objects.h

#include <stdlib.h>

#define TWEET_LENGTH 280
#define USERNAME_LENGTH 100
#define FOLLOW_MAX 30

#ifndef OBJECTS
#define OBJECTS

typedef struct tweet {
    size_t userID; /* unique ID of tweet's author in userlist */
    char tweetAuthor[USERNAME_LENGTH]; /* While storing the tweet's author here does waste memory, it makes it much easier to access. */
    char tweet[TWEET_LENGTH];
} tweet;

typedef struct user {
    char username[USERNAME_LENGTH];
    size_t userID;
    size_t followers[FOLLOW_MAX]; /* collection of userID's */
    size_t follower_count;        /* need to check if < FOLLOW_MAX before adding to followers[] */
    size_t following[FOLLOW_MAX];
    size_t following_count;
} user;

typedef struct TweetNode {
    tweet tweet;
    struct TweetNode *next; /* link to previously most recent tweet */
} TweetNode;

typedef struct UserNode {
    user *user;
    struct UserNode *next;
    struct UserNode *previous;
} UserNode;

typedef struct twitter {
    UserNode *userlist; /* start of userlist */
    size_t user_count;
    UserNode *current_user;       /* pointer to current usernode */
    TweetNode *most_recent_tweet; /* Probably want to change the name
   of this (start of the linked list) */
} twitter;

#endif