5 files changed, 318 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..6097dbc
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+lib/cJSON.h
+lib/cJSON.c
+# the following is the binary
+discord.c
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..d6b3cc9
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,7 @@
+default:
+	gcc -Ilib -Isrc -I. src/main.c -lcurl -odiscord.c
+prepare:
+	wget https://raw.githubusercontent.com/DaveGamble/cJSON/master/cJSON.c -O lib/cJSON.c
+	wget https://raw.githubusercontent.com/DaveGamble/cJSON/master/cJSON.h -O lib/cJSON.h
+clean:
+	rm lib/cJSON.c lib/cJSON.h
diff --git a/src/i18n.h b/src/i18n.h
new file mode 100644
index 0000000..8232538
--- /dev/null
+++ b/src/i18n.h
@@ -0,0 +1,10 @@
+#define DC_I18N_FAILED "neuspel"
+#define DC_I18N_UNREC_ARG "neprepoznan argument %c, poskusi -h"
+#define DC_I18N_USAGE "uporaba: %s -e naslov@example -p geslo"
+#define DC_I18N_ARG_ALREADY_SET "argument %c že ima nastavljeno vrednost (mogoče okoljske spremenljivke)"
+#define DC_I18N_MISSING_EP "manjka poštni naslov in/ali geslo"
+#define DC_I18N_LOGGED_IN "prijavljeni ste kot %s"
+#define DC_I18N_LOGIN_FAILED "prijava neuspela. prijavite se v brskalniku. strežnik je odgovoril: %s"
+#define DC_I18N_NOT_JOINED "preden lahko pišeš, se moraš pridružiti kanalu"
+#define DC_I18N_GUILD_NOT_SET "skupina ni izbrana!"
+#define DC_I18N_CHANNEL_NOT_SET "kanal ni izbran!"
diff --git a/src/lib.c b/src/lib.c
new file mode 100644
index 0000000..b6a5f3a
--- /dev/null
+++ b/src/lib.c
@@ -0,0 +1,26 @@
+struct writefunc_string {
+	char *ptr;
+	size_t len;
+};
+void init_writefunc_string(struct writefunc_string *s) {
+	s->len = 0;
+	s->ptr = malloc(s->len+1);
+	if (s->ptr == NULL) {
+		fprintf(stderr, "malloc() " DC_I18N_FAILED "\n");
+		exit(EXIT_FAILURE);
+	}
+	s->ptr[0] = '\0';
+}
+size_t writefunc(void *ptr, size_t size, size_t nmemb, struct writefunc_string *s) {
+	size_t new_len = s->len + size*nmemb;
+	s->ptr = realloc(s->ptr, new_len+1);
+	if (s->ptr == NULL) {
+		fprintf(stderr, "realloc() " DC_I18N_FAILED "\n");
+		exit(EXIT_FAILURE);
+	}
+	memcpy(s->ptr+s->len, ptr, size*nmemb);
+	s->ptr[new_len] = '\0';
+	s->len = new_len;
+	return size*nmemb;
+}
+
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..ed6a677
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,271 @@
+#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>
+#define DC_API_PREFIX "https://discord.com/api/v8/"
+#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_DEBUG 0
+#define DC_COMMAND_LINE_LENGTH 2000
+#define DC_COMMAND_CHAR '/'
+int main(int argc, char ** argv) {
+	srand(time(NULL));
+	int returnstatus = 0;
+	int opt;
+	cJSON * guilds = 0;
+	char * email = getenv("DC_E");
+	char * password = getenv("DC_P");
+	while ((opt = getopt(argc, argv, "e:p:h")) != -1) {
+		switch (opt) {
+			case 'h':
+				fprintf(stdout, DC_I18N_USAGE);
+				break;
+			case 'e':
+				if (!email) {
+					email = malloc(strlen(optarg)+1);
+					strcpy(email, optarg);
+				} else
