end of day commit

2012-08-29 17:42:04 +02:00
parent 89700f36e9
commit 8213bae2c6
57 changed files with 1109 additions and 128 deletions
@@ -0,0 +1,40 @@
+module RQRCode
+  module SizeCalculator
+    # size - seems to follow this logic
+    #     # | input | modules 
+    #       | size  | created
+    #-------|-------|--------
+    #     1 |     7 |      21
+    #     2 |    14 |      25 (+4)
+    #     3 |    24 |      29   -
+    #     4 |    34 |      33   -
+    #     5 |    44 |      37   -
+    #     6 |    58 |      41   -
+    #     7 |    64 |      45   -
+    #     8 |    84 |      49   -
+    #     9 |    98 |      53   -
+    #    10 |   119 |      57   -
+    #    11 |   137 |      61   -
+    #    12 |   155 |      65   -
+    #    13 |   177 |      69   -
+    #    14 |   194 |      73   -
+    
+    QR_CHAR_SIZE_VS_SIZE = [7, 14, 24, 34, 44, 58, 64, 84, 98, 119, 137, 155, 177, 194]
+    
+    def minimum_qr_size_from_string(string)
+      QR_CHAR_SIZE_VS_SIZE.each_with_index do |size, index|
+        return (index + 1) if string.size < size
+      end
+      
+      # If it's particularly big, we'll try and create codes until it accepts
+      i = QR_CHAR_SIZE_VS_SIZE.size
+      begin
+        i += 1
+        RQRCode::QRCode.new(string, :size => i)
+        return i
+      rescue RQRCode::QRCodeRunTimeError
+        retry
+      end
+    end
+  end
+end