path: root/src/api.c

#pragma once
#define _XOPEN_SOURCE
#include <stdlib.h>
#include <stdio.h>
#include <curl/curl.h>
#include <unistd.h>
#include <i18n.h>
#include <string.h>
#include <lib.c>
#include <cJSON.h>
#include <cJSON.c>
#include <time.h>
#include <stdarg.h>
#include <printf.h>
#define DC_API_PREFIX "https://discord.com/api/v8/" /* this can be a format string, DO NOT use format characters inside */
#define DC_LOGIN_FORMAT "{\"login\":\"%s\",\"password\":\"%s\",\"undelete\":false,\"captcha_key\":null,\"login_source\":null,\"gift_code_sku_id\":null}"
#define DC_USER_AGENT "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.131 Safari/537.36"
#define DC_ERROR(e, s, m, ...) dc_push_error(e, s, __func__, __FILE__, __LINE__, 0##__VA_OPT__(1), m __VA_OPT__(,) __VA_ARGS__)
#define DC_CLIENT_ERROR(c, m, ...) DC_ERROR(c->errors, &c->errors_sizeof, m __VA_OPT__(,) __VA_ARGS__) /* yeah, that m is not a typo */
#define DC_API(curl, body, endpoint, ...) dc_api(curl, body, 0##__VA_OPT__(1), endpoint __VA_OPT__(,) __VA_ARGS__)
#define cJSON_GetObjectItem2(root, name1, name2) (cJSON_GetObjectItem(root, name1) ? cJSON_GetObjectItem(cJSON_GetObjectItem(root, name1), name2) : NULL)
#define DC_TIMESTAMP_FORMAT "%Y-%m-%dT%H:%M:%S.XXXXXX%z"
struct dc_error {
	size_t line;
	const char * function /* this is a static string, so it is not copied, do not free it */;
	char * file /* this is a static string, so it is not copied, do not free it */;
	char * message /* this is copied, caller can free it if it was dynamically created by it, it must be freed before destroying struct */;
	time_t time;
	short unsigned int reported /* 0: error was not yet shown to the user, 1: error was already shown to the user */;
};
int dc_error_free(struct dc_error * e) {
	free(e->message); e->message = NULL; /* other strings are static */
	e->line = 0;
	e->function = NULL;
	e->file = NULL;
	e->reported = 0;
	free(e);
};
struct dc_message {
	char * username;
	int discriminator;
	char * content;
	time_t time;
	struct dc_channel * channel;
	unsigned short int tts;
	unsigned long long int id;
};
int dc_message_free (struct dc_message * m) {
	free(m->username); m->username = NULL;
	free(m->content); m->content = NULL;
	m->channel = NULL;
	m->tts = 0;
	m->discriminator = -1;
	m->id = 0;
	/* i'm not sure how to "unset" time_t ... */
	free(m);
}
int dc_message_compare (const void * a, const void * b) {
	struct dc_message * c = (struct dc_message *) a;
	struct dc_message * d = (struct dc_message *) b;
	/* strežnik v arrayu najprej pošlje sporočila iz sedanjosti, nato tista iz preteklosti, zato bo tudi sortiran array takšen */
	return c->time > d->time ? -1 : c->time < d->time ? 1 : 0;
}
struct dc_channel {
	char * name;
	char * topic;
	unsigned long long int id;
	struct dc_guild * guild;
	struct dc_message * messages;
	size_t messages_sizeof;
	unsigned short int sent /* describes status, was message already sent (1) or is it to-be sent (0)? */;
