refactor: move stateless utilities to DIRACCommon

Move ClassAd, ParametricJob, and stateless JobDBUtils functions to DIRACCommon
to reduce circular dependencies with diracx. Add backward compatibility
re-exports in DIRAC modules.

Changes:
- DIRACCommon/Utils/ClassAd/ClassAdLight.py: Complete ClassAd implementation
- DIRACCommon/Utils/ParametricJob.py: Parametric job utilities
- DIRACCommon/Utils/JobDBUtils.py: Stateless JDL compression/decompression
- Added comprehensive tests for all moved functionality
- Updated DIRAC modules to re-export from DIRACCommon for compatibility

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: chrisburr

dirac-common/src/DIRACCommon/Utils/ClassAd/ClassAdLight.py

@@ -0,0 +1,295 @@
+""" ClassAd Class - a light purely Python representation of the
+    Condor ClassAd library.
+"""
+
+
+class ClassAd:
+    def __init__(self, jdl):
+        """ClassAd constructor from a JDL string"""
+        self.contents = {}
+        result = self.__analyse_jdl(jdl)
+        if result:
+            self.contents = result
+
+    def __analyse_jdl(self, jdl, index=0):
+        """Analyse one [] jdl enclosure"""
+
+        jdl = jdl.strip()
+
+        # Strip all the blanks first
+        # temp = jdl.replace(' ','').replace('\n','')
+        temp = jdl
+
+        result = {}
+
+        if temp[0] != "[" or temp[-1] != "]":
+            print("Invalid JDL: it should start with [ and end with ]")
+            return result
+
+        # Parse the jdl string now
+        body = temp[1:-1]
+        index = 0
+        namemode = 1
+        valuemode = 0
+        while index < len(body):
+            if namemode:
+                ind = body.find("=", index)
+                if ind != -1:
+                    name = body[index:ind]
+                    index = ind + 1
+                    valuemode = 1
+                    namemode = 0
+                else:
+                    break
+            elif valuemode:
+                ind1 = body.find("[", index)
+                ind2 = body.find(";", index)
+                if ind1 != -1 and ind1 < ind2:
+                    value, newind = self.__find_subjdl(body, ind1)
+                elif ind1 == -1 and ind2 == -1:
+                    value = body[index:]
+                    newind = len(body)
+                else:
+                    if index == ind2:
+                        return {}
+                    else:
+                        value = body[index:ind2]
+                        newind = ind2 + 1
+
+                result[name.strip()] = value.strip().replace("\n", "")
+                index = newind
+                valuemode = 0
+                namemode = 1
+
+        return result
+
+    def __find_subjdl(self, body, index):
+        """Find a full [] enclosure starting from index"""
+        result = ""
+        if body[index] != "[":
+            return (result, 0)
+
+        depth = 0
+        ind = index
+        while depth < 10:
+            ind1 = body.find("]", ind + 1)
+            ind2 = body.find("[", ind + 1)
+            if ind2 != -1 and ind2 < ind1:
+                depth += 1
+                ind = ind2
+            else:
+                if depth > 0:
+                    depth -= 1
+                    ind = ind1
+                else:
+                    result = body[index : ind1 + 1]
+                    if body[ind1 + 1] == ";":
+                        return (result, ind1 + 2)
+                    return result, 0
+
+        return result, 0
+
+    def insertAttributeInt(self, name, attribute):
+        """Insert a named integer attribute"""
+
+        self.contents[name] = str(attribute)
+
+    def insertAttributeBool(self, name, attribute):
+        """Insert a named boolean attribute"""
+
+        if attribute:
+            self.contents[name] = "true"
+        else:
+            self.contents[name] = "false"
+
+    def insertAttributeString(self, name, attribute):
+        """Insert a named string attribute"""
+
+        self.contents[name] = '"' + str(attribute) + '"'
+
+    def insertAttributeVectorString(self, name, attributelist):
+        """Insert a named string list attribute"""
+
+        tmp = ['"' + x + '"' for x in attributelist]
+        tmpstr = ",".join(tmp)
+        self.contents[name] = "{" + tmpstr + "}"
+
+    def insertAttributeVectorInt(self, name, attributelist):
+        """Insert a named string list attribute"""
+
+        tmp = [str(x) for x in attributelist]
+        tmpstr = ",".join(tmp)
+        self.contents[name] = "{" + tmpstr + "}"
+
+    def insertAttributeVectorStringList(self, name, attributelist):
+        """Insert a named list of string lists"""
+
+        listOfLists = []
+        for stringList in attributelist:
+            # tmp = map ( lambda x : '"' + x + '"', stringList )
+            tmpstr = ",".join(stringList)
+            listOfLists.append("{" + tmpstr + "}")
+        self.contents[name] = "{" + ",".join(listOfLists) + "}"
+
+    def lookupAttribute(self, name):
+        """Check the presence of the given attribute"""
+
+        return name in self.contents
+
+    def set_expression(self, name, attribute):
+        """Insert a named expression attribute"""
+
+        self.contents[name] = str(attribute)
+
+    def get_expression(self, name):
+        """Get expression corresponding to a named attribute"""
+
+        if name in self.contents:
+            if isinstance(self.contents[name], int):
+                return str(self.contents[name])
+            return self.contents[name]
+        return ""
+
+    def isAttributeList(self, name):
+        """Check if the given attribute is of the List type"""
+        attribute = self.get_expression(name).strip()
+        return attribute.startswith("{")
+
+    def getListFromExpression(self, name):
+        """Get a list of strings from a given expression"""
+
+        tempString = self.get_expression(name).strip()
+        listMode = False
+        if tempString.startswith("{"):
+            tempString = tempString[1:-1]
+            listMode = True
+
+        tempString = tempString.replace(" ", "").replace("\n", "")
+        if tempString.find("{") < 0:
+            if not listMode:
+                tempString = tempString.replace('"', "")
+                if not tempString:
+                    return []
+                return tempString.split(",")
+
+        resultList = []
+        while tempString:
+            if tempString.find("{") == 0:
+                end = tempString.find("}")
+                resultList.append(tempString[: end + 1])
+                tempString = tempString[end + 1 :]
+                if tempString.startswith(","):
+                    tempString = tempString[1:]
+            elif tempString.find('"') == 0:
+                end = tempString[1:].find('"')
+                resultList.append(tempString[1 : end + 1])
+                tempString = tempString[end + 2 :]
+                if tempString.startswith(","):
+                    tempString = tempString[1:]
+            else:
+                end = tempString.find(",")
+                if end < 0:
+                    resultList.append(tempString.replace('"', "").replace(" ", ""))
+                    break
+                else:
+                    resultList.append(tempString[:end].replace('"', "").replace(" ", ""))
+                    tempString = tempString[end + 1 :]
+
+        return resultList
+
+    def getDictionaryFromSubJDL(self, name):
+        """Get a dictionary of the JDL attributes from a subsection"""
+
+        tempList = self.get_expression(name)[1:-1]
+        resDict = {}
+        for item in tempList.split(";"):
+            if len(item.split("=")) == 2:
+                resDict[item.split("=")[0].strip()] = item.split("=")[1].strip().replace('"', "")
+            else:
+                return {}
+
+        return resDict
+
+    def deleteAttribute(self, name):
+        """Delete a named attribute"""
+
+        if name in self.contents:
+            del self.contents[name]
+            return 1
+        return 0
+
+    def isOK(self):
+        """Check the JDL validity - to be defined"""
+
+        if self.contents:
+            return 1
+        return 0
+
+    def asJDL(self):
+        """Convert the JDL description into a string"""
+
+        result = []
+        for name, value in sorted(self.contents.items()):
+            if value[0:1] == "{":
+                result += [4 * " " + name + " = \n"]
+                result += [8 * " " + "{\n"]
+                strings = value[1:-1].split(",")
+                for st in strings:
+                    result += [12 * " " + st.strip() + ",\n"]
+                result[-1] = result[-1][:-2]
+                result += ["\n" + 8 * " " + "};\n"]
+            elif value[0:1] == "[":
+                tempad = ClassAd(value)
+                tempjdl = tempad.asJDL() + ";"
+                lines = tempjdl.split("\n")
+                result += [4 * " " + name + " = \n"]
+                for line in lines:
+                    result += [8 * " " + line + "\n"]
+
+            else:
+                result += [4 * " " + name + " = " + str(value) + ";\n"]
+        if result:
+            result[-1] = result[-1][:-1]
+        return "[ \n" + "".join(result) + "\n]"
+
+    def getAttributeString(self, name):
+        """Get String type attribute value"""
+        value = ""
+        if self.lookupAttribute(name):
+            value = self.get_expression(name).replace('"', "")
+        return value
+
+    def getAttributeInt(self, name):
+        """Get Integer type attribute value"""
+        value = None
+        if self.lookupAttribute(name):
+            try:
+                value = int(self.get_expression(name).replace('"', ""))
+            except Exception:
+                value = None
+        return value
+
+    def getAttributeBool(self, name):
+        """Get Boolean type attribute value"""
+        if not self.lookupAttribute(name):
+            return False
+
+        value = self.get_expression(name).replace('"', "")
+        return value.lower() == "true"
+
+    def getAttributeFloat(self, name):
+        """Get Float type attribute value"""
+        value = None
+        if self.lookupAttribute(name):
+            try:
+                value = float(self.get_expression(name).replace('"', ""))
+            except Exception:
+                value = None
+        return value
+
+    def getAttributes(self) -> list[str]:
+        """Get the list of all the attribute names
+
+        :return: list of names as strings
+        """
+        return list(self.contents)

