[backend] Overloaded getDiagnosisStatistics to get statistics for 8 weeks prior to given date

iTrust/src/edu/ncsu/csc/itrust/action/ViewDiagnosisStatisticsAction.java

@@ -97,6 +97,53 @@ public class ViewDiagnosisStatisticsAction {
         return dsBean;
     }
 
+    /**
+     * Gets the counts of local and regional diagnoses for the specified input (lower date 8 weeks prior to upper date)
+     *
+     * @param upperDate The ending date for the time range
+     * @param icdCode The diagnosis code to examine
+     * @param zip The zip code to examine
+     * @return A bean containing the local and regional counts
+     * @throws FormValidationException
+     * @throws ITrustException
+     */
+    public DiagnosisStatisticsBean getDiagnosisStatistics(String upperDate, String icdCode, String zip) throws FormValidationException, ITrustException {
+        DiagnosisStatisticsBean dsBean;
+        try {
+
+            if (upperDate == null || icdCode == null)
+                return null;
+
+            Date upper = new SimpleDateFormat("MM/dd/yyyy").parse(upperDate);
+
+            //calculate lower date by finding the date that is 8 weeks prior to upperDate
+            Calendar cal = Calendar.getInstance();
+            cal.setTime(upper);
+            cal.add(Calendar.HOUR, -56*24);
+            Date lower = cal.getTime();
+
+            if (!zip.matches("([0-9]{5})|([0-9]{5}-[0-9]{4})"))
+                throw new FormValidationException("Zip Code must be 5 digits!");
+
+            boolean validCode = false;
+            for(DiagnosisBean diag : getDiagnosisCodes()) {
+                if (diag.getICDCode().equals(icdCode))
+                    validCode = true;
+            }
+            if (validCode == false) {
+                throw new FormValidationException("ICDCode must be valid diagnosis!");
+            }
+
+            dsBean = diagnosesDAO.getDiagnosisCounts(icdCode, zip, lower, upper);
+
+        } catch (ParseException e) {
+            throw new FormValidationException("Enter date in MM/dd/yyyy");
+        }
+
+
+        return dsBean;
+    }
+
     public List<DiagnosisStatisticsBean> getDiagnosisTrends(String dateString, String icdCode, String zip) throws FormValidationException, ITrustException {
         ArrayList<DiagnosisStatisticsBean> dsBean = null;
         if (dateString == null || icdCode == null) {