+					fprintf(stderr, DC_I18N_ARG_ALREADY_SET "\n", opt);
+				break;
+			case 'p':
+				if (!password) {
+					password = malloc(strlen(optarg)+1);
+					strcpy(password, optarg);
+				} else
+					fprintf(stderr, DC_I18N_ARG_ALREADY_SET "\n", opt);
+				break;
+			default:
+				fprintf(stderr, DC_I18N_UNREC_ARG "\n", opt);
+		}
+	}
+	if (!email || !password) {
+		fprintf(stderr, DC_I18N_MISSING_EP "\n");
+		free(email); email = NULL;
+		free(password); password = NULL;
+		return 1;
+	}
+	CURL *curl;
+	CURLcode res;
+	curl = curl_easy_init();
+	if (!curl) {
+		fprintf(stderr, "curl_easy_init() " DC_I18N_FAILED ".\n");
+		return 1;
+	}
+	struct writefunc_string s;
+	init_writefunc_string(&s);
+
+	char * data = malloc(sizeof(DC_LOGIN_FORMAT)+strlen(email)+strlen(password));
+	sprintf(data, DC_LOGIN_FORMAT, email, password);
+	struct curl_slist *headers = NULL;
+	headers = curl_slist_append(headers, "Content-Type: application/json");
+	headers = curl_slist_append(headers, "User-Agent: " DC_USER_AGENT);
+	curl_easy_setopt(curl, CURLOPT_URL, DC_API_PREFIX "auth/login");
+	curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
+	curl_easy_setopt(curl, CURLOPT_POSTFIELDS, data);
+	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writefunc);
+	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
+	curl_easy_setopt(curl, CURLOPT_WRITEDATA, &s);
+	res = curl_easy_perform(curl);
+	if (res != CURLE_OK)
+		fprintf(stderr, "curl_easy_perform() " DC_I18N_FAILED ": %s\n", curl_easy_strerror(res));
+	cJSON * json = cJSON_Parse(s.ptr);
+	cJSON * token = cJSON_GetObjectItemCaseSensitive(json, "token");
+	char * authorization = NULL;
+	if (cJSON_IsString(token) && (token->valuestring != NULL)) {
+		authorization = malloc(strlen(token->valuestring)+strlen("authorization: ")+1);
+		strcpy(authorization, "Authorization: ");
+		strcat(authorization, token->valuestring);
+		if(DC_DEBUG) fprintf(stderr, "d: %s\n", s.ptr);
+		cJSON_Delete(json);
+	} else {
+		fprintf(stderr, DC_I18N_LOGIN_FAILED "\n", s.ptr);
+		cJSON_Delete(json);
+		returnstatus = 3;
+		free(s.ptr); s.ptr = NULL;
+		goto returncleanly;
+	}
+	free(s.ptr); s.ptr = NULL;
+	init_writefunc_string(&s);
+	curl_easy_setopt(curl, CURLOPT_URL, DC_API_PREFIX "users/@me");
+	curl_easy_setopt(curl, CURLOPT_HTTPGET, 1L);
+	headers = curl_slist_append(headers, authorization);
+	res = curl_easy_perform(curl);
+	if (res != CURLE_OK)
+		fprintf(stderr, "curl_easy_perform() " DC_I18N_FAILED ": %s\n", curl_easy_strerror(res));
+	json = cJSON_Parse(s.ptr);
+	token = cJSON_GetObjectItemCaseSensitive(json, "username");
+	cJSON * token2 = cJSON_GetObjectItemCaseSensitive(json, "discriminator");
+	char * handle = NULL;
+	if (cJSON_IsString(token) && (token->valuestring != NULL)
+		&& cJSON_IsString(token2) && (token2->valuestring != NULL)) {
+		handle = malloc(strlen(token->valuestring)+1+strlen(token2->valuestring)+1);
+		strcpy(handle, token->valuestring);
+		strcat(handle, "#");
+		strcat(handle, token2->valuestring);
