now loads from either a units directory or a single units file

src/loaders/Suite.cpp

@@ -19,13 +19,52 @@
 */
 
 #include <string.h>
+#include <syslog.h>
+#include <sys/stat.h>
 #include "Suite.h"
+#include <dirent.h>
 
 /// Suite_InvalidUnitMember - Exception thrown when a Suite tries to access a contained Unit's value that is not
 /// present in the Unit.
-class Suite_InvalidUnitMember: public std::runtime_error { public:
-    // TODO rework this to accept the name of the member not able to be fetched.
-    Suite_InvalidUnitMember(): std::runtime_error("Suite: Attempted to access a member of a Unit that is not set.") {}
+class SuiteException: public std::exception
+{
+public:
+    /** Constructor (C strings).
+     *  @param message C-style string error message.
+     *                 The string contents are copied upon construction.
+     *                 Hence, responsibility for deleting the char* lies
+     *                 with the caller.
+     */
+    explicit SuiteException(const char* message):
+            msg_(message)
+    {
+    }
+
+    /** Constructor (C++ STL strings).
+     *  @param message The error message.
+     */
+    explicit SuiteException(const std::string& message):
+            msg_(message)
+    {}
+
+    /** Destructor.
+     * Virtual to allow for subclassing.
+     */
+    virtual ~SuiteException() throw (){}
+
+    /** Returns a pointer to the (constant) error description.
+     *  @return A pointer to a const char*. The underlying memory
+     *          is in posession of the Exception object. Callers must
+     *          not attempt to free the memory.
+     */
+    virtual const char* what() const throw (){
+        return msg_.c_str();
+    }
+
+protected:
+    /** Error message.
+     */
+    std::string msg_;
 };
 
 
@@ -42,20 +81,88 @@ class Suite_InvalidUnitMember: public std::runtime_error { public:
 /// if the implementor so desires.
 Suite::Suite(): JSON_Loader() {};
 
+
+bool is_file( std::string path)
+{
+    struct stat buf;
+    stat( path.c_str(), &buf );
+    return S_ISREG(buf.st_mode);
+}
+
+bool is_dir( std::string path )
+{
+    struct stat buf;
+    stat( path.c_str(), &buf );
+    return S_ISDIR(buf.st_mode);
+}
+
+void get_units_from_dir( std::vector<std::string> * files, std::string path )
+{
+    DIR* dirFile = opendir( path.c_str() );
+    if ( dirFile )
+    {
+        std::string entry;
+
+        struct dirent* hFile;
+        errno = 0;
+        while (( hFile = readdir( dirFile )) != NULL )
+        {
+            if ( !strcmp( hFile->d_name, "."  )) continue;
+            if ( !strcmp( hFile->d_name, ".." )) continue;
+
+            // hidden files
+            if ( hFile->d_name[0] == '.' ) continue;
+
+            // dirFile.name is the name of the file. Do whatever string comparison
+            // you want here. Something like:
+            if ( strstr( hFile->d_name, ".units" ))
+            {
+                std::string full_path = path + hFile->d_name;
+                files->push_back( full_path );
+            }
+        }
+        closedir( dirFile );
+    } else {
+        std::cout << "file not found" << std::endl;
+    }
+}
+
+
+
 /// Suite::load_units_file - Uses the json_root buffer on each run to append intact Units as they're
 /// deserialized from the provided file.
 ///
-/// \param filename - The file to pull the JSON-formatted units from.
+/// \param units_path - The file to pull the JSON-formatted units from.
 /// \param verbose - Whether to print verbose output to STDOUT.
-void Suite::load_units_file( std::string filename, bool verbose )
+void Suite::load_units_file( std::string units_path, bool verbose )
+{
+    std::vector<std::string> unit_files;
+
+    if ( is_dir( units_path ) )
+    {
+        // we have a directory path.  find all files ending in *.units and load them into a vector<std::string>
+        get_units_from_dir( &unit_files, units_path );
+    }
+
+    if ( is_file( units_path ) )
+    {
+        unit_files.push_back( units_path );
+    }
+
+    std::ostringstream infostring;
+    infostring << "Unit files found: " << unit_files.size() << std::endl;
+    syslog(LOG_INFO, infostring.str().c_str() );
+    std::cerr << infostring.str();
+
+    for ( int i = 0; i < unit_files.size(); i++ )
     {
         // will use json_root buffer on each run to append to this->units vector as valid units are found.
-    this->load_json_file( filename, verbose );
+        this->load_json_file( unit_files[i], verbose );
 
         // staging buffer
         Json::Value jbuff;
 
-    // fill the jbuff staging buffer with a json::value object in the supplied filename
+        // fill the jbuff staging buffer with a json::value object in the supplied units_path
         if ( this->get_serialized( jbuff, "units", verbose ) == 0)
         {
             this->json_root = jbuff;
@@ -72,12 +179,19 @@ void Suite::load_units_file( std::string filename, bool verbose )
                 // append to this->units
                 this->units.push_back( tmp_U );
                 if ( verbose ) {
-                std::cout << "Added unit \"" << tmp_U.get_name() << "\" to Suite." << std::endl;
+                    std::ostringstream infostring;
+                    infostring << "Added unit \"" << tmp_U.get_name() << "\" to Suite." << std::endl;
+                    syslog(LOG_INFO, infostring.str().c_str() );
+                    std::cout << infostring.str();
                 }
             }
         }
     }
 
+
+
+}
+
 /// Suite::get_unit - returns a contained Unit identified by name attribute.
 ///
 /// \param result - the unit type receiving the unit's value
@@ -99,8 +213,11 @@ void Suite::get_unit(Unit & result, std::string provided_name)
 
     if (! foundMatch )
     {
-        std::cerr << "Unit name \"" << provided_name << "\" was referenced but not defined!" << std::endl;
-        throw Suite_InvalidUnitMember();
+        std::ostringstream infostring;
+        infostring << "Unit name \"" << provided_name << "\" was referenced but not defined!" << std::endl;
+        syslog(LOG_ERR, infostring.str().c_str() );
+        std::cerr << infostring.str();
+        throw SuiteException( infostring.str() );
     }
 }