Made template parser

1 files changed, 223 insertions, 0 deletions

diff --git a/server/src/templateparser.cc b/server/src/templateparser.cc
new file mode 100644
index 0000000..1e6ddc7
--- /dev/null
+++ b/server/src/templateparser.cc
@@ -0,0 +1,223 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            templateparser.cc
+ *
+ *  Mon May 12 08:36:24 CEST 2008
+ *  Copyright 2008 Bent Bisballe Nyeng, Lars Bisballe Jensen and Peter Skaarup
+ *  deva@aasimon.org, elsenator@gmail.com and piparum@piparum.dk
+ ****************************************************************************/
+
+/*
+ *  This file is part of Pracro.
+ *
+ *  Pracro is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Pracro is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Pracro; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include "templateparser.h"
+
+// For assert
+#include <assert.h>
+
+// For open and friends
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+// For vprintf and friends
+#include <stdarg.h>
+
+void TemplateParser::error(char* fmt, ...)
+{
+  // TODO: Throw exception here.
+
+  fprintf(stderr, "Error in TemplateParser: ");
+
+  va_list argp;
+  va_start(argp, fmt);
+  vfprintf(stderr, fmt, argp);
+  va_end(argp);
+
+  fprintf(stderr, "\n");
+}
+
+TemplateParser::TemplateParser(std::string templatefile)
+{
+  state = UNDEFINED;
+  t = NULL;
+  current_macro = NULL;
+  current_map = NULL;
+  fd = open(templatefile.c_str(), O_RDONLY);
+  if(fd == -1) error("Could not open file %s", templatefile.c_str());
+}
+
+TemplateParser::~TemplateParser()
+{
+  if(fd != -1) close(fd);
+}
+
+void TemplateParser::startTag(std::string name, std::map< std::string, std::string> attributes)
+{
+  // Create template and enable parsing of macrosequences
+  if(name == "template") {
+    if(state != UNDEFINED) error("template found not in outer level.");
+    state = TEMPLATE;
+
+    assert(!t); // A Template has already been allocated!
+
+    t = new Template();
+    t->attributes = attributes;
+
+    return;
+  }
+
+  // Enable macro parsing
+  if(name == "macrosequence") {
+    if(state != TEMPLATE) error("macrosequence found outside template.");
+    state = MACROSEQUENCE;
+
+    assert(t); // A Template has not yet been allocated, cannot create macrosequence!
+
+    t->macrosequence.attributes = attributes;
+
+    return;
+  }
+
+  // Create macro and enable parsing of queries, maps and window
+  if(name == "macro") {
+    if(state != MACROSEQUENCE) error("macro found outside macrosequence.");
+    state = MACRO;
+
+    assert(t); // A Template has not yet been allocated, cannot create macro!
+    
+    Macro m;
+    m.attributes = attributes;
+    t->macrosequence.macroes.push_back(m);
+    current_macro = &(t->macrosequence.macroes.back());
+
+    return;
+  }
+
+  // Enable Query parsing
+  if(name == "queries") {
+    if(state != TEMPLATE) error("queries found outside template.");
+    state = QUERIES;
+    
+    assert(current_macro); // No macro is currently available, cannot create queries!
+
+    return;
+  }
+
+  // Create Query
+  if(name == "query") {
+    if(state != QUERIES) error("query found outside queries.");
+    state = QUERY;
+
+    assert(current_macro); // No macro is currently available, cannot create query!
+
+    Query q;
+    q.attributes = attributes;
+    current_macro->queries.push_back(q);
+
+    return;
+  }
+
+  // Enable Map parsing
+  if(name == "maps") {
+    if(state != TEMPLATE) error("maps found outside template.");
+    state = MAPS;
+
+    assert(current_macro); // No macro is currently available, cannot create maps!
+
+    return;
+  }
+
+  // Create Query
+  if(name == "map") {
+    if(state != MAPS) error("map found outside maps.");
+    state = MAP;
+
+    assert(current_macro); // No macro is currently available, cannot create map!
+
+    Map m;
+    m.attributes = attributes;
+    current_macro->maps.push_back(m);
+
+    return;
+  }
+
+  // Enable widget parsing
+  if(name == "window") {
+    if(state != TEMPLATE) error("window found outside template.");
+    state = WINDOW;
+
+    assert(current_macro); // No macro is currently available, cannot create window!
+  
+    current_macro->window.attributes = attributes;
+    widgetstack.push_back(&(current_macro->window));
+
+    return;
+  }
+
+  // TODO: We need to parse some (maybe even all) widgets in order to
+  //       make db lookup of the previous values.
+  if(state == WINDOW) {
+
+    assert(widgetstack.size()); // Widget stack is empty, cannot create!
+
+    Widget w;
+    w.attributes = attributes;
+    widgetstack.back()->widgets.push_back(w);
+    widgetstack.push_back(&(widgetstack.back()->widgets.back()));
+
+    return;
+  }
+
+
+  // Handle include
+  if(name == "include") {
+    return;
+  }
+
+  error("Unknown/illegal tag: %s", name.c_str());
+}
+
+void TemplateParser::endTag(std::string name)
+{
+  if(name == "template") state = UNDEFINED;
+  if(name == "macrosequence") state = TEMPLATE;
+  if(name == "macro") state = MACROSEQUENCE;
+  if(name == "queries") state = MACRO;
+  if(name == "query") state = QUERIES;
+  if(name == "maps") state = MACRO;
+  if(name == "map") state = MAPS;
+  if(name == "window") state = MACRO;
+  
+  if(state == WINDOW) {
+     assert(widgetstack.size()); // Widget stack is empty, cannot pop!
+     widgetstack.pop_back();
+  }
+
+}
+
+int TemplateParser::readData(char *data, size_t size)
+{
+  if(fd == -1) return 0;
+  return read(fd, data, size);
+}
+
+Template *TemplateParser::getTemplate()
+{
+  return t;
+}