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interface_xml.c
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/* #############################################################################
* interface to the xml library
* #############################################################################
* Copyright (C) 2005-2009 Harry Brueckner
*
* This program 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 any later version.
* This program 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
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Contact: Harry Brueckner <[email protected]>
* Muenchener Strasse 12a
* 85253 Kleinberghofen
* Germany
* #############################################################################
*/
/* #############################################################################
* includes
*/
#include "cpm.h"
#include <pwd.h>
#include <time.h>
#include "configuration.h"
#include "general.h"
#include "interface_utf8.h"
#include "interface_xml.h"
#include "listhandler.h"
#include "memory.h"
#include "patternparser.h"
#include "string.h"
#include "xml.h"
/* #############################################################################
* internal functions
*/
void createEditorsNode(void);
void createTemplateNode(void);
int editorAdd(xmlChar* editor);
char* editorFindById(int uid);
int editorFindByName(char* editor);
static int nodeSort(const void* node1, const void* node2);
xmlNode* nodeFind(char* label);
/* #############################################################################
* global variables
*/
xmlNode** xmlwalklist;
xmlNode* editorsnode;
xmlNode* templatenode;
int level = 0,
maxeditor = 0,
maxlevel = 0;
/* Flawfinder: ignore */
char staticlabel[128];
/* #############################################################################
*
* Description find the editors node or create a new one of it doesn't exist
* Author Harry Brueckner
* Date 2005-04-06
* Arguments void
* Return void
*/
void createEditorsNode(void)
{
xmlNode* curnode;
xmlNode* rootnode;
char* prop;
TRACE(99, "createEditorsNode()", NULL);
/* we walk along the root node to find the template node */
rootnode = xmlGetDocumentRoot();
curnode = rootnode -> children;
while (curnode)
{
if (curnode -> type == XML_ELEMENT_NODE &&
!strcmp((char*)curnode -> name, "editor"))
{
editorsnode = curnode;
break;
}
curnode = curnode -> next;
}
if (!editorsnode)
{
/* we add the default editors structure */
editorsnode = xmlNewChild(rootnode,
NULL,
BAD_CAST "editor",
NULL);
if (!editorsnode)
{
fprintf(stderr,
_("XML error: can not create XML structure (line %d)."),
__LINE__);
exit(1);
}
xmlSetCreation(editorsnode);
editorAdd(convert2xml("unknown"));
}
/* we find the current maximum for uid */
maxeditor = 0;
curnode = editorsnode -> children;
while (curnode)
{
if (curnode -> type == XML_ELEMENT_NODE &&
!strcmp((char*)curnode -> name, "user"))
{
prop = convert2terminal(xmlGetProp(curnode, BAD_CAST "uid"));
if (prop)
{ /* we found a user */
/* Flawfinder: ignore */
maxeditor = max(maxeditor, atoi(prop));
}
}
curnode = curnode -> next;
}
}
/* #############################################################################
*
* Description find the template node or create a new one of it doesn't exist
* Author Harry Brueckner
* Date 2005-03-29
* Arguments void
* Return void
*/
void createTemplateNode(void)
{
xmlNode* curnode;
xmlNode* rootnode;
TRACE(99, "createTemplateNode()", NULL);
/* we walk along the root node to find the template node */
rootnode = xmlGetDocumentRoot();
curnode = rootnode -> children;
while (curnode)
{
if (curnode -> type == XML_ELEMENT_NODE &&
!strcmp((char*)curnode -> name, "template"))
{
templatenode = curnode;
break;
}
curnode = curnode -> next;
}
if (!templatenode)
{
/* we add the default template structure */
templatenode = xmlNewChild(rootnode,
NULL,
BAD_CAST "template",
NULL);
if (!templatenode)
{
fprintf(stderr,
_("XML error: can not create XML structure (line %d)."),
__LINE__);
exit(1);
}
xmlSetCreation(templatenode);
}
}
/* #############################################################################
*
* Description add a new editor
* Author Harry Brueckner
* Date 2005-04-06
* Arguments xmlChar* editor - name of the editor
* NOTE: This must already be UTF-8!