};
int dc_channel_free (struct dc_channel * ch) {
	free(ch->name); ch->name = NULL;
	free(ch->topic); ch->topic = NULL;
	ch->guild = NULL;
	ch->id = 0;
	for (int i = 0; i < ch->messages_sizeof; i++)
		dc_message_free(&ch->messages[i]);
	ch->messages_sizeof = 0;
	free(ch);
}
struct dc_guild {
	char * name;
	unsigned long long id;
	size_t channels_sizeof;
	struct dc_channel * channels;
};
int dc_guild_free (struct dc_guild * g) {
	free(g->name); g->name = NULL;
	g->id = 0;
	for (int i = 0; i < g->channels_sizeof; i++)
		dc_channel_free(&g->channels[i]);
	g->channels_sizeof = 0;
	free(g);
}
struct dc_client {
	CURL * curl;
	struct curl_slist * curl_headers;
	char * authorization;
	char * email; /* email and password are copied, even though they are sometimes static ENV vars - they are not always! */
	char * password;
	char * username;
	int discriminator;
	struct dc_guild * guilds;
	size_t guilds_sizeof;
	struct dc_channel * joinedchannel;
	struct dc_error * errors;
	size_t errors_sizeof;
	struct dc_message * sent_messages;
	size_t sent_messages_sizeof;
};
int dc_client_free (struct dc_client * c) {
	curl_easy_cleanup(c->curl);
	curl_slist_free_all(c->curl_headers);
	free(c->authorization); c->authorization = NULL;
	free(c->email); c->email = NULL;
	free(c->password); c->password = NULL;
	free(c->username); c->username = NULL;
	c->discriminator = -1;
	c->joinedchannel = NULL;
	for (int i = 0; i < c->guilds_sizeof; i++)
		dc_guild_free(&c->guilds[i]);
	c->guilds_sizeof = 0;
	for (int i = 0; i < c->errors_sizeof; i++)
		dc_error_free(&c->errors[i]);
	c->errors_sizeof = 0;
	for (int i = 0; i < c->sent_messages_sizeof; c++)
		dc_message_free(&c->sent_messages[i]);
	c->sent_messages_sizeof = 0;
	free(c);
}
int dc_push_error (struct dc_error * e, size_t * s, const char * c, char * f, size_t l, unsigned short int isfmt, char * m, ...) {
	e = realloc(e, sizeof(struct dc_error)*++*s); /* note: format arguments are evaluated twice */
	size_t strlenm = strlen(m);
	size_t va_count = parse_printf_format(m, 0, NULL);
	if (isfmt && va_count > 0) {
		va_list ap, ap2;
		va_start(ap, m);
		va_copy(ap2, ap);
		strlenm = vsnprintf(NULL, 0, m, ap);
		e[*s-1].message = malloc(sizeof(char)*strlenm+1);
		vsnprintf(e[*s-1].message, strlenm+1, m, ap2);
		va_end(ap);
		va_end(ap2);
	} else {
		e[*s-1].message = malloc(sizeof(char)*strlenm+1);
		strcpy(e[*s-1].message, m);
	}
	e[*s-1].file = f;
	e[*s-1].line = l;
	e[*s-1].function = c /* Caller */;
	e[*s-1].time = time(NULL);
	e[*s-1].reported = 0;
	return 1;
}
cJSON * dc_api (CURL * curl, char * body, int isfmt, char * endpoint, ...) { /* note: format arguments are evaluated twice */
	if (!curl)
		return NULL;
	if (!endpoint)
		return NULL;
	cJSON * json = NULL;
	struct writefunc_string s;
	init_writefunc_string(&s);
	size_t va_count = parse_printf_format(endpoint, 0, NULL);
