Started working on receiving messages

main.c

@@ -93,6 +93,8 @@ int main() {
 						strcat(data, buffer);
 					}
 					strcat(data,"\0"); 
+
+					if (strcmp(strtok(data," \r\n"), "SENDING") == 0) {
 						if (from_user[i] == NULL) {
 							from_user[i] = fetch_user(fetch_from_string(data,"IAM"));
 							if (from_user[i] == NULL) {
@@ -133,7 +135,51 @@ int main() {
 	
 						printf("Message has been pushed onto stack for %s\n",to_user[i]->username);
 	
+					} else if (strcmp(strtok(buffer," \r\n"), "SENDING") == 0) {
+
+                                                if (from_user[i] == NULL) {
+                                                        from_user[i] = fetch_user(fetch_from_string(data,"IAM"));
+                                                        if (from_user[i] == NULL) {
+                                                                printf("Please identify yourself.\n");
+                                                                close(conn_sockets[i]);
+                                                                continue;
+                                                        } else {
+                                                                printf("You are %s\n",from_user[i]->username);
+                                                        }
+                                                }
+
+						int num_of_messages;
+						char* num_of_messages_string = fetch_from_string(data,"GETLAST");
 
+						if (num_of_messages_string == NULL) {
+							printf("Invalid GET request.\n");
+							return -30;
+						} else {
+							if (strstr(num_of_messages_string,"ALL") == 0) {
+								num_of_messages = stack_size(message_stack[user_to_index(from_user[i])]);
+							} else {
+								num_of_messages = atoi(num_of_messages_string);
+							}
+						}
+
+						if (num_of_messages > stack_size(message_stack[user_to_index(from_user[i])])) {
+							num_of_messages = stack_size(message_stack[user_to_index(from_user[i])]);
+						}
+							
+						for (int i=0;i<num_of_messages;i++) {
+							Message* message = stack_pop(message_stack[user_to_index(from_user[i])]);
+							printf("You have a message from %s"
+								", sent at %s"
+								": \"%s\"\n",
+								message->sender->username,
+								asctime(message->timeinfo),
+								message->text);
+						}
+						
+
+					} else {
+						printf("You are not sending or receiving.\n");
+					}
 
 					close(conn_sockets[i]);