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#include <mongoose.h>
#define STB_DS_IMPLEMENTATION
#include <stb_ds.h>
#define NAME_LEN 32
#define CONTENT_LEN 1024
#define HTML_LEN 1024*8
typedef struct post Post;
typedef struct user User;
User * UsersFind(struct mg_str name);
// Post
struct post {
time_t timestamp;
User * user;
char content[CONTENT_LEN];
};
// User
struct user {
char name[NAME_LEN];
Post * posts;
User ** following;
};
User
UserNew(const char * name) {
User result;
strcpy(result.name, name);
result.posts = NULL;
result.following = NULL;
return result;
}
void
UserWrite(User * user) {
char filename[128];
snprintf(filename, 128, "data/users/%s", user->name);
FILE * f = fopen(filename, "w");
int numFollowing = arrlen(user->following);
int numPosts = arrlen(user->posts);
fwrite(&numFollowing, sizeof(int), 1, f);
fwrite(&numPosts, sizeof(int), 1, f);
for (int i = 0; i < numFollowing; i++) {
fwrite(user->following[i]->name, 1, sizeof(user->following[i]->name), f);
}
for (int i = 0; i < numPosts; i++) {
fwrite(&user->posts[i].timestamp, sizeof(user->posts[i].timestamp), 1, f);
fwrite(user->posts[i].user->name, 1, sizeof(user->posts[i].user->name), f);
fwrite(user->posts[i].content, 1, sizeof(user->posts[i].content), f);
}
fclose(f);
}
void
UserRead(User * user) {
char filename[128];
snprintf(filename, 128, "data/users/%s", user->name);
FILE * f = fopen(filename, "r");
int numFollowing;
int numPosts;
fread(&numFollowing, sizeof(int), 1, f);
fread(&numPosts, sizeof(int), 1, f);
for (int i = 0; i < numFollowing; i++) {
char name[NAME_LEN];
fread(name, 1, sizeof(name), f);
arrput(user->following, UsersFind(mg_str(name)));
}
for (int i = 0; i < numPosts; i++) {
char name[NAME_LEN];
Post post;
fread(&post.timestamp, sizeof(post.timestamp), 1, f);
fread(name, 1, sizeof(name), f);
post.user = UsersFind(mg_str(name));
fread(post.content, 1, sizeof(post.content), f);
}
fclose(f);
}
// Users
User ** g_users;
static User pat, yas, tof;
void
UsersSetup() {
pat = UserNew("pat");
yas = UserNew("yas");
tof = UserNew("tof");
UserRead(&pat);
UserRead(&yas);
UserRead(&tof);
arrput(pat.following, &yas);
arrput(yas.following, &pat);
arrput(tof.following, &yas);
arrput(tof.following, &pat);
arrput(g_users, &pat);
arrput(g_users, &yas);
arrput(g_users, &tof);
}
User *
UsersFind(struct mg_str name) {
for (int i = 0; i < arrlen(g_users); i++) {
User * user = g_users[i];
if (strncmp(user->name, name.ptr, name.len) == 0)
return user;
}
return NULL;
}
// HTML
void
http_redirect_home(struct mg_connection * c, struct mg_http_message * hm, User * user) {
struct mg_str *referer = mg_http_get_header(hm, "Referer");
static char redirectHeaders[128];
snprintf(redirectHeaders, 128,
"Location: %.*s\r\n",
referer->len, referer->ptr);
mg_http_reply(c, 303, redirectHeaders, "");
}
char *
html_404()
{
static char html[1024];
snprintf(html, 1024,
"<!DOCTYPE html>"
"<html>"
"<body>"
"<p><i>Eeeeeeh?</i> <b>The Website's Under Construction</b></p>"
"</body>"
"</html>");
return html;
}
char *
html_user_not_found()
{
static char html[1024];
snprintf(html, 1024,
"<!DOCTYPE html>"
"<html>"
"<body>"
"<p>User was not found :/</p>"
"</body>"
"</html>");
return html;
}
char *