	char * endpoint_formatted = NULL;
	if (isfmt && va_count > 0) {
		va_list ap, ap2;
		va_start(ap, endpoint);
		va_copy(ap2, ap);
		size_t strlenm = vsnprintf(NULL, 0, endpoint, ap);
		endpoint_formatted = malloc(sizeof(char)*strlenm+1);
		vsnprintf(endpoint_formatted, strlenm, endpoint_formatted, ap2); /* sn instead of s because double evaulation may produce */
		va_end(ap); /* larger output the next time and lead to overflow */
		va_end(ap2);
	}
	curl_easy_setopt(curl, CURLOPT_URL, endpoint_formatted ? endpoint_formatted : endpoint);
	if (!body)
		curl_easy_setopt(curl, CURLOPT_HTTPGET, 1L);
	else
		curl_easy_setopt(curl, CURLOPT_POSTFIELDS, body);
	curl_easy_setopt(curl, CURLOPT_WRITEDATA, &s);
	if (curl_easy_perform(curl) != CURLE_OK)
		goto rc;
	json = cJSON_Parse(s.ptr);
	rc:
	free(endpoint_formatted);
	free(s.ptr); s.ptr = NULL;
	return json;
}
int dc_login (struct dc_client * c) {
	int rs = 1;
	struct writefunc_string s;
	char * data = NULL;
	cJSON * json = NULL;
	if (!c)
		return -1;
	if (!c->email || !c->password) {
		DC_CLIENT_ERROR(c, DC_I18N_MISSING_EP);
		return -2;
	}
	if (!c->curl)
		c->curl = curl_easy_init();
	if (!c->curl) {
		DC_CLIENT_ERROR(c, "curl_easy_init() " DC_I18N_FAILED);
		return -3;
	}
	init_writefunc_string(&s);
	data = malloc(strlen(DC_LOGIN_FORMAT)+strlen(c->email)+strlen(c->password)+1);
	CURLcode res;
	sprintf(data, DC_LOGIN_FORMAT, c->email, c->password);
	c->curl_headers = curl_slist_append(c->curl_headers, "Content-Type: application/json");
	c->curl_headers = curl_slist_append(c->curl_headers, "User-Agent: " DC_USER_AGENT);
	curl_easy_setopt(c->curl, CURLOPT_URL, DC_API_PREFIX "auth/login");
	curl_easy_setopt(c->curl, CURLOPT_FOLLOWLOCATION, 1L);
	curl_easy_setopt(c->curl, CURLOPT_POSTFIELDS, data);
	curl_easy_setopt(c->curl, CURLOPT_WRITEFUNCTION, writefunc);
	curl_easy_setopt(c->curl, CURLOPT_HTTPHEADER, c->curl_headers);
	curl_easy_setopt(c->curl, CURLOPT_WRITEDATA, &s);
	res = curl_easy_perform(c->curl);
	if (res != CURLE_OK) {
		DC_CLIENT_ERROR(c, "curl_easy_perform() " DC_I18N_FAILED ": %s", curl_easy_strerror(res)); /* yeah, format strings are supported */
		rs = -4;
		goto rc;
	}
	json = cJSON_Parse(s.ptr);
	if (!json) {
		const char *error_ptr = cJSON_GetErrorPtr();
		if (!error_ptr) {
			DC_CLIENT_ERROR(c, "cJSON_Parse " DC_I18N_FAILED ": " DC_I18N_JSON_ERROR_BEFORE ": %s", error_ptr);
		} else {
			DC_CLIENT_ERROR(c, "cJSON_Parse " DC_I18N_FAILED);
		}
		rs = -5;
		goto rc;
	}
	cJSON * token = cJSON_GetObjectItem(json, "token");
	if (!cJSON_IsString(token)) {
		DC_CLIENT_ERROR(c, "!cJSON_IsString(token)");
		rs = -6;
		goto rc;
	}
	c->authorization = realloc(c->authorization, strlen(token->valuestring)+1);
	strcpy(c->authorization, token->valuestring);
	data = realloc(data, strlen(c->authorization)+strlen("Authorization: ")+1);
	strcpy(data, "Authorization: ");
	strcat(data, c->authorization);
	free(s.ptr); s.ptr = NULL;
