dav/scfg.c

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2013 Olaf Wintermann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <libidav/utils.h>
#include <ucx/map.h>

#include "scfg.h"

#define xstreq(a,b) xmlStrEqual(BAD_CAST a, BAD_CAST b)

#ifdef _WIN32
#define ENV_HOME getenv("USERPROFILE")
#else
#define ENV_HOME getenv("HOME")
#endif /* _WIN32 */

static UcxMap *directories;

int load_sync_config() {
    char *file = util_concat_path(ENV_HOME, ".dav/sync.xml");
    xmlDoc *doc = xmlReadFile(file, NULL, 0);
    if(!doc) {
        fprintf(stderr, "Missing configuration file\n");
        scfg_print_example();
        return -1;
    }
    
    directories = ucx_map_new(8);
    
    int ret = 0;
    xmlNode *node = xmlDocGetRootElement(doc)->children;
    while(node) {
        if(node->type == XML_ELEMENT_NODE) {
            if(xstreq(node->name, "directory")) {
                if(scfg_load_directory(node)) {
                    ret = 1;
                    ucx_map_free(directories);
                    break;
                }
            }
        }
        node = node->next;
    }
    
    xmlFreeDoc(doc);
    
    return ret;
}

int scfg_load_directory(xmlNode *node) {
    char *name = NULL;
    char *path = NULL;
    char *repository = NULL;
    char *database = NULL;
    
    node = node->children;
    while(node) {
        if(node->type == XML_ELEMENT_NODE) {
            char *value = util_xml_get_text(node);
            if(!value) {
                // next
            } else if(xstreq(node->name, "name")) {
                name = value;
            } else if(xstreq(node->name, "path")) {
                path = value;
            } else if(xstreq(node->name, "repository")) {
                repository = value;
            } else if(xstreq(node->name, "database")) {
                database = value;
            }
        }
        node = node->next;
    }
    
    if(!name) {
        fprintf(stderr, "Missing name element for directory\n");
        return -1;
    }
    if(!path) {
        fprintf(stderr, "Missing path element for directory\n");
        return -1;
    }
    if(!repository) {
        fprintf(stderr, "Missing repository element for directory\n");
        return -1;
    }
    if(!database) {
        fprintf(stderr, "Missing database element for directory\n");
        return -1;
    }
    
    SyncDirectory *dir = malloc(sizeof(SyncDirectory));
    dir->name = strdup(name);
    dir->path = strdup(path);
    dir->repository = strdup(repository);
    dir->database = strdup(database);
    
    ucx_map_cstr_put(directories, name, dir);
    
    return 0;
}

void scfg_print_example() {
    fprintf(stderr, "example sync.xml\n\n");
    fprintf(stderr, "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>\n");
    fprintf(stderr, "<configuration>\n");
    fprintf(stderr, "  <directory>\n");
    fprintf(stderr, "    <!-- identifier -->\n");
    fprintf(stderr, "    <name>documents</name>\n\n");
    fprintf(stderr, "    <!-- local path to the directory -->\n");
    fprintf(stderr, "    <path>/home/user/Documents</path>\n\n");
    fprintf(stderr, "    <!-- repository name specified in config.xml -->\n");
    fprintf(stderr, "    <repository>server</repository>\n\n");
    fprintf(stderr, "    <!-- database file name -->\n");
    fprintf(stderr, "    <database>documents.db</database>\n");
    fprintf(stderr, "  </directory>\n");
    fprintf(stderr, "</configuration>\n");
}

SyncDirectory* scfg_get_dir(char *name) {
    return ucx_map_cstr_get(directories, name);
}