Timesheet tracking for employees and managers

TimesheetUser 
|-- userId (Google's unique identifier, often 'sub' from the OAuth response)
|-- username (optional, might not be provided by Google)
|-- email (user's email address from Google OAuth)
|-- managerId (FK)
|-- isManager

Timesheet
|-- timesheetId
|-- userId (FK)
|-- endDate
|-- status

TimesheetEntry
|-- entryId
|-- timesheetId (FK)
|-- projectId (FK)
|-- hoursWorked
|-- date

Project
|-- projectId
|-- projectName
 
Aliases
|-- userId (FK)
|-- projectId (FK)
|-- alias

• Properties:

  • userId (use the unique identifier from Google OAuth, often called sub)
  • username (optional, as it may not be provided by Google)
  • email (the user's email address from Google OAuth)
  • managerId
  • isManager (boolean)

• Relationships:

  • One user can have multiple timesheets.
  • One manager can have multiple employees.

• Properties:

  • timesheetId
  • userId (foreign key)
  • endDate
  • status

• Relationships:

  • One timesheet belongs to one user.
  • One timesheet has multiple entries (representing hours worked on different projects on different days).

• Properties:

  • entryId
  • timesheetId (foreign key)
  • projectId
  • hoursWorked
  • date

• Relationships:

  • One entry belongs to one timesheet.
  • One entry is associated with one project and one date.

• Properties:

  • projectId
  • projectName

• Relationships:

  • One project can be associated with multiple entries in different timesheets.

• Properties
  • userId (foreign key)
  • projectId (foreign key)
  • alias (string)
• Relationships
  • one alias is associated with one project for one user

• Setting up projects table

CREATE TABLE Project (
    projectId SERIAL PRIMARY KEY,
    projectName VARCHAR(255) NOT NULL
);

• Setting up timesheetEntries table

CREATE TABLE TimesheetEntry (
    entryId SERIAL PRIMARY KEY,
    timesheetId INT,
    projectId INT,
    hoursWorked INT,
    date DATE,
    FOREIGN KEY (timesheetId) REFERENCES Timesheet(timesheetId),
    FOREIGN KEY (projectId) REFERENCES Project(projectId)
);

• Setting up the timesheets table

CREATE TABLE Timesheet (
    timesheetId SERIAL PRIMARY KEY,
    userId VARCHAR(255),
    endDate DATE,
    status VARCHAR(10) CHECK (status IN ('approved', 'working', 'submitted', 'revise')),
    FOREIGN KEY (userId) REFERENCES TimesheetUser(userId)
);

• Setting up the users table

CREATE TABLE TimesheetUser (
    userId VARCHAR(255) PRIMARY KEY,
    email VARCHAR(255) NOT NULL,
    managerId VARCHAR(255),
    isManager BOOLEAN,
    FOREIGN KEY (managerId) REFERENCES TimesheetUser(userId)
);