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

#include "gui.h"


// https://www.rfc-editor.org/rfc/rfc6121#section-2.1.2.5
typedef enum {
	SUB_NONE,
	SUB_TO,
	SUB_FROM,
	SUB_BOTH
} subscription_t;

typedef struct _roster_item_t {
	const char* name;
	const char* jid;
	subscription_t sub;
	void* widget;  // GUI widget as generic void*
	struct _roster_item_t* next;
} roster_item_t;


// the RAM-stored data payload
static roster_item_t* roster = NULL;


void add_roster_item(const char* jid, const char* subscription, const char* name) {

	// parse roster item
	roster_item_t* item = malloc(sizeof(roster_item_t));
	item->name = name;
	item->jid = jid;
	if (strcmp(subscription, "none") == 0) {
		item->sub = SUB_NONE;
	} else if (strcmp(subscription, "to") == 0) {
		item->sub = SUB_TO;
	} else if (strcmp(subscription, "from") == 0) {
		item->sub = SUB_FROM;
	} else if (strcmp(subscription, "both") == 0) {
		item->sub = SUB_BOTH;
	} else {
		printf("Invalid subscription '%s'!\n", subscription);
		return;
	}
	item->next = NULL;

	// add item to roster datastructure
	if (roster == NULL) {
		roster = item;
	} else {
		roster_item_t* current = roster;
		while (current->next != NULL)     // loop until end of linked list
			current = current->next;
		current->next = item;
	}

	// notify GUI
	void* widget = gui_add_roster_item(jid, subscription, name);
	item->widget = widget;  // adds pointer to GUI widget to roster_item_t

}