From 1ad9927e8eb242a828effff2d3bec2aae9314667 Mon Sep 17 00:00:00 2001
From: Trumeet <yuuta@yuuta.moe>
Date: Tue, 5 Apr 2022 13:06:55 -0700
Subject: Support global statistics.

---
 CMakeLists.txt |  2 +-
 logic.h        |  2 ++
 main.c         |  5 +++++
 stat.c         | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 54 insertions(+), 1 deletion(-)
 create mode 100644 stat.c

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7251ace..deede86 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -15,6 +15,6 @@ set(CMAKE_EXE_LINKER_FLAGS_DEBUG
         "${CMAKE_EXE_LINKER_FLAGS_DEBUG} -fsanitize=address")
 add_definitions(-D_POSIX_C_SOURCE=200809L)
 
-add_executable(ksyxbotd main.c tdutils.c tdutils.h log.c log.h botd.h db.c db.h cmdline.c store.c logic.h query.c refresh.c)
+add_executable(ksyxbotd main.c tdutils.c tdutils.h log.c log.h botd.h db.c db.h cmdline.c store.c logic.h query.c refresh.c stat.c)
 target_include_directories(ksyxbotd PUBLIC "${PROJECT_BINARY_DIR}")
 target_link_libraries(ksyxbotd PRIVATE tdc tdsqlite m)
diff --git a/logic.h b/logic.h
index 3246e8f..47216c5 100644
--- a/logic.h
+++ b/logic.h
@@ -12,4 +12,6 @@ void store(struct TdMessage *msg, void (*cb)(bool));
 
 void refresh(struct TdMessage *msg);
 
+void stat(struct TdMessage *msg);
+
 #endif /* KSYXBOT_LOGIC_H */
diff --git a/main.c b/main.c
index 841c21d..c9a9a33 100644
--- a/main.c
+++ b/main.c
@@ -39,6 +39,11 @@ static void cb_store(bool succ) {}
 
 int handle_message(struct TdUpdateNewMessage *update) {
     struct TdMessage *msg = update->message_;
+    if (msg->content_->ID == CODE_MessageText &&
+        !strncmp(((struct TdMessageText *) msg->content_)->text_->text_, "/stat", 5)) {
+        stat(msg);
+        return 0;
+    }
     if (msg->sender_id_->ID == CODE_MessageSenderUser &&
         ((struct TdMessageSenderUser *) msg->sender_id_)->user_id_ == ADMIN) {
         if (msg->content_->ID == CODE_MessageText &&
diff --git a/stat.c b/stat.c
new file mode 100644
index 0000000..387bab6
--- /dev/null
+++ b/stat.c
@@ -0,0 +1,46 @@
+/*
+ * Created by yuuta on 4/5/22.
+ */
+
+#include "logic.h"
+#include "log.h"
+#include "tdutils.h"
+#include "db.h"
+
+void stat(struct TdMessage *msg) {
+    int r;
+    char m[2048];
+    sqlite3_stmt *stmt = NULL;
+    if ((r = sqlite3_prepare_v2(db, "SELECT COUNT(user), SUM(i) FROM stats;", -1, &stmt, NULL))) {
+        goto sql_err;
+        sql_err:
+        {
+            snprintf(m, 1024, "Cannot query statistics: %s.", sqlite3_errstr(r));
+            LOGEV("%s", m);
+            if (stmt) sqlite3_finalize(stmt);
+            goto send;
+        }
+    }
+    if ((r = sqlite3_step(stmt)) != SQLITE_ROW) goto sql_err;
+    snprintf(m, 1024, "普天之下，莫非 K 土。TGCN 共有 %d 位 K 教授的虔诚学生卖了 %d 句菜。",
+             sqlite3_column_int(stmt, 0),
+             sqlite3_column_int(stmt, 1));
+    sqlite3_finalize(stmt);
+    goto send;
+    send:
+    td_send(TdCreateObjectSendMessage(msg->chat_id_,
+                                      0,
+                                      msg->id_,
+                                      TdCreateObjectMessageSendOptions(false, false, true, NULL),
+                                      NULL,
+                                      (struct TdInputMessageContent *)
+                                              TdCreateObjectInputMessageText(
+                                                      TdCreateObjectFormattedText(m,
+                                                                                  (struct TdVectorTextEntity *)
+                                                                                          TdCreateObjectVectorObject(
+                                                                                                  0, NULL)
+                                                      ),
+                                                      false,
+                                                      false)),
+            NULL, NULL);
+}
\ No newline at end of file
-- 
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