* Return int user id of the editor
*/
int editorAdd(xmlChar* editor)
{
xmlNode* curnode;
int curuid;
/* Flawfinder: ignore */
char uid[10];
TRACE(99, "editorAdd()", NULL);
if (!editorsnode)
{ createEditorsNode(); }
curuid = editorFindByName((char*)editor);
if (curuid != -1)
{ return curuid; }
snprintf(uid, 10, "%d", ++maxeditor);
curnode = xmlNewChild(editorsnode,
NULL,
BAD_CAST "user", editor);
if (!curnode)
{
fprintf(stderr, _("XML error: can not create XML structure (line %d)."),
__LINE__);
exit(1);
}
xmlNewProp(curnode, BAD_CAST "uid", convert2xml(uid));
xmlSetCreation(curnode);
return maxeditor;
}
/* #############################################################################
*
* Description find an editor by his user id
* Author Harry Brueckner
* Date 2005-04-06
* Arguments int uid - user id of the editor
* Return char* name of the editor
*/
char* editorFindById(int uid)
{
xmlNode* curnode;
char* prop;
char* result;
char* user;
TRACE(99, "editorFindById()", NULL);
if (!editorsnode)
{ createEditorsNode(); }
if (uid < 1 || uid > maxeditor)
{ return NULL; }
curnode = editorsnode -> children;
while (curnode)
{
if (curnode -> type == XML_ELEMENT_NODE &&
!strcmp((char*)curnode -> name, "user"))
{
prop = convert2terminal(xmlGetProp(curnode, BAD_CAST "uid"));
if (prop)
{ /* we found a user */
/* Flawfinder: ignore */
if (uid == atoi(prop))
{
user = convert2terminal(xmlNodeGetContent(curnode));
result = memAlloc(__FILE__, __LINE__, strlen(user) + 1);
strStrncpy(result, user, strlen(user) + 1);
return result;
}
}
}
curnode = curnode -> next;
}
return NULL;
}
/* #############################################################################
*
* Description find an editor by his name
* Author Harry Brueckner
* Date 2005-04-06
* Arguments char* editor - name of the editor
* Return int user id of the editor
*/
int editorFindByName(char* editor)
{
xmlNode* curnode;
int uid;
char* prop;
char* user;
TRACE(99, "editorFindByName()", NULL);
if (!editorsnode)
{ createEditorsNode(); }
if (!editor)
{ return editorFindByName("unknown"); }
curnode = editorsnode -> children;
while (curnode)
{
if (curnode -> type == XML_ELEMENT_NODE &&
!strcmp((char*)curnode -> name, "user"))
{
user = convert2terminal(xmlNodeGetContent(curnode));
if (!strcmp(user, editor))
{ /* we found the user */
prop = convert2terminal(xmlGetProp(curnode, BAD_CAST "uid"));
if (prop)
{ /* we found a user */
/* Flawfinder: ignore */
uid = atoi(prop);
if (uid > 0)
{ return uid; }
else
{ return -1; }
}
}
}
curnode = curnode -> next;
}
return -1;
}
/* #############################################################################
*
* Description free the XML parser stuff
* Author Harry Brueckner
* Date 2005-03-18
* Arguments void
* Return void
*/
void freeXMLInterface(void)
{
TRACE(99, "freeXMLInterface()", NULL);
if (xmlwalklist)
{
memFree(__FILE__, __LINE__, xmlwalklist, maxlevel * sizeof(xmlNode*));
xmlwalklist = NULL;
}
}
/* #############################################################################
*
* Description initialize the XML parser
* Author Harry Brueckner
* Date 2005-03-18
* Arguments void
* Return void
*/
void initXMLInterface(void)
{
TRACE(99, "initXMLInterface()", NULL);
level = 0;
maxlevel = 0;
editorsnode = NULL;
templatenode = NULL;
xmlwalklist = NULL;
}
/* #############################################################################
*
* Description see if a node witht the passed label exists in the current
* node
* Author Harry Brueckner
* Date 2005-03-29
* Arguments char* label - label of the node to find
* Return xmlNode* pointing to the found node
*/
xmlNode* nodeFind(char* label)
{
xmlNode* curnode;
char* prop;
TRACE(99, "nodeFind()", NULL);
if (!level || !label)
{ return 0; }
curnode = xmlwalklist[level - 1] -> children;
while (curnode)
{
if (curnode -> type == XML_ELEMENT_NODE &&
!strcmp((char*)curnode -> name, "node"))
{
prop = convert2terminal(xmlGetProp(curnode, BAD_CAST "label"));
if (prop &&
!strcmp(label, prop))
{ /* we found the label */
return curnode;
}
}
curnode = curnode -> next;
}
return NULL;
}
/* #############################################################################
*
* Description qsort function to sort the node names
