
       before :all do
         class DateTimeBeforeAfter < Person
           validates_timeliness_of :birth_date_and_time, :type => :datetime,
-            :before => Time.now, :after => 1.day.ago
+            :before => lambda { Time.now }, :after => lambda { 1.day.ago}
         end
       end
 
@@ -111,8 +113,8 @@ describe ValidatesTimeliness::Validations do
       before :all do
         class DateTimeOnOrBeforeAndAfter < Person
           validates_timeliness_of :birth_date_and_time, :type => :datetime,
-            :on_or_before => Time.now.at_midnight, 
-            :on_or_after => 1.day.ago
+            :on_or_before => lambda { Time.now.at_midnight },
+            :on_or_after => lambda { 1.day.ago }
         end
       end
       
@@ -311,8 +313,12 @@ describe ValidatesTimeliness::Validations do
   describe "with mixed value and restriction types" do
     before :all do
       class MixedBeforeAndAfter < Person
-        validates_timeliness_of :birth_date_and_time, :before => Date.new(2008,1,2), :after => lambda { Time.mktime(2008, 1, 1) }
-        validates_timeliness_of :birth_date, :type => :date, :on_or_before => Time.mktime(2008, 1, 2), :on_or_after => :birth_date_and_time
+        validates_timeliness_of :birth_date_and_time, 
+                                  :before => Date.new(2008,1,2), 
+                                  :after => lambda { Time.mktime(2008, 1, 1) }
+        validates_timeliness_of :birth_date, :type => :date, 
+                                  :on_or_before => lambda { Time.mktime(2008, 1, 2) }, 
+                                  :on_or_after => :birth_date_and_time
       end
     end