// This file is under GNU General Public License 3.0

// see LICENSE.txt

#include "pEp_internal.h"

#include "resource_id.h"

pEp_rid_list_t* new_rid_node(pEp_resource_id_type type, const char* resource) {

    assert(resource);

    if (!resource)

        return NULL;

    pEp_rid_list_t* retval = (pEp_rid_list_t*)calloc(1, sizeof(pEp_rid_list_t));

    assert(retval);

    if (!retval)

        return NULL;

    retval->rid_type = type;

    retval->rid = strdup(resource);

    assert(retval->rid);

    if (!retval->rid) {

        free(retval);

        return NULL;

    }

    return retval;

}

void free_rid_list(pEp_rid_list_t* list) {

    while (list) {

        pEp_rid_list_t* nextptr = list->next;

        free(list->rid);

        free(list);

        list = nextptr;

    }

}

const char* get_resource_ptr_noown(const char* uri) {

    char* uri_delim = strstr(uri, "://");

    if (!uri_delim)

        return uri;

    else

        return uri_delim + 3;

}

char* get_resource(char* uri) {

    const char* resource_ptr = get_resource_ptr_noown(uri);

    char* resource_str = NULL;

    if (resource_ptr)

        resource_str = strdup(resource_ptr);

    return resource_str;

}

bool is_file_uri(char* str) {

    return(!str ? false : strncmp(str, "file://", 7) == 0);

}

bool is_cid_uri(const char* str) {

    return(!str ? false : strncmp(str, "cid://", 6) == 0);

}

pEp_rid_list_t* parse_uri(const char* uri) {

    if (!uri)

        return NULL;

    pEp_resource_id_type type = (is_cid_uri(uri) ? PEP_RID_CID : PEP_RID_FILENAME);

    const char* resource = get_resource_ptr_noown(uri);

    return new_rid_node(type, resource);

}

char* build_uri(const char* uri_prefix, const char* resource) {

    if (!uri_prefix || !resource)

        return NULL;

    const char* delim = "://";

    const int delim_len = 3;

    int prefix_len = strlen(uri_prefix);

    int resource_len = strlen(resource);

    int retval_len = prefix_len + delim_len + resource_len;

    char* retval = calloc(1, retval_len + 1);

    strlcpy(retval, uri_prefix, retval_len + 1);

    strlcat(retval, delim, retval_len + 1);

    strlcat(retval, resource, retval_len + 1);

    return retval;

}