	init_writefunc_string(&s);
	curl_easy_setopt(c->curl, CURLOPT_URL, DC_API_PREFIX "users/@me");
	curl_easy_setopt(c->curl, CURLOPT_HTTPGET, 1L);
	curl_easy_setopt(c->curl, CURLOPT_WRITEDATA, &s);
	c->curl_headers = curl_slist_append(c->curl_headers, data);
	res = curl_easy_perform(c->curl);
	if (res != CURLE_OK) {
		DC_CLIENT_ERROR(c, "curl_easy_perform() " DC_I18N_FAILED ": %s", curl_easy_strerror(res));
		rs = -7;
		goto rc;
	}
	cJSON_Delete(json);
	json = cJSON_Parse(s.ptr);
	if (!json) {
		const char *error_ptr = cJSON_GetErrorPtr();
		if (!error_ptr) {
			DC_CLIENT_ERROR(c, "cJSON_Parse " DC_I18N_FAILED ": " DC_I18N_JSON_ERROR_BEFORE ": %s", error_ptr);
		} else {
			DC_CLIENT_ERROR(c, "cJSON_Parse " DC_I18N_FAILED);
		}
		rs = -8;
		goto rc;
	}
	token = cJSON_GetObjectItem(json, "username");
	cJSON * token2 = cJSON_GetObjectItem(json, "discriminator");
	if (!cJSON_IsString(token) || !cJSON_IsString(token2)) {
		DC_CLIENT_ERROR(c, "!cJSON_IsString(token) || !cJSON_IsString(token2)");
		rs = -9;
		goto rc;
	}
	c->username = realloc(c->username, strlen(token->valuestring)+1);
	strcpy(c->username, token->valuestring);
	c->discriminator = strtol(token2->valuestring, NULL, 10);
	rc:
	free(s.ptr); s.ptr = NULL;
	free(data); data = NULL;
	cJSON_Delete(json);
	return rs;
}
int dc_fetch_guilds (struct dc_client * c) {
	if (!c)
		return -5;
	int rs = 1;
	struct writefunc_string s;
	char * value = NULL;
	char * value2 = NULL;
	CURLcode res;
	cJSON * json = NULL;
	if (!c->username || !c->username[0])
		if ((rs = dc_login(c)) < 0) {
			DC_CLIENT_ERROR(c, "dc_login(c) " DC_I18N_FAILED " (%d)", rs);
			return -1;
		} else rs = 1;
	curl_easy_setopt(c->curl, CURLOPT_URL, DC_API_PREFIX "users/@me/guilds");
	curl_easy_setopt(c->curl, CURLOPT_HTTPGET, 1L);
	curl_easy_setopt(c->curl, CURLOPT_WRITEDATA, &s);
	init_writefunc_string(&s);
	res = curl_easy_perform(c->curl);
	if (res != CURLE_OK) {
		DC_CLIENT_ERROR(c, "curl_easy_perform(c->curl) " DC_I18N_FAILED ": %s", curl_easy_strerror(res));
		rs = -2;
		goto rc;
	}
	json = cJSON_Parse(s.ptr);
	if (!json) {
		const char *error_ptr = cJSON_GetErrorPtr();
		if (!error_ptr) {
			DC_CLIENT_ERROR(c, "cJSON_Parse " DC_I18N_FAILED ": " DC_I18N_JSON_ERROR_BEFORE ": %s", error_ptr);
		} else {
			DC_CLIENT_ERROR(c, "cJSON_Parse " DC_I18N_FAILED);
		}
		rs = -3;
		goto rc;
	}
	if (!cJSON_IsArray(json)) {
		DC_CLIENT_ERROR(c, "!cJSON_IsArray(json)");
		rs = -4;
		goto rc;
	}
	for (int i = 0; i < c->guilds_sizeof; i++)
		dc_guild_free(&c->guilds[i]);
	c->guilds = NULL;
	c->guilds_sizeof = 0;
	cJSON * guild = NULL;
	cJSON_ArrayForEach(guild, json) {
		value = cJSON_GetStringValue(cJSON_GetObjectItem(json, "id"));
		value2= cJSON_GetStringValue(cJSON_GetObjectItem(json, "name"));
		if (!value || !value2) {
			DC_CLIENT_ERROR(c, "!cJSON_GetStringValue(cJSON_GetObjectItem(json, \"id\" || \"name\"))");
			continue;
		}