+		fprintf(stdout, DC_I18N_LOGGED_IN "\n", handle);
+	} else {
+		fprintf(stderr, DC_I18N_LOGIN_FAILED "\n", s.ptr);
+		cJSON_Delete(json);
+		returnstatus = 4;
+		free(s.ptr); s.ptr = NULL;
+		goto returncleanly;
+	}
+	free(s.ptr); s.ptr = NULL;
+	/* start command listener */
+	char * fgetsret = NULL;
+	char cmd[DC_COMMAND_LINE_LENGTH+1];
+	long long int setguild = 0;
+	long long int setchannel = 0;
+	char * joinedchannelname = NULL;
+	char * joinedchannelid = NULL;
+	while (1) {
+		fprintf(stderr, "%s%s> ", joinedchannelname ? "#" : "", joinedchannelname ? joinedchannelname : "");
+		fflush(stderr);
+		fgetsret = fgets(cmd, DC_COMMAND_LINE_LENGTH, stdin);
+		if (fgetsret == NULL) {
+			fprintf(stderr, "fgets() " DC_I18N_FAILED "\n");
+			returnstatus = 5;
+			goto returncleanly;
+			break;
+		}
+		if (cmd[0] == DC_COMMAND_CHAR) {
+			switch (cmd[1]) {
+				case 'g':
+				case 'G':
+				case 's': /* /guilds */
+				case 'S': /* /guilds force-update */
+					if (!guilds || (strchr(cmd, ' ') ? (strchr(cmd, ' ')+1)[0] == 'f' : 0)) {
+#define DC_API_METHOD_GET(body) curl_easy_setopt(curl, CURLOPT_HTTPGET, 1L)
+#define DC_API_METHOD_POST(body) curl_easy_setopt(curl, CURLOPT_POSTFIELDS, body)
+#define DC_API(endpoint, method, body, output) do {\
+	curl_easy_setopt(curl, CURLOPT_URL, endpoint); \
+	DC_API_METHOD_##method(body); \
+	free(s.ptr); s.ptr = NULL; \
+	init_writefunc_string(&s); \
+	res = curl_easy_perform(curl); \
+	if (res != CURLE_OK) \
+		fprintf(stderr, "curl_easy_perform() " DC_I18N_FAILED ": %s\n", curl_easy_strerror(res)); \
+	output == NULL ? cJSON_Delete(output):rand(); \
+	output = cJSON_Parse(s.ptr); } while (0)
+						DC_API(DC_API_PREFIX "users/@me/guilds", GET, "", guilds);
+					}
+					int i = 0;
+					cJSON * guild = NULL;
+					cJSON_ArrayForEach(guild, guilds) {
+						token = cJSON_GetObjectItem(guild, "name");
+						fprintf(stdout, "   %d. %s\n", i++, token->valuestring);
+					}
+					break;
+				case 'c':
+				case 'C':
+				case 'k': /* /channels <guild number> [force-update] */
+				case 'K':
+					if (strchr(cmd, ' ') == NULL) {
+						fprintf(stderr, DC_I18N_GUILD_NOT_SET "\n");
+						break;
+					}
+					setguild = strtoll(strchr(cmd, ' ')+1, NULL, 10);
+					cJSON_ArrayForEach(guild, guilds) {
+						if (setguild-- == 0) {
+							cJSON * guildchannels = cJSON_GetObjectItem(guild, "channels");
+							if (!cJSON_IsObject(guildchannels) ||
+									strchr(strchr(cmd,' ')+1,' ') ? 1 : 0) {
+#define	DC_UPDATE_CHANNELS(guild) do {\
+	token = cJSON_GetObjectItem(guild, "id"); \
+	char * tempstring = malloc(strlen(token->valuestring)+strlen("guilds//channels")+1+ strlen(DC_API_PREFIX)); \
+	sprintf(tempstring, DC_API_PREFIX "guilds/%s/channels", token->valuestring); \
+	guildchannels = cJSON_CreateObject(); \
+	DC_API(tempstring, GET, "", guildchannels); \
+	cJSON_AddItemToObject(guild, "channels", guildchannels); \
+	free(tempstring); tempstring = NULL; } while (0)
+								DC_UPDATE_CHANNELS(guild);
+							}