* Author Harry Brueckner
* Date 2005-03-27
* Arguments const void* node1 - label of node 1
* const void* node2 - label of node 2
* Return strcmp result of the names
*/
static int nodeSort(const void* node1, const void* node2)
{
char** label1 = (char**)node1;
char** label2 = (char**)node2;
TRACE(99, "nodeSort()", NULL);
return strcmp(label1[0], label2[0]);
}
/* #############################################################################
*
* Description add a new node to the current one
* Author Harry Brueckner
* Date 2005-03-24
* Arguments char* label - label of the new node
* Return void
*/
void xmlInterfaceAddNode(char* label)
{
xmlNode* node;
TRACE(99, "xmlInterfaceAddNode()", NULL);
node = xmlNewChild(xmlwalklist[level - 1],
NULL,
BAD_CAST "node",
BAD_CAST "");
if (!node)
{
fprintf(stderr, _("XML error: can not create XML structure (line %d)."),
__LINE__);
exit(1);
}
xmlNewProp(node, BAD_CAST "label", convert2xml(label));
xmlSetCreation(node);
}
/* #############################################################################
*
* Description delete a node from the current one
* Author Harry Brueckner
* Date 2005-03-29
* Arguments char* label - label of the node
* Return void
*/
void xmlInterfaceDeleteNode(char* label)
{
xmlNode* node;
TRACE(99, "xmlInterfaceDeleteNode()", NULL);
node = nodeFind(label);
if (!node)
{ return; }
xmlUnlinkNode(node);
}
/* #############################################################################
*
* Description edit the label of a node
* Author Harry Brueckner
* Date 2005-03-29
* Arguments char* label_old - old label of the node
* char* label_new - new label of the node
* Return void
*/
void xmlInterfaceEditNode(char* label_old, char* label_new)
{
xmlNode* node;
TRACE(99, "xmlInterfaceEditNode()", NULL);
node = nodeFind(label_old);
if (!node)
{ return; }
xmlSetProp(node, BAD_CAST "label", convert2xml(label_new));
xmlSetModification(node);
}
/* #############################################################################
*
* Description free a list of node names
* Author Harry Brueckner
* Date 2005-03-27
* Arguments char** array of node names
* Return void
*/
void xmlInterfaceFreeNames(char** list)
{
TRACE(99, "xmlInterfaceFreeNames()", NULL);
listFree(list);
}
/* #############################################################################
*
* Description get the comment of a node
* Author Harry Brueckner
* Date 2005-04-05
* Arguments char* label - label of the node
* Return char* containing the data
*/
char* xmlInterfaceGetComment(char* label)
{
xmlNode* commentnode = NULL;
xmlNode* curnode;
xmlNode* node;
char* comment;
char* result;
TRACE(99, "xmlInterfaceGetComment()", NULL);
node = nodeFind(label);
if (!node)
{ return NULL; }
curnode = node -> children;
while (curnode)
{
if (curnode -> type == XML_ELEMENT_NODE &&
!strcmp((char*)curnode -> name, "comment"))
{ /* we found our comment node, there can only be one */
commentnode = curnode;
break;
}
curnode = curnode -> next;
}
if (!commentnode)
{ return NULL; }
comment = convert2terminal(xmlNodeGetContent(commentnode));
result = memAlloc(__FILE__, __LINE__, strlen(comment) + 1);
strStrncpy(result, comment, strlen(comment) + 1);
return result;
}
/* #############################################################################
*
* Description get the creation label of a node
* Author Harry Brueckner
* Date 2005-04-05
* Arguments char* label - label of the node
* char** by - the 'by' part of the label
* char** on - the 'on' part of the label
* Return char* containing the data
*/
void xmlInterfaceGetCreationLabel(char* label, char** by, char**on)
{
xmlNode* node;
char* propby;
char* propon;
TRACE(99, "xmlInterfaceGetCreationLabel()", NULL);
*by = NULL;
*on = NULL;
node = nodeFind(label);
if (!node)
{ return; }
propby = convert2terminal(xmlGetProp(node, BAD_CAST "created-by"));
if (!propby || !strlen(propby))
{ propby = "0"; }
/* Flawfinder: ignore */
*by = editorFindById(atoi(propby));
propon = convert2terminal(xmlGetProp(node, BAD_CAST "created-on"));
if (!propon)
{ propon = "---"; }
*on = memAlloc(__FILE__, __LINE__, strlen(propon) + 1);
strStrncpy(*on, propon, strlen(propon) + 1);
}
/* #############################################################################
