Reference RuleWithActions & Transaction object instead of copying values in RuleMessage

- Because the lifetime of the RuleMessage instances do not extend beyond
  the lifetime of the enclosing RuleWithActions & Transaction,
  RuleMessage can just reference it and simplify its definition.
- Additionally, make the references const to show that it doesn't modify it.
- Replace RuleMessage copy constructor with default implementations.
- Removed unused RuleMessage assignment operator (which cannot be implemented
  now that it has reference members).
- Removed constructor from RuleMessage pointer.
- Addressed Sonarcloud suggestions: Do not use the constructor's
  initializer list for data member "xxx". Use the in-class initializer
  instead.

headers/modsecurity/rule.h

@@ -65,7 +65,7 @@ using MatchActions = std::vector<actions::Action *>;
 class Rule {
  public:
     Rule(std::unique_ptr<std::string> fileName, int lineNumber)
-        : m_fileName(std::make_shared<std::string>(*fileName)),
+        : m_fileName(*fileName),
         m_lineNumber(lineNumber),
         m_phase(modsecurity::Phases::RequestHeadersPhase) {
         }
@@ -81,7 +81,7 @@ class Rule {
     virtual bool evaluate(Transaction *transaction,
         std::shared_ptr<RuleMessage> rm) = 0;
 
-    std::shared_ptr<std::string> getFileName() const {
+    const std::string& getFileName() const {
         return m_fileName;
     }
 
@@ -93,18 +93,15 @@ class Rule {
     void setPhase(int phase) { m_phase = phase; }
 
     virtual std::string getReference() {
-        if (m_fileName) {
-            return *m_fileName + ":" + std::to_string(m_lineNumber);
-        }
-        return "<<no file>>:" + std::to_string(m_lineNumber);
+        return m_fileName + ":" + std::to_string(m_lineNumber);
     }
 
 
     virtual bool isMarker() { return false; }
 
  private:
-    std::shared_ptr<std::string> m_fileName;
-    int m_lineNumber;
+    const std::string m_fileName;
+    const int m_lineNumber;
     // FIXME: phase may not be neede to SecMarker.
     int m_phase;
 };

headers/modsecurity/rule_message.h

@@ -42,116 +42,13 @@ class RuleMessage {
         ClientLogMessageInfo = 4
     };
 
-    /**
-     *
-     * FIXME: RuleMessage is currently too big, doing a lot of
-     * unnecessary data duplication. Needs to be shrink down.
-     *
-     */
-    RuleMessage(RuleWithActions *rule, Transaction *trans) :
-        m_accuracy(rule->m_accuracy),
-        m_clientIpAddress(trans->m_clientIpAddress),
-        m_data(""),
-        m_id(trans->m_id),
-        m_isDisruptive(false),
-        m_match(""),
-        m_maturity(rule->m_maturity),
-        m_message(""),
-        m_noAuditLog(false),
-        m_phase(rule->getPhase() - 1),
-        m_reference(""),
-        m_rev(rule->m_rev),
+    RuleMessage(const RuleWithActions &rule, const Transaction &trans) :
         m_rule(rule),
-        m_ruleFile(rule->getFileName()),
-        m_ruleId(rule->m_ruleId),
-        m_ruleLine(rule->getLineNumber()),
-        m_saveMessage(true),
-        m_serverIpAddress(trans->m_serverIpAddress),
-        m_requestHostName(trans->m_requestHostName),
-        m_severity(0),
-        m_uriNoQueryStringDecoded(trans->m_uri_no_query_string_decoded),
-        m_ver(rule->m_ver),
-        m_tags()
+        m_transaction(trans)
     { }
 
