batch Text replace script

A batch script that will search through a directory of files and look for a text string and then replace the text string with a combination of text as well as the filename for the file being edited. so for example, if there are 5 files in the directory then each file would be edited to replace the "searchstring" with the "replacestring + filename" sequence. and the script should be configurable to search for one or more filetypes of .txt, .csv, .htm, .html or just all files. ## Deliverables just to clarify that each file will be edited as follows: file1 will have "replacestring + [login to view URL]" file2 will have "replacestring + [login to view URL]" file3 will have "replacestring + [login to view URL]"