Add some SQLiteStatement functions to prepare for other PRs (#203)

* Add datetime to sql statement, data stored in millisecond resolution

Signed-off-by: Marc Emmers <[email protected]>

* Add reset for reuse of a statement and add bind_double

Signed-off-by: Marc Emmers <[email protected]>

---------

Signed-off-by: Marc Emmers <[email protected]>

include/ocpp/common/sqlite_statement.hpp

@@ -7,6 +7,7 @@
 #include <sqlite3.h>
 
 #include <everest/logging.hpp>
+#include <ocpp/common/types.hpp>
 
 namespace ocpp {
 
@@ -46,6 +47,10 @@ class SQLiteStatement {
         return sqlite3_step(this->stmt);
     }
 
+    int reset() {
+        return sqlite3_reset(this->stmt);
+    }
+
     int bind_text(const int idx, const std::string& val, SQLiteString lifetime = SQLiteString::Static) {
         return sqlite3_bind_text(this->stmt, idx, val.c_str(), val.length(),
                                  lifetime == SQLiteString::Static ? SQLITE_STATIC : SQLITE_TRANSIENT);
@@ -71,6 +76,32 @@ class SQLiteStatement {
         return bind_int(index, val);
     }
 
+    int bind_datetime(const int idx, const ocpp::DateTime val) {
+        return sqlite3_bind_int64(
+            this->stmt, idx,
+            std::chrono::duration_cast<std::chrono::milliseconds>(val.to_time_point().time_since_epoch()).count());
+    }
+
+    int bind_datetime(const std::string& param, const ocpp::DateTime val) {
+        int index = sqlite3_bind_parameter_index(this->stmt, param.c_str());
+        if (index <= 0) {
+            throw std::out_of_range("Parameter not found in SQL query");
+        }
+        return bind_datetime(index, val);
+    }
+
+    int bind_double(const int idx, const double val) {
+        return sqlite3_bind_double(this->stmt, idx, val);
+    }
+
+    int bind_double(const std::string& param, const double val) {
+        int index = sqlite3_bind_parameter_index(this->stmt, param.c_str());
+        if (index <= 0) {
+            throw std::out_of_range("Parameter not found in SQL query");
+        }
+        return bind_double(index, val);
+    }
+
     int bind_null(const int idx) {
         return sqlite3_bind_null(this->stmt, idx);
     }
@@ -95,6 +126,11 @@ class SQLiteStatement {
         return sqlite3_column_int(this->stmt, idx);
     }
 
+    ocpp::DateTime column_datetime(const int idx) {
+        int64_t time = sqlite3_column_int64(this->stmt, idx);
+        return DateTime(date::utc_clock::time_point(std::chrono::milliseconds(time)));
+    }
+
     double column_double(const int idx) {
         return sqlite3_column_double(this->stmt, idx);
     }