-    explicit RuleMessage(RuleMessage *rule) :
-        m_accuracy(rule->m_accuracy),
-        m_clientIpAddress(rule->m_clientIpAddress),
-        m_data(rule->m_data),
-        m_id(rule->m_id),
-        m_isDisruptive(rule->m_isDisruptive),
-        m_match(rule->m_match),
-        m_maturity(rule->m_maturity),
-        m_message(rule->m_message),
-        m_noAuditLog(rule->m_noAuditLog),
-        m_phase(rule->m_phase),
-        m_reference(rule->m_reference),
-        m_rev(rule->m_rev),
-        m_rule(rule->m_rule),
-        m_ruleFile(rule->m_ruleFile),
-        m_ruleId(rule->m_ruleId),
-        m_ruleLine(rule->m_ruleLine),
-        m_saveMessage(rule->m_saveMessage),
-        m_serverIpAddress(rule->m_serverIpAddress),
-        m_requestHostName(rule->m_requestHostName),
-        m_severity(rule->m_severity),
-        m_uriNoQueryStringDecoded(rule->m_uriNoQueryStringDecoded),
-        m_ver(rule->m_ver),
-        m_tags(rule->m_tags)
-    { }
-
-    RuleMessage(const RuleMessage& ruleMessage)
-        : m_accuracy(ruleMessage.m_accuracy),
-        m_clientIpAddress(ruleMessage.m_clientIpAddress),
-        m_data(ruleMessage.m_data),
-        m_id(ruleMessage.m_id),
-        m_isDisruptive(ruleMessage.m_isDisruptive),
-        m_match(ruleMessage.m_match),
-        m_maturity(ruleMessage.m_maturity),
-        m_message(ruleMessage.m_message),
-        m_noAuditLog(ruleMessage.m_noAuditLog),
-        m_phase(ruleMessage.m_phase),
-        m_reference(ruleMessage.m_reference),
-        m_rev(ruleMessage.m_rev),
-        m_rule(ruleMessage.m_rule),
-        m_ruleFile(ruleMessage.m_ruleFile),
-        m_ruleId(ruleMessage.m_ruleId),
-        m_ruleLine(ruleMessage.m_ruleLine),
-        m_saveMessage(ruleMessage.m_saveMessage),
-        m_serverIpAddress(ruleMessage.m_serverIpAddress),
-        m_requestHostName(ruleMessage.m_requestHostName),
-        m_severity(ruleMessage.m_severity),
-        m_uriNoQueryStringDecoded(ruleMessage.m_uriNoQueryStringDecoded),
-        m_ver(ruleMessage.m_ver),
-        m_tags(ruleMessage.m_tags)
-    { }
-
-    RuleMessage &operator=(const RuleMessage& ruleMessage) {
-        m_accuracy = ruleMessage.m_accuracy;
-        m_clientIpAddress = ruleMessage.m_clientIpAddress;
-        m_data = ruleMessage.m_data;
-        m_id = ruleMessage.m_id;
-        m_isDisruptive = ruleMessage.m_isDisruptive;
-        m_match = ruleMessage.m_match;
-        m_maturity = ruleMessage.m_maturity;
-        m_message = ruleMessage.m_message;
-        m_noAuditLog = ruleMessage.m_noAuditLog;
-        m_phase = ruleMessage.m_phase;
-        m_reference = ruleMessage.m_reference;
-        m_rev = ruleMessage.m_rev;
-        m_rule = ruleMessage.m_rule;
-        m_ruleFile = ruleMessage.m_ruleFile;
-        m_ruleId = ruleMessage.m_ruleId;
-        m_ruleLine = ruleMessage.m_ruleLine;
-        m_saveMessage = ruleMessage.m_saveMessage;
-        m_serverIpAddress = ruleMessage.m_serverIpAddress;
-        m_requestHostName = ruleMessage.m_requestHostName;
-        m_severity = ruleMessage.m_severity;
-        m_uriNoQueryStringDecoded = ruleMessage.m_uriNoQueryStringDecoded;
-        m_ver = ruleMessage.m_ver;
-        m_tags = ruleMessage.m_tags;
-        return *this;
-    }
+    RuleMessage(const RuleMessage &ruleMessage) = default;
+    RuleMessage &operator=(const RuleMessage &ruleMessage) = delete;
 
     void clean() {
         m_data = "";
@@ -159,7 +56,6 @@ class RuleMessage {
         m_isDisruptive = false;
         m_reference = "";
         m_severity = 0;
-        m_ver = "";
     }
 
     std::string log() {
@@ -187,28 +83,18 @@ class RuleMessage {
     static std::string _details(const RuleMessage *rm);
     static std::string _errorLogTail(const RuleMessage *rm);
 
