Merge pull request #5 from PowellDean/sheetnames

Add the ability for worksheet names to be stored.

src/xlsx-parser/book.cr

@@ -44,13 +44,48 @@ module XlsxParser
       rels = XML.parse(@zip["xl/_rels/workbook.xml.rels"].open(&.gets_to_end))
 
       @sheets = sheets_nodes.map do |sheet|
+        sheetname = sheet["name"]
         sheetfile = rels.xpath_string(
           "string(//*[name()='Relationship' and contains(@Id,'#{sheet["id"]}')]/@Target)"
         )
-        Sheet.new(self, sheetfile)
+        Sheet.new(self, sheetfile, sheetname)
       end
     end
 
+    # Return True if the given sheet name appears in the workbook
+    def sheetname?(search_name : String)
+      this_sheet = sheetname search_name
+      if this_sheet.nil?
+        false
+      else
+        true
+      end
+    end
+
+    # Return the Worksheet with the given name, or nil if that sheet name
+    # can't be found in the workbook
+    def sheetname(search_name : String)
+      found_sheet = nil
+      @sheets.each do | sheet |
+        if sheet.name == search_name
+          found_sheet = sheet
+          break
+        end
+      end
+
+      found_sheet
+    end
+
+    # Return an array of all sheet names in the current workbook
+    def sheetnames
+      name_list = [] of String
+      @sheets.each do | sheet |
+        name_list << sheet.name
+      end
+
+      name_list
+    end
+
     # Close previously opened given file/filename
     def close
       @zip.close

src/xlsx-parser/sheet.cr

@@ -1,11 +1,12 @@
 module XlsxParser
   class Sheet
     getter node : XML::Reader
+    getter name : String
 
     # All possible output types
     alias Type = Bool | Float64 | Int32 | String | Time
 
-    def initialize(@book : Book, @file : String)
+    def initialize(@book : Book, @file : String, @name : String)
       @node = XML::Reader.new(@book.zip["xl/#{@file}"].open(&.gets_to_end))
     end