--- parser3/src/classes/hashfile.C	2001/10/22 16:44:42	1.2
+++ parser3/src/classes/hashfile.C	2001/10/27 10:14:45	1.12
@@ -4,13 +4,13 @@
 	Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
 	Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
 
-	$Id: hashfile.C,v 1.2 2001/10/22 16:44:42 parser Exp $
+	$Id: hashfile.C,v 1.12 2001/10/27 10:14:45 paf Exp $
 */
 
 #include "pa_config_includes.h"
+#include "classes.h"
 #ifdef HAVE_LIBDB
 
-#include "classes.h"
 #include "pa_request.h"
 #include "pa_vhashfile.h"
 #include "pa_vhash.h"
@@ -33,47 +33,151 @@ public: // Methoded
 
 // methods
 
-static void _assign(Request& r, const String& method_name, MethodParams *params) {
+static void _open(Request& r, const String& method_name, MethodParams *params) {
+	Pool& pool=r.pool();
+	VHashfile& self=*static_cast<VHashfile *>(r.self);
+	
+	self.assign(
+		params->as_string(0, "DB_HOME must be string"), 
+		params->as_string(1, "filename must be string")
+	);
+}
+
+static void _transaction(Request& r, const String& method_name, MethodParams *params) {
+	Pool& pool=r.pool();
+	VHashfile& self=*static_cast<VHashfile *>(r.self);
+	
+	// body code
+	Value& body_code=params->as_junction(0, "body must be code");
+
+	// table
+	DB_Table_ptr table_ptr=self.get_table_ptr(&method_name);
+
+	// transaction
+	DB_Transaction transaction(pool, *table_ptr, self.current_transaction);
+
+	// execute body
+	try {
+		r.write_assign_lang(r.process(body_code));
+	} catch(...) { // process/commit problem
+		transaction.mark_to_rollback();
+		
+		/*re*/throw; 
+	}
+}
+
+static void _hash(Request& r, const String& method_name, MethodParams *params) {
 	Pool& pool=r.pool();
 	VHashfile& self=*static_cast<VHashfile *>(r.self);
 	
-	const String &sfile_spec=params->as_string(0, "filename must be string");
+	// write out result
+	VHash& result=*new(pool) VHash(pool, *self.get_hash(&method_name));
+	result.set_name(method_name);
+	r.write_no_lang(result);
+}
 
-	self.assign(r.absolute(sfile_spec), method_name);
+static void _cache(Request& r, const String& method_name, MethodParams *params) {
+	Pool& pool=r.pool();
+	VHashfile& self=*static_cast<VHashfile *>(r.self);
+	
+	// key, expires, body code
+	const String &key=params->as_string(0, "key must be string");
+	double expires=params->as_double(1, "expires must be number", r);
+	Value& body_code=params->as_junction(2, "body must be code");
+
+	// transaction
+	DB_Transaction transaction(pool, *self.get_table_ptr(&method_name), self.current_transaction);
+
+	// execute body
+	try {
+		if(expires) { // 'expires' specified? try cached copy...
+			if(String *cached_body=transaction.get(key)) { // have cached copy?
+				r.write_assign_lang(*cached_body);
+				// happy with it
+				return;
+			}
+		} else // 'expires'=0, forget cached copy
+			transaction.remove(key);
+
+		// save
+		Autosave_marked_to_cancel_cache saved(self);
+
+		// process
+		Value& processed_body=r.process(body_code);
+		r.write_assign_lang(processed_body);
+		
+		// put it to cache if 'expires' specified & never called ^delete[]
+		if(expires && !self.marked_to_cancel_cache())
+			transaction.put(key, processed_body.as_string(), time(0)+(time_t)expires);
+	} catch(...) { // process/commit problem
+		transaction.mark_to_rollback();
+		
+		/*re*/throw; 
+	}
+}
+
+static void _delete(Request& r, const String& method_name, MethodParams *params) {
+	Pool& pool=r.pool();
+	VHashfile& self=*static_cast<VHashfile *>(r.self);
+	
+	if(params->size()==0)
+		self.mark_to_cancel_cache();
+	else {
+		// key
+		const String &key=params->as_string(0, "key must be string");
+		// remove
+		self.get_table_ptr(&method_name)->remove(self.current_transaction, key);
+	}
+}
+
+static void _clear(Request& r, const String& method_name, MethodParams *) {
+	Pool& pool=r.pool();
+	VHashfile& self=*static_cast<VHashfile *>(r.self);
+	DB_Cursor cursor(
+		*self.get_table_ptr(&method_name), 
+		self.current_transaction, &method_name);
+
+	while(true) {
+		if(!cursor.move(DB_NEXT))
+			break;
+
+		cursor.remove(0/*flags*/);
+	}
 }
-//static_cast<VHashfile *>(r.self)	const String& file_spec=->file_spec();
 
 // constructor
 
 MHashfile::MHashfile(Pool& apool) : Methoded(apool) {
 	set_name(*NEW String(pool(), HASH_CLASS_NAME));
 
-	// ^hashfile::assign[filename]
-	add_native_method("assign", Method::CT_DYNAMIC, _assign, 1, 1);
-/*
+	// ^hashfile::open[db_home;filename]
+	add_native_method("open", Method::CT_DYNAMIC, _open, 2, 2);
+	// ^transaction{code}
+	add_native_method("transaction", Method::CT_DYNAMIC, _transaction, 1, 1);
+	// ^hash[]
+	add_native_method("hash", Method::CT_DYNAMIC, _hash, 0, 0);
+	// ^cache[key](seconds){code}
+	add_native_method("cache", Method::CT_DYNAMIC, _cache, 3, 3);
 	// ^hashfile.delete[key]
-	add_native_method("delete", Method::CT_DYNAMIC, _delete, 1, 1);
+	add_native_method("delete", Method::CT_DYNAMIC, _delete, 0, 1);
 	// ^hashfile.clear[]
 	add_native_method("clear", Method::CT_DYNAMIC, _clear, 0, 0);
-	// ^cache[key](seconds){code}
-	add_native_method("cache", Method::CT_DYNAMIC, _cache, 3, 3);
-	// ^cancel[]
-	add_native_method("cancel", Method::CT_DYNAMIC, _cancel, 0, 0);
-	// ^lock{code}
-	add_native_method("lock", Method::CT_DYNAMIC, _lock, 1, 1);
-	// ^pack[]
-	add_native_method("pack", Method::CT_DYNAMIC, _pack, 0, 0);
-	*/
 }
 
 // global variable
 
 Methoded *hashfile_base_class;
 
+#endif
+
 // creator
 
 Methoded *MHashfile_create(Pool& pool) {
-	return hashfile_base_class=new(pool) MHashfile(pool);
-}
-
+	return 
+#ifdef HAVE_LIBDB
+		hashfile_base_class=new(pool) MHashfile(pool)
+#else
+		0
 #endif
+	;
+}