*
* Description get the modification label of a node
* Author Harry Brueckner
* Date 2005-04-05
* Arguments char* label - label of the node
* char** by - the 'by' part of the label
* char** on - the 'on' part of the label
* Return char* containing the data
*/
void xmlInterfaceGetModificationLabel(char* label, char** by, char**on)
{
xmlNode* node;
char* propby;
char* propon;
TRACE(99, "xmlInterfaceGetModificationLabel()", NULL);
*by = NULL;
*on = NULL;
node = nodeFind(label);
if (!node)
{ return; }
propby = convert2terminal(xmlGetProp(node, BAD_CAST "modified-by"));
if (!propby || !strlen(propby))
{ propby = "0"; }
/* Flawfinder: ignore */
*by = editorFindById(atoi(propby));
propon = convert2terminal(xmlGetProp(node, BAD_CAST "modified-on"));
if (!propon)
{ propon = "---"; }
*on = memAlloc(__FILE__, __LINE__, strlen(propon) + 1);
strStrncpy(*on, propon, strlen(propon) + 1);
}
/* #############################################################################
*
* Description get all node names of the current node
* Author Harry Brueckner
* Date 2005-03-24
* Arguments void
* Return char** array of all nodes
*/
char** xmlInterfaceGetNames(void)
{
xmlNode* curnode;
xmlChar* prop;
char** list;
char* pconv;
int counter = 0,
i = 0;
TRACE(99, "xmlInterfaceGetNames()", NULL);
/* first we count how many children there are */
curnode = xmlwalklist[level - 1] -> children;
while (curnode)
{
if (curnode -> type == XML_ELEMENT_NODE &&
!strcmp((char*)curnode -> name, "node"))
{ counter++; }
curnode = curnode -> next;
}
if (!counter)
{ return NULL; }
/* then we allocate the memory */
list = memAlloc(__FILE__, __LINE__, (counter + 1) * sizeof(char*));
/* and finally we fill the array */
curnode = xmlwalklist[level - 1] -> children;
while (curnode)
{
if (curnode -> type == XML_ELEMENT_NODE &&
!strcmp((char*)curnode -> name, "node"))
{
prop = xmlGetProp(curnode, BAD_CAST "label");
if (prop)
{
pconv = convert2terminal(prop);
list[i] = memAlloc(__FILE__, __LINE__, strlen(pconv) + 1);
strStrncpy(list[i], pconv, strlen(pconv) + 1);
i++;
}
}
curnode = curnode -> next;
}
list[i] = NULL;
qsort(list, i, sizeof(char*), nodeSort);
return list;
}
/* #############################################################################
*
* Description add another node to the walk list
* Author Harry Brueckner
* Date 2005-03-24
* Arguments char* label - label of the node to find
* Return 0 if all is ok, 1 if the node name could not be found
*/
int xmlInterfaceNodeDown(char* label)
{
xmlNode* newnode;
TRACE(99, "xmlInterfaceNodeDown()", NULL);
if (!level)
{ /* we start out with the root node */
newnode = xmlGetDocumentRoot();
}
else
{ /* we have to look for a node by its label */
newnode = nodeFind(label);
}
if (!newnode)
{ return 1; }
if (++level > maxlevel)
{ /* reallocate as many pointers as needed at the moment */
xmlwalklist = memRealloc(__FILE__, __LINE__, xmlwalklist,
maxlevel * sizeof(xmlNode*),
level * sizeof(xmlNode*));
maxlevel = level;
}
xmlwalklist[level - 1] = newnode;
return 0;
}
/* #############################################################################
*
* Description see if a node witht the passed label exists in the current
* node
* Author Harry Brueckner
* Date 2005-03-29
* Arguments char* label - label of the node to find
* Return xmlNode* pointing to the found node
*/
int xmlInterfaceNodeExists(char* label)
{
TRACE(99, "xmlInterfaceNodeExists()", NULL);
if (nodeFind(label))
{ return 1; }
else
{ return 0; }
}
/* #############################################################################
*
* Description get the label of a node if in the walklist
* Author Harry Brueckner
* Date 2005-04-14
* Arguments int id - id of the node to get
* Return char* label of the node
*/
char* xmlInterfaceNodeGet(int id)
{
TRACE(99, "xmlInterfaceNodeGet()", NULL);
if (id < 1 ||
id >= level)
{ return NULL; }
return convert2terminal(xmlGetProp(xmlwalklist[id], BAD_CAST "label"));
}
/* #############################################################################
*
* Description remove one node from the walk list
* Author Harry Brueckner
* Date 2005-03-24
* Arguments void
* Return void
*/
void xmlInterfaceNodeUp(void)
{
