function to validate ds2 variable names

Signed-off-by: David Weik <[email protected]>

Author: Criptic

index.html

@@ -108,6 +108,7 @@
         <script src="./js/utility/get-URL-search-parameters.js"></script>
         <script src="./js/utility/get-model-variables.js"></script>
         <script src="./js/utility/delete-model-variable.js"></script>
+        <script src="./js/utility/validate-ds2-variable-name.js"></script>
 
         <!-- Import Object Builder -->
         <script src="./js/objects/add-text-objects.js"></script>

js/utility/validate-ds2-variable-name.js

@@ -0,0 +1,38 @@
+/**
+ * A function that checks a string for being a valid variable name in DS2 - 
+ * @param {String} name - Potential name of the variable
+ * @returns {Boolean} - True if a valid name, False if an invalid name
+ */
+function isValidDS2VariableName(name) {
+    // Check the general pattern: starts with a letter or underscore, followed by letters, digits, or underscores
+    const identifierPattern = /^[A-Za-z_][A-Za-z0-9_]*$/;
+    if (!identifierPattern.test(name)) {
+        return false;
+    }
+
+    // Check the length of the pattern
+    if (name.length > 255) {
+        return false;
+    }
+
+  // Reserved keywords (converted to lowercase for case-insensitive check)
+    const reservedKeywords = new Set([
+        "___kplist", "_all_", "_hostname_", "_new_", "_localnthreads_", "_localthreadid_", "_nthreads_",
+        "_null_", "_rc_", "_rowset_", "_temporary_", "_threadid_", "abort", "and", "as", "asm",
+        "bigint", "binary", "by", "call", "catalog", "char", "character", "commit", "continue",
+        "data", "date", "dcl", "decimal", "declare", "delete", "descending", "dim", "do", "double",
+        "drop", "ds2_options", "elif", "else", "end", "enddata", "endmodule", "endpackage",
+        "endstage", "endtable", "endthread", "eq", "error", "escape", "float", "format", "fortran",
+        "forward", "from", "function", "ge", "global", "goto", "group", "gt", "having", "identity",
+        "if", "in", "indsname", "indsnum", "informat", "inline", "input", "int", "integer", "in_out",
+        "keep", "label", "le", "leave", "like", "list", "lt", "merge", "method", "missing", "modify",
+        "module", "national", "nchar", "ne", "ng", "nl", "not", "null", "numeric", "nvarchar", "ods",
+        "of", "or", "order", "other", "otherwise", "output", "overwrite", "package", "partition",
+        "precision", "private", "program", "put", "real", "remove", "rename", "replace", "require",
+        "retain", "return", "returns", "rollback", "select", "set", "smallint", "sqlsub", "stage",
+        "stop", "stored", "substr", "system", "table", "then", "this", "thread", "threads", "time",
+        "timestamp", "tinyint", "to", "transaction", "t_udf", "tspl_options", "until", "update",
+        "vararray", "varbinary", "varchar", "varlist", "varying", "when", "where", "while"
+    ]);
+    return !reservedKeywords.has(name.toLowerCase());
+}