dirac-common/src/DIRACCommon/Utils/ClassAd/__init__.py

@@ -0,0 +1 @@
+"""ClassAd utilities for DIRACCommon"""

dirac-common/src/DIRACCommon/Utils/JobDBUtils.py

@@ -0,0 +1,33 @@
+"""Stateless JobDB utilities extracted from DIRAC for DIRACCommon"""
+
+from __future__ import annotations
+
+import base64
+import zlib
+
+
+def compressJDL(jdl):
+    """Return compressed JDL string."""
+    return base64.b64encode(zlib.compress(jdl.encode(), -1)).decode()
+
+
+def extractJDL(compressedJDL):
+    """Return decompressed JDL string."""
+    # the starting bracket is guaranteeed by JobManager.submitJob
+    # we need the check to be backward compatible
+    if isinstance(compressedJDL, bytes):
+        if compressedJDL.startswith(b"["):
+            return compressedJDL.decode()
+    else:
+        if compressedJDL.startswith("["):
+            return compressedJDL
+    return zlib.decompress(base64.b64decode(compressedJDL)).decode()
+
+
+def fixJDL(jdl: str) -> str:
+    """Fix possible lack of brackets in JDL"""
+    # 1.- insert original JDL on DB and get new JobID
+    # Fix the possible lack of the brackets in the JDL
+    if jdl.strip()[0].find("[") != 0:
+        jdl = "[" + jdl + "]"
+    return jdl