TRACE(99, "xmlInterfaceNodeUp()", NULL);
if (level > 0 &&
xmlwalklist[level - 1])
{ xmlwalklist[level - 1] = NULL; }
if (level > 0)
{ level--; }
}
/* #############################################################################
*
* Description set a new comment
* Author Harry Brueckner
* Date 2005-04-05
* Arguments char* label - label of the node
* char* comment - the new comment
* Return void
*/
void xmlInterfaceSetComment(char* label, char* comment)
{
xmlNode* commentnode = NULL;
xmlNode* curnode;
xmlNode* node;
TRACE(99, "xmlInterfaceSetComment()", NULL);
node = nodeFind(label);
if (!node)
{ return; }
curnode = node -> children;
while (curnode)
{
if (curnode -> type == XML_ELEMENT_NODE &&
!strcmp((char*)curnode -> name, "comment"))
{ /* we found our comment node, there can only be one */
commentnode = curnode;
break;
}
curnode = curnode -> next;
}
if (commentnode)
{ /* if a comment exists, we update its modification */
if (strlen(comment) == 0)
{ /* if the comment is empty, we remove the node and are done */
xmlUnlinkNode(commentnode);
return;
}
xmlSetModification(commentnode);
}
else
{ /* otherwise we have to create a new comment first */
if (strlen(comment) == 0)
{ /* if there is no comment, we must not do anything */
return;
}
commentnode = xmlNewTextChild(node,
NULL,
BAD_CAST "comment",
convert2xml(comment));
if (!commentnode)
{
fprintf(stderr,
_("XML error: can not create XML structure (line %d)."),
__LINE__);
exit(1);
}
xmlSetCreation(commentnode);
}
/* update the comment node */
xmlNodeSetContent(commentnode,
xmlEncodeCommentEntities(convert2xml(comment)));
/* and its parent modification */
xmlSetModification(node);
}
/* #############################################################################
*
* Description get the template title of the current node
* Author Harry Brueckner
* Date 2005-03-29
* Arguments int id - the level of which we want the template of
* int is_static - flag to indicate if the found template is
* statically defined (either by the XML
* structure or by the configuration)
* Return char* string with the title of the template
*/
char* xmlInterfaceTemplateGet(int id, int* is_static)
{
xmlNode* curnode;
char* prop;
TRACE(99, "xmlInterfaceTemplateGet()", NULL);
*is_static = 1;
if (!templatenode)
{ createTemplateNode(); }
if (!templatenode)
{ return NULL; }
if (id == -1)
{ id = level; }
curnode = templatenode -> children;
while (curnode)
{
if (curnode -> type == XML_ELEMENT_NODE &&
!strcmp((char*)curnode -> name, "title"))
{
prop = convert2terminal(xmlGetProp(curnode, BAD_CAST "level"));
if (prop &&
/* Flawfinder: ignore */
atoi(prop) == id)
{ /* we found the title for the id */
return convert2terminal(xmlNodeGetContent(curnode));
}
}
curnode = curnode -> next;
}
if (config -> defaulttemplates &&
config -> defaulttemplates[id - 1])
{ /* we have a default template name */
return config -> defaulttemplates[id - 1];
}
*is_static = 0;
/* no default defined, so we use a dynamic default */
snprintf(staticlabel, 128, _("level %d"), id);
return staticlabel;
}
/* #############################################################################
*
* Description get the template id of the given template title
* Author Harry Brueckner
* Date 2005-04-12
* Arguments char* title - title of the template
* Return template id or -1 if the title is not found
*/
int xmlInterfaceTemplateGetId(char* title)
{
xmlNode* curnode;
int tid;
char* prop;
TRACE(99, "xmlInterfaceTemplateGetId()", NULL);
if (!templatenode)
{ createTemplateNode(); }
if (!templatenode)
{ return -1; }
curnode = templatenode -> children;
while (curnode)
{
if (curnode -> type == XML_ELEMENT_NODE &&
!strcmp((char*)curnode -> name, "title") &&
!strcmp(convert2terminal(xmlNodeGetContent(curnode)), title))
{ /* we found the title */
prop = convert2terminal(xmlGetProp(curnode, BAD_CAST "level"));
if (prop)
{
/* Flawfinder: ignore */
tid = atoi(prop);
if (tid > 0)
{ return tid; }
else
{ return -1; }
}
}
curnode = curnode -> next;
}
return -1;
}
/* #############################################################################
*
* Description set the template title of the current node
* Author Harry Brueckner
* Date 2005-03-24
* Arguments char* title - new title to set