html_post(Post * post) {
static char html[2048];
snprintf(html, 2048,
"<p>[%s] <a href=\"/user/%s\">%s</a>: %s</p>",
ctime(&post->timestamp),
post->user->name,
post->user->name,
post->content);
return html;
}
char *
html_home(User * user)
{
Post ** posts = NULL;
for (int i = 0; i < arrlen(user->following); i++) {
User * userF = user->following[i];
for (int j = 0; j < arrlen(userF->posts); j++) {
Post * post = &userF->posts[j];
bool inserted = false;
for (int k = 0; k < arrlen(posts); k++) {
if (post->timestamp > posts[k]->timestamp) {
arrins(posts, k, post);
inserted = true;
break;
}
}
if (! inserted)
arrput(posts, post);
}
}
static char html[HTML_LEN];
snprintf(html, HTML_LEN,
"<!DOCTYPE html>"
"<html>"
"<body>"
"<form action=\"/api/post/%s\" method=\"post\">"
"<input type=\"text\" name=\"content\"><br>"
"<input type=\"submit\" value=\"Chirp!\">"
"</form>",
user->name);
for (int i = 0; i < arrlen(posts); i++) {
snprintf(html+strlen(html), HTML_LEN-strlen(html),
html_post(posts[i]));
}
snprintf(html+strlen(html), HTML_LEN-strlen(html),
"</body>"
"</html>");
return html;
}
char *
html_user(User * user)
{
static char html[HTML_LEN];
snprintf(html, HTML_LEN,
"<!DOCTYPE html>"
"<html>"
"<body>"
"<form action=\"/api/post/%s\" method=\"post\">"
"<input type=\"text\" name=\"content\"><br>"
"<input type=\"submit\" value=\"Chirp!\">"
"</form>",
user->name);
for (int i = arrlen(user->posts) - 1; i >= 0; i--) {
snprintf(html+strlen(html), HTML_LEN-strlen(html),
html_post(&user->posts[i]));
}
snprintf(html+strlen(html), HTML_LEN-strlen(html),
"</body>"
"</html>");
return html;
}
static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data)
{
if (ev == MG_EV_HTTP_MSG)
{
struct mg_http_message *hm = (struct mg_http_message *)ev_data;
// POST
if (mg_strcmp(hm->method, mg_str("POST")) == 0)
{
// printf("POST: %.*s %.*s\n",
// hm->uri.len, hm->uri.ptr,
// hm->body.len, hm->body.ptr);
// printf("Message: %.*s\n",
// hm->message.len, hm->message.ptr);
struct mg_str caps[2];
if (mg_match(hm->uri, mg_str("/api/post/*"), caps)) {
User * user = UsersFind(caps[0]);
if (user != NULL) {
Post newPost;
newPost.timestamp = time(NULL);
newPost.user = user;
mg_http_get_var(&hm->body, "content", newPost.content, sizeof(newPost.content)-1);
arrput(user->posts, newPost);
UserWrite(user);
http_redirect_home(c, hm, user);
}
}
}
// GET
else if (mg_strcmp(hm->method, mg_str("GET")) == 0)
{
struct mg_str caps[2];
if (mg_match(hm->uri, mg_str("/home/*"), caps)) {
User * user = UsersFind(caps[0]);
if (user == NULL)
mg_http_reply(c, 200, "", html_user_not_found());
else
mg_http_reply(c, 200, "", html_home(user));
}
else if (mg_match(hm->uri, mg_str("/user/*"), caps)) {
User * user = UsersFind(caps[0]);
if (user == NULL)
mg_http_reply(c, 200, "", html_user_not_found());
else
mg_http_reply(c, 200, "", html_user(user));
}
else {
mg_http_reply(c, 404, "", html_404());
}
}
else {
mg_http_reply(c, 404, "", "Unknown");
}
}
}
int main(int argc, char *argv[])
{
UsersSetup();
struct mg_mgr mgr;
mg_mgr_init(&mgr);
mg_http_listen(&mgr, "http://0.0.0.0:8000", fn, &mgr);
while (1)
mg_mgr_poll(&mgr, 1000);
mg_mgr_free(&mgr);
return 0;
}
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