Initial commit

snippets/isValidDate.sh

@@ -0,0 +1,49 @@
+#!/usr/bin/env bash
+
+isDateInvalid()
+{
+    DATE="${1}"
+
+    # Autorized separator char ['space', '/', '.', '_', '-']
+    SEPAR="([ \/._-])?"
+
+    # Date format day[01..31], month[01,03,05,07,08,10,12], year[1900..2099]
+    DATE_1="((([123][0]|[012][1-9])|3[1])${SEPAR}(0[13578]|1[02])${SEPAR}(19|20)[0-9][0-9])"
+
+    # Date format day[01..30], month[04,06,09,11], year[1900..2099]
+    DATE_2="(([123][0]|[012][1-9])${SEPAR}(0[469]|11)${SEPAR}(19|20)[0-9][0-9])"
+
+    # Date format day[01..28], month[02], year[1900..2099]
+    DATE_3="(([12][0]|[01][1-9]|2[1-8])${SEPAR}02${SEPAR}(19|20)[0-9][0-9])"
+
+    # Date format day[29], month[02], year[1904..2096]
+    DATE_4="(29${SEPAR}02${SEPAR}(19|20(0[48]|[2468][048]|[13579][26])))"
+
+    # Date 29.02.2000
+    DATE_5="(29${SEPAR}02${SEPAR}2000)"
+
+    # Match the date in the Regex
+
+    #if ! [[ "${DATE}" =~ ^(${DATE_1}|${DATE_2}|${DATE_3}|${DATE_4})$ ]]
+    #then
+    #    echo -e "ERROR - '${DATE}' invalid!"
+    #else
+    #    echo "${DATE} is valid"
+    #fi
+
+    if [[ "${DATE}" =~ ^(${DATE_1}|${DATE_2}|${DATE_3}|${DATE_4}|${DATE_5})$ ]] ; then
+      return 1
+    else
+      return 0
+   fi
+}
+
+echo
+if  isDateInvalid "${1}" ; then
+   echo "inavalid Date: ${1}"
+else
+   echo "${1} is valid."
+fi
+echo
+
+exit 0