		c->guilds = realloc(c->guilds, ++c->guilds_sizeof);
		c->guilds[c->guilds_sizeof-1].name = malloc(strlen(value)+1);
		strcpy(c->guilds[c->guilds_sizeof-1].name, value);
		c->guilds[c->guilds_sizeof-1].id = strtoull(value2, NULL, 10);
		c->guilds[c->guilds_sizeof-1].channels_sizeof = 0;
		c->guilds[c->guilds_sizeof-1].channels = NULL;
	}
	rc:
	free(s.ptr); s.ptr = NULL;
	cJSON_Delete(json); json = NULL;
	return rs;
}
int dc_fetch_channels (struct dc_client * c, struct dc_guild * g) {
	int rs = 1;
	if (!c)
		return -1;
	if (!c->username || !c->username[0])
		if ((rs = dc_login(c)) < 0) {
			DC_CLIENT_ERROR(c, "dc_login(c) " DC_I18N_FAILED " (%d)", rs);
			return -2;
		} else rs = 1;
	if (!g || !g->id) {
		DC_CLIENT_ERROR(c, "!g || !g->id");
		return -3;
	}
	CURLcode res;
	struct writefunc_string s;
	init_writefunc_string(&s);
	cJSON * json = NULL;
	char * url = malloc(strlen(DC_API_PREFIX "guilds/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/channels")+1);
	sprintf(url, DC_API_PREFIX "guilds/%llu/channels", g->id);
	curl_easy_setopt(c->curl, CURLOPT_URL, url);
	curl_easy_setopt(c->curl, CURLOPT_HTTPGET, 1L);
	curl_easy_setopt(c->curl, CURLOPT_WRITEDATA, &s);
	res = curl_easy_perform(c->curl);
	if (res != CURLE_OK) {
		DC_CLIENT_ERROR(c, "curl_easy_perform(c->curl) " DC_I18N_FAILED ": %s", curl_easy_strerror(res));
		rs = -4;
		goto rc;
	}
	json = cJSON_Parse(s.ptr);
	if (!json) {
		const char *error_ptr = cJSON_GetErrorPtr();
		if (!error_ptr) {
			DC_CLIENT_ERROR(c, "cJSON_Parse " DC_I18N_FAILED ": " DC_I18N_JSON_ERROR_BEFORE ": %s", error_ptr);
		} else {
			DC_CLIENT_ERROR(c, "cJSON_Parse " DC_I18N_FAILED);
		}
		rs = -5;
		goto rc;
	}
	if (!cJSON_IsArray(json)) {
		DC_CLIENT_ERROR(c, "!cJSON_IsArray(json), s.ptr = %s", s.ptr);
		rs = -6;
		goto rc;
	}
	cJSON * channel = NULL;
	for (int i = 0; i < g->channels_sizeof; i++)
		dc_channel_free(&g->channels[i]);
	g->channels_sizeof = 0;
	cJSON_ArrayForEach(channel, json) {
		char * topic = cJSON_GetStringValue(cJSON_GetObjectItem(json, "topic"));
		char * name = cJSON_GetStringValue(cJSON_GetObjectItem(json, "name"));
		char * id = cJSON_GetStringValue(cJSON_GetObjectItem(json, "id"));
		double type = cJSON_GetNumberValue(cJSON_GetObjectItem(json, "type"));
		if (!id || !name || type == NAN) {
			DC_CLIENT_ERROR(c, "!id || !name || type == NAN");
			continue;
		}
		if (type != 0) /* if it's not a text channel (z. B. voice channel, category, ...) */
			continue;
		if (!topic)
			topic = "";
		g->channels = realloc(g->channels, ++g->channels_sizeof);
		g->channels[g->channels_sizeof-1].name = malloc(strlen(name)+1);
		strcpy(g->channels[g->channels_sizeof-1].name, name);
		g->channels[g->channels_sizeof-1].topic = malloc(strlen(topic)+1);
		strcpy(g->channels[g->channels_sizeof-1].topic, topic);
		g->channels[g->channels_sizeof-1].id = strtoull(id, NULL, 10);
		g->channels[g->channels_sizeof-1].guild = g;