-    int m_accuracy;
-    std::shared_ptr<std::string> m_clientIpAddress;
+    int getPhase() const { return m_rule.getPhase() - 1; }
+
+    const RuleWithActions &m_rule;
+    const Transaction &m_transaction;
     std::string m_data;
-    std::shared_ptr<std::string> m_id;
-    bool m_isDisruptive;
+    bool m_isDisruptive = false;
     std::string m_match;
-    int m_maturity;
     std::string m_message;
-    bool m_noAuditLog;
-    int m_phase;
+    bool m_noAuditLog = false;
     std::string m_reference;
-    std::string m_rev;
-    RuleWithActions *m_rule;
-    std::shared_ptr<std::string> m_ruleFile;
-    int m_ruleId;
-    int m_ruleLine;
-    bool m_saveMessage;
-    std::shared_ptr<std::string> m_serverIpAddress;
-    std::shared_ptr<std::string> m_requestHostName;
-    int m_severity;
-    std::shared_ptr<std::string> m_uriNoQueryStringDecoded;
-    std::string m_ver;
+    bool m_saveMessage = true;
+    int m_severity = 0;
 
     std::list<std::string> m_tags;
 };

headers/modsecurity/rule_with_actions.h

@@ -76,7 +76,7 @@ class RuleWithActions : public Rule {
     void performLogging(Transaction *trans,
         std::shared_ptr<RuleMessage> ruleMessage,
         bool lastLog = true,
-        bool chainedParentNull = false);
+        bool chainedParentNull = false) const;
 
     std::vector<actions::Action *> getActionsByName(const std::string& name,
         Transaction *t);

headers/modsecurity/transaction.h

@@ -57,7 +57,7 @@ typedef struct Rules_t RulesSet;
 #define ms_dbg(b, c) \
   do { \
       if (m_rules && m_rules->m_debugLog && m_rules->m_debugLog->m_debugLevel >= b) { \
-          m_rules->debug(b, *m_id.get(), m_uri, c); \
+          m_rules->debug(b, m_id, m_uri, c); \
       } \
   } while (0);
 #else
@@ -431,7 +431,7 @@ class Transaction : public TransactionAnchoredVariables, public TransactionSecMa
     /**
      * Holds the client IP address.
      */
-    std::shared_ptr<std::string> m_clientIpAddress;
+    std::string m_clientIpAddress;
 
     /**
      * Holds the HTTP version: 1.2, 2.0, 3.0 and so on....
@@ -441,12 +441,12 @@ class Transaction : public TransactionAnchoredVariables, public TransactionSecMa
     /**
      * Holds the server IP Address
      */
-    std::shared_ptr<std::string> m_serverIpAddress;
+    std::string m_serverIpAddress;
 
     /**
      * Holds the request's hostname
      */
-    std::shared_ptr<std::string> m_requestHostName;
+    std::string m_requestHostName;
 
     /**
      * Holds the raw URI that was requested.
@@ -456,7 +456,7 @@ class Transaction : public TransactionAnchoredVariables, public TransactionSecMa
     /**
      * Holds the URI that was requests (without the query string).
      */
-    std::shared_ptr<std::string> m_uri_no_query_string_decoded;
+    std::string m_uri_no_query_string_decoded;
 
     /**
      * Holds the combined size of all arguments, later used to fill the
@@ -568,7 +568,7 @@ class Transaction : public TransactionAnchoredVariables, public TransactionSecMa
      * Contains the unique ID of the transaction. Use by the variable
 	 * `UNIQUE_ID'. This unique id is also saved as part of the AuditLog.
      */
-    std::shared_ptr<std::string> m_id;
+    std::string m_id;
 
     /**
      * Holds the amount of rules that should be skipped. If bigger than 0 the