+							setguild = 0;
+							cJSON * guildchannel = NULL;
+							cJSON_ArrayForEach(guildchannel, guildchannels) {
+								token = cJSON_GetObjectItem(guildchannel, "name");
+								token2 = cJSON_GetObjectItem(guildchannel, "topic");
+								cJSON * type = cJSON_GetObjectItem(guildchannel, "type");
+								if (type->valuedouble == 0) /* samo za besedilne kanale */
+									fprintf(stdout, "   %lld. #%s%s%s\n", setguild++, token->valuestring, token2->valuestring ? " - " : "", token2->valuestring ? token2->valuestring : "");
+							}
+							break;
+						}
+					}
+					break;
+				case 'j':
+				case 'J':
+				case 'p':
+				case 'P':
+					if (strchr(cmd, ' ') == NULL) {
+						fprintf(stderr, DC_I18N_GUILD_NOT_SET "\n");
+						break;
+					}
+					if (strchr(strchr(cmd, ' ')+1, ' ') == NULL) {
+						fprintf(stderr, DC_I18N_CHANNEL_NOT_SET "\n");
+						break;
+					}
+					setguild = strtoll(strchr(cmd, ' ')+1, NULL, 10);
+					setchannel = strtoll(strchr(strchr(cmd, ' ')+1, ' ')+1, NULL, 10);
+					if (!guilds)
+						DC_API(DC_API_PREFIX "users/@me/guilds", GET, "", guilds);
+					cJSON_ArrayForEach(guild, guilds) {
+						if (setguild-- == 0) {
+							cJSON * guildchannels = cJSON_GetObjectItem(guild, "channels");
+							if (!cJSON_IsArray(guildchannels))
+								DC_UPDATE_CHANNELS(guild);
+							cJSON * guildchannel = NULL;
+							cJSON_ArrayForEach(guildchannel, guildchannels) {
+								cJSON * type = cJSON_GetObjectItem(guildchannel, "type");
+								if (type->valuedouble != 0) setchannel++;
+								if (setchannel-- == 0) {
+									joinedchannelid = cJSON_GetObjectItem(guildchannel, "id")->valuestring;
+									joinedchannelname = cJSON_GetObjectItem(guildchannel, "name")->valuestring;
+								}
+							}
+						}
+					}
+					break;
+				case 'q':
+				case 'Q':
+				case 'i':
+				case 'I':
+					goto returncleanly;
+				default:
+					goto to_je_sporocilo;
+			}
+		} else {
+			to_je_sporocilo:
+			if (joinedchannelid == NULL) {
+				fprintf(stderr, DC_I18N_NOT_JOINED "\n");
+				continue;
+			}
+			cJSON * message = cJSON_CreateObject();
+			cJSON * nons = cJSON_CreateNumber(rand());
+			cJSON_AddItemToObject(message, "nonce", nons);
+			cJSON * content = cJSON_CreateString(cmd);
+			cJSON_AddItemToObject(message, "content", content);
+			cJSON * tts = cJSON_CreateFalse();
+			cJSON_AddItemToObject(message, "tts", tts);
+			char * jsonmessage = cJSON_Print(message);
+			char * target = malloc(strlen(joinedchannelid)+strlen("channels//messages")+strlen(DC_API_PREFIX)+1);
+			sprintf(target, DC_API_PREFIX "channels/%s/messages", joinedchannelid);
+			cJSON * jsonresponse;
+			DC_API(target, POST, jsonmessage, jsonresponse);
+			free(jsonmessage); jsonmessage = NULL;
+			free(target); target = NULL;
+			cJSON_Delete(message);
+			cJSON_Delete(jsonresponse); /* jsonresponse izgleda sploh nismo uporabili */
+		}
+	}
+	returncleanly:
+	cJSON_Delete(guilds);
+	curl_easy_cleanup(curl);
+	curl_slist_free_all(headers);
+	return 0;
+}