Profile.js : Refactoring: Avoid Global Variables

[ksibisamir]

The current codebase uses global variables (gfsprofilePic, gfsUserLegal), which can lead to potential conflicts and make the code harder to maintain and debug.

Current Code:
`let gfsprofilePic;
let gfsUserLegal;
const conn = mongoose.connection;

conn.once('open', () => {
gfsprofilePic = Grid(conn.db, mongoose.mongo);
gfsprofilePic.collection('user_file');
gfsUserLegal = Grid(conn.db, mongoose.mongo);
gfsUserLegal.collection('user_legal');
});
`
In the current code, gfsprofilePic and gfsUserLegal are global variables that are set inside a callback function.

Refactored Code:

One possible solution could be to encapsulate these variables and related logic in a class or a function, making the variables local to the class or function. For example, you might refactor the code to look like this:

`class GridManager {
constructor() {
this.gfsprofilePic = null;
this.gfsUserLegal = null;
}

initializeGridFs(conn) {
this.gfsprofilePic = Grid(conn.db, mongoose.mongo);
this.gfsprofilePic.collection('user_file');
this.gfsUserLegal = Grid(conn.db, mongoose.mongo);
this.gfsUserLegal.collection('user_legal');
}
}

const gridManager = new GridManager();
const conn = mongoose.connection;
conn.once('open', () => {
gridManager.initializeGridFs(conn);
});
`
In the refactored code, gfsprofilePic and gfsUserLegal are instance properties of the GridManager class. This way, they are not global variables, and you can control their scope more effectively.

Please note that this refactoring should be done carefully to ensure no side effects are introduced, especially if these variables are used elsewhere in your code. Make sure to replace any usage of gfsprofilePic and gfsUserLegal with the appropriate method call or property access on the GridManager instance. Also, be sure to test thoroughly after making these changes to ensure there are no regressions.