refactoring, add examples, move to library()

examples/inlinekeyboard/inlinekeyboard.c

@@ -0,0 +1,131 @@
+#include <signal.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <tgbot.h>
+
+#define WELCOME_MSG "Hi there! This bot is coded in C."
+
+void parse_command(tgbot *bot, tgbot_update *update);
+void sighandler(int signum);
+void callback_parser(tgbot *bot, tgbot_cbquery *query);
+
+bool run = true;
+tgbot bot;
+size_t rows = 1, columns = 2;
+tgbot_inlinekeyboardmarkup **keyboard;
+
+/* Callback handler function */
+void callback_handler(tgbot *bot, tgbot_cbquery *query) {
+	if (strcmp("test-callback", query->data) == 0) {
+		/* Handle `test-callback` */
+
+		tgbot_inlinekeyboardmarkup **home_keyboard;
+		tgbot_allocate_inlinekeyboardmarkup(&home_keyboard, 1, 1);
+		strncpy(home_keyboard[0][0].text, "Home", sizeof(home_keyboard[0][0].text));
+		strncpy(home_keyboard[0][0].url, "", sizeof(home_keyboard[0][0].url));
+		strncpy(home_keyboard[0][0].callback_data, "home", sizeof(home_keyboard[0][0].callback_data));
+
+		tgbot_edit_message_text(bot, query->chat_id, query->message_id, "Callback called!", home_keyboard, 1, 1);
+		tgbot_deallocate_inlinekeyboardmarkup(home_keyboard, 1);
+
+		return;
+	} else if (strcmp("home", query->data) == 0) {
+		tgbot_edit_message_text(bot, query->chat_id, query->message_id, WELCOME_MSG, keyboard, rows, columns);
+
+		return;
+	}
+}
+
+void sighandler(int signum) {
+	fprintf(stdout, "Closing...\n");
+	run = false;
+}
+
+void parse_command(tgbot *bot, tgbot_update *update) {
+	tgbot_rc ret;
+
+	if (strcmp("/start", update->text) == 0) {
+		/* Example of an InlineKeyboardMarkup */
+		/* Check global variables */
+		tgbot_allocate_inlinekeyboardmarkup(&keyboard, rows, columns);
+
+		/* Populate the InlineKeyboardMarkup */
+		strncpy(keyboard[0][0].text, "Google", sizeof(keyboard[1][0].text));
+		strncpy(keyboard[0][0].url, "https://google.com", sizeof(keyboard[1][0].url));
+		strncpy(keyboard[0][0].callback_data, "", sizeof(keyboard[1][0].callback_data));
+
+		strncpy(keyboard[0][1].text, "Callback", sizeof(keyboard[0][1].text));
+		strncpy(keyboard[0][1].url, "", sizeof(keyboard[0][1].url));
+		strncpy(keyboard[0][1].callback_data, "test-callback", sizeof(keyboard[0][1].callback_data));
+
+		/* If you want 3 buttons on 2 rows, for example on the first row 2 buttons and on the second only one */
+		/* you have to put rows = 2, columns = 2 and pass an empty string to .text field */
+
+		ret = tgbot_send_message(bot, update->chat_id, WELCOME_MSG, "Markdown", keyboard, rows, columns);
+
+		/* Deallocate the keyboard */
+		/* See sighandler() */
+
+		if (ret != TGBOT_OK) {
+			fprintf(stderr, "Failed to send message\n");
+		}
+
+		return;
+	}
+
+	/* Echo the message */
+	ret = tgbot_send_message(bot, update->chat_id, update->text, "Markdown", NULL, 0, 0);
+	if (ret != TGBOT_OK) {
+		fprintf(stderr, "Failed to send message\n");
+	}
+}
+
+int main(void) {
+	/* Find "your" way to free the resources */
+	signal(SIGINT, sighandler);
+
+	tgbot_rc ret;
+	char token[256];
+
+	FILE *fp = fopen(".token", "r");
+	if (fp == NULL) {
+		fprintf(stderr, "No .token file found!\n");
+		exit(EXIT_FAILURE);
+	}
+	fscanf(fp, "%s", token);
+	fprintf(stdout, "Token: %s\n", token);
+	fclose(fp);
+
+	/* Initialize the bot */
+	ret = tgbot_init(&bot, token);
+	if (ret != TGBOT_OK) {
+		fprintf(stderr, "tgbot_init()\n");
+		exit(1);
+	}
+
+	/* Calling tgbot_get_me() you can get bot's info */
+	fprintf(stdout, "Running Telegram bot...\nPress Ctrl-C to close.\n");
+
+	tgbot_update update;
+
+	/* Main loop */
+	while (run) {
+		ret = tgbot_get_update(&bot, &update, callback_handler);
+		if (ret != TGBOT_OK) {
+			fprintf(stderr, "tgbot_get_updates()\n");
+			continue;
+		}
+
+		if (update.message_id > 0) {
+			parse_command(&bot, &update);
+		}
+	}
+
+	tgbot_destroy(&bot);
+	tgbot_deallocate_inlinekeyboardmarkup(keyboard, rows);
+
+	return 0;
+}