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#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
}
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