Function msOWSRequestLayersEnabled

mapows.c:260–322

** msOWSRequestLayersEnabled() ** ** Check if the layers are visible for a specific OWS request. ** ** 'namespaces' is a string with a letter for each namespace to lookup ** in the order they should be looked up. e.g. "MO" to lookup wms_ and ows_ ** If namespaces is NULL then this function just does a regular metadata ** lookup. ** ** Generates an array of the layer ids enabled. */

** Generates an array of the layer ids enabled.
*/
void msOWSRequestLayersEnabled(mapObj *map, const char *namespaces, 
                               const char *request, owsRequestObj *ows_request)
{
    int disabled = MS_FALSE; /* explicitly disabled flag */
    int globally_enabled = MS_FALSE;
    const char *enable_request;

    if (ows_request->numlayers > 0) 
        msFree(ows_request->enabled_layers);
    
    ows_request->numlayers = 0;
    ows_request->enabled_layers = NULL;

    if (request == NULL || (map == NULL) || (map->numlayers <= 0))
        return;

    enable_request = msOWSLookupMetadata(&map->web.metadata, namespaces, "enable_request");
    globally_enabled = msOWSParseRequestMetadata(enable_request, request, &disabled);

    if (!globally_enabled && !disabled)
    {
        enable_request = msOWSLookupMetadata(&map->web.metadata, "O", "enable_request");
        globally_enabled = msOWSParseRequestMetadata(enable_request, request, &disabled);
    }

    if (map->numlayers)
    {
        int i, layers_size = map->numlayers; //for most of cases, this will be relatively small

        ows_request->enabled_layers = (int*)msSmallMalloc(sizeof(int)*layers_size);

        for(i=0; i<map->numlayers; i++)
        {
            int result = MS_FALSE;
            layerObj *lp;
            lp = (GET_LAYER(map, i));

            enable_request = msOWSLookupMetadata(&lp->metadata, namespaces, "enable_request");
            result = msOWSParseRequestMetadata(enable_request, request, &disabled);
            if (!result && disabled) continue; /* if the request has been explicitly set to disabled, continue */
            
            if (!result && !disabled) /* if the request has not been found in the wms metadata, */
            {                         /* check the ows namespace  */
            
                enable_request = msOWSLookupMetadata(&lp->metadata, "O", "enable_request");
                result = msOWSParseRequestMetadata(enable_request, request, &disabled);
                if (!result && disabled) continue;
            }
            
            if (result || (!disabled && globally_enabled))
            {
                ows_request->enabled_layers[ows_request->numlayers] = lp->index;
                ows_request->numlayers++;
            }
        }

        if (ows_request->numlayers == 0) 
        {