Подключаемый модуль для работы с БД ПП Парус 8 (начало)

modules/parus_db.js

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+/*
+  Сервис интеграции ПП Парус 8 с WEB API
+  Дополнительный модуль: работа с БД ПП Парус 8 (Oracle)
+*/
+
+//----------------------
+// Подключение библиотек
+//----------------------
+
+const oracledb = require("oracledb"); //Работа с СУБД Oracle
+
+//------------
+// Тело модуля
+//------------
+
+//Подключение к БД
+const connect = prms => {
+    return new Promise((resolve, reject) => {
+        oracledb.getConnection(
+            {
+                user: prms.user,
+                password: prms.password,
+                connectString: prms.connectString
+            },
+            function(err, connection) {
+                if (err) {
+                    reject(err);
+                } else {
+                    resolve(connection);
+                }
+            }
+        );
+    });
+};
+
+//Отключение от БД
+const disconnect = connection => {
+    return new Promise((resolve, reject) => {
+        if (connection) {
+            connection.close(function(err) {
+                if (err) {
+                    reject(err);
+                } else {
+                    resolve();
+                }
+            });
+        } else {
+            reject(new Error("No connection specified"));
+        }
+    });
+};
+
+//Исполнение запроса
+const execute = prms => {
+    console.log("EXECUTE");
+};
+
+//-----------------
+// Интерфейс модуля
+//-----------------
+
+exports.connect = connect;
+exports.disconnect = disconnect;
+exports.execute = execute;
+
+/*
+oracledb.getConnection(
+    {
+        user: cfg.dbConnect.user,
+        password: cfg.dbConnect.password,
+        connectString: cfg.dbConnect.connectString
+    },
+    function(err, connection) {
+        if (err) {
+            console.error(err.message);
+            return;
+        }
+        connection.execute(
+            // The statement to execute
+            "SELECT rn, agnabbr FROM agnlist WHERE rn = :id",
+
+            // The "bind value" 180 for the bind variable ":id"
+            [1431890],
+
+            // execute() options argument.  Since the query only returns one
+            // row, we can optimize memory usage by reducing the default
+            // maxRows value.  For the complete list of other options see
+            // the documentation.
+            {
+                maxRows: 1
+                //, outFormat: oracledb.OBJECT  // query result format
+                //, extendedMetaData: true      // get extra metadata
+                //, fetchArraySize: 100         // internal buffer allocation size for tuning
+            },
+
+            // The callback function handles the SQL execution results
+            function(err, result) {
+                if (err) {
+                    console.error(err.message);
+                    setTimeout(() => {
+                        doRelease(connection);
+                    }, 2000);
+                    return;
+                }
+                console.log(result.metaData); // [ { name: 'DEPARTMENT_ID' }, { name: 'DEPARTMENT_NAME' } ]
+                console.log(result.rows); // [ [ 180, 'Construction' ] ]
+                setTimeout(() => {
+                    doRelease(connection);
+                }, 2000);
+            }
+        );
+    }
+);
+
+// Note: connections should always be released when not needed
+function doRelease(connection) {
+    connection.close(function(err) {
+        if (err) {
+            console.log("Connection closed with erros: " + err.message);
+        } else {
+            console.log("Connection closed - no erros");
+        }
+    });
+}
+*/