		g->channels[g->channels_sizeof-1].messages = NULL;
		g->channels[g->channels_sizeof-1].messages_sizeof = 0;
	}
	rc:
	free(s.ptr); s.ptr = NULL;
	free(url); url = NULL;
	cJSON_Delete(json); json = NULL;
	return rs;
}
int dc_send_message (struct dc_client * c, struct dc_message * m) {
	int rs = 1;
	struct tm tm; /* not used at all, you can delete it, I am autistic xD */
	if (!c)
		return -1;
	if (!c->username || !c->username[0])
		if ((rs = dc_login(c)) < 0) {
			DC_CLIENT_ERROR(c, "dc_login(c) " DC_I18N_FAILED " (%d)", rs);
			return -2;
		} else rs = 1;
	/* it'd be bad to assume joinedchannel if the following is false though */
	if (!m) {
		DC_CLIENT_ERROR(c, "!m");
		return -3;
	}
	cJSON * json = cJSON_CreateObject();
	cJSON * nons = cJSON_CreateNumber(rand());
	cJSON_AddItemToObject(json, "nonce", nons);
	cJSON * content = cJSON_CreateString(m->content);
	cJSON_AddItemToObject(json, "content", content);
	cJSON * tts = m->tts ? cJSON_CreateTrue() : cJSON_CreateFalse();
	cJSON_AddItemToObject(json, "tts", tts);
	char * body = cJSON_Print(json);
	if (!body) {
		DC_CLIENT_ERROR(c, "cJSON_Print " DC_I18N_FAILED);
		rs = -4;
		goto rc;
	}
	cJSON_Delete(json); json = NULL;
	/* {content: "yeet", nonce: "820762917392613376", tts: false} */
	json = DC_API(c->curl, body, DC_API_PREFIX "channels/%llu/messages", m->channel->id);
	if (!json) {
		const char *error_ptr = cJSON_GetErrorPtr();
		if (!error_ptr) {
			DC_CLIENT_ERROR(c, "cJSON_Parse " DC_I18N_FAILED ": " DC_I18N_JSON_ERROR_BEFORE ": %s", error_ptr);
		} else {
			DC_CLIENT_ERROR(c, "cJSON_Parse " DC_I18N_FAILED);
		}
		rs = -5;
		goto rc;
	}
	char * discriminator = cJSON_GetStringValue(cJSON_GetObjectItem2(json, "author", "discriminator"));
	if (!discriminator) {
		DC_CLIENT_ERROR(c, "!discriminator");
		rs = -6;
		goto rc;
	}
	m->discriminator = strtol(discriminator, NULL, 10);
	char * username = cJSON_GetStringValue(cJSON_GetObjectItem2(json, "author", "username"));
	if (!username) {
		DC_CLIENT_ERROR(c, "!username");
		rs = -6;
		goto rc;
	}
	m->username = malloc(strlen(username)+1);
	strcpy(m->username, username); /* we don't directly point as that changes when we delete */
	rc:
	free(body); body = NULL;
	cJSON_Delete(json); json = NULL;
	return rs;
}
int dc_fetch_messages (struct dc_client * c, struct dc_channel * ch) {
	int rs = 1;
	struct tm tm;
	if (!c)
		return -1;
	if (!c->username || !c->username[0])
		if ((rs = dc_login(c)) < 0) {
			DC_CLIENT_ERROR(c, "dc_login(c) " DC_I18N_FAILED " (%d)", rs);
			return -2;
		} else rs = 1;
	/* it'd be bad to assume joinedchannel if the following is false though */
	if (!ch || !ch->id) {
		DC_CLIENT_ERROR(c, "!ch || !ch->id");
		return -3;
	}
	cJSON * json = DC_API(c->curl, NULL, DC_API_PREFIX "channels/%llu/messages?limit=100", ch->id);
	if (!json) {
		const char *error_ptr = cJSON_GetErrorPtr();
		if (!error_ptr) {
			DC_CLIENT_ERROR(c, "cJSON_Parse " DC_I18N_FAILED ": " DC_I18N_JSON_ERROR_BEFORE ": %s", error_ptr);
		} else {
			DC_CLIENT_ERROR(c, "cJSON_Parse " DC_I18N_FAILED);
		}
		rs = -5;
		goto rc;
	}
	if (!cJSON_IsArray(json)) {
		DC_CLIENT_ERROR(c, "!cJSON_IsArray(json)");
		rs = -6;
		goto rc;
	}
	cJSON * message = NULL;
	/*
	 for (int i = 0; i < ch->messages_sizeof; i++)
		dc_message_free(&ch->messages[i]);
		ch->messages_sizeof = 0;
	*/ /* we'll rather add messages to existing ones */
	cJSON_ArrayForEach(message, json) {
		char * timestamp = cJSON_GetStringValue(cJSON_GetObjectItem(json, "timestamp"));
		char * content = cJSON_GetStringValue(cJSON_GetObjectItem(json, "content"));
		char * id = cJSON_GetStringValue(cJSON_GetObjectItem(json, "id"));
		char * discriminator = cJSON_GetStringValue(cJSON_GetObjectItem2(json, "author", "discriminator"));
		char * username = cJSON_GetStringValue(cJSON_GetObjectItem2(json, "author", "username"));
		if (!id || !timestamp || !content || !username || !discriminator) {
			DC_CLIENT_ERROR(c, "!id || !timestamp || !content || !username || discriminator < 0");
			continue;
		}
		if (strlen(timestamp) < 26) {
			DC_CLIENT_ERROR(c, "strlen(timestamp) < 26");
			continue;
		}
		for (int i = 20; i <= 25; i++)
			timestamp[i] == 'X'; /* because strptime does not have wildcard support and those numbers are sub-second fractions */
		if (!strptime(timestamp, DC_TIMESTAMP_FORMAT, &tm)) {
			DC_CLIENT_ERROR(c, "strptime(timestamp, DC_TIMESTAMP_FORMAT, &tm) " DC_I18N_FAILED);
			continue;
		}
		unsigned long long int idull = strtoull(id, NULL, 10);
		for (int i = 0; i < ch->messages_sizeof; i++)
			if (idull == ch->messages[i].id)
				continue; /* remove duplicates */
		ch->messages = realloc(ch->messages, ++ch->messages_sizeof);
#define DC_FMTM /* fetch messages this message */ ch->messages[ch->messages_sizeof-1]
		DC_FMTM.time = mktime(&tm);
		DC_FMTM.content = malloc(strlen(content)+1);
		strcpy(DC_FMTM.content, content);
		DC_FMTM.username = malloc(strlen(username)+1);
		strcpy(DC_FMTM.username, username);
		DC_FMTM.id = idull;
		DC_FMTM.discriminator = strtol(discriminator, NULL, 10);
		DC_FMTM.channel = ch;
	}
	qsort(ch->messages, ch->messages_sizeof, sizeof(struct dc_message), dc_message_compare); /* we sort so that present messages are in the start of the array and old messages are to the end of the array */
	rc:
	cJSON_Delete(json); json = NULL;
	return rs;
}
struct dc_api_thread_control {
	unsigned short int power; /* 1 if the thread should run, set it to 0 for the thread to return at the end of the loop */
	struct dc_client * clients; /* "array" of clients the thread should manage, ONLY ONE dc_api_thread PER PROCESS! */
	size_t dc_clients_sizeof;
};
int dc_api_thread (struct dc_api_thread_control * t) { /* updates messages and sends messages when they are in the outbox */
	return -1;
} /* the thread shall use mutexes when doing things with shared memory - client structs */