Time Slime is a C library for implementation of a basic time sheet program.

It uses an SQLITE database to store logs, and allows you to clock in/out as well as add a set number of hours.

There is also a shell interface for using only the library from the terminal.

 

Getting Started

To use this as a library in another program, you need the timeslime.h and timeslime.c files.

If your project already includes SQLITE, then replace this line, in timeslime.h:

#include "third_party/sqlite3/sqlite3.h"

With:

#include "path/to/sqlite3.h"

Pointing to your sqlite3.h file.

If your project is NOT using SQLITE, then you need to take third_party/sqlite3/sqlite3.h and third_party/sqlite3/sqlite3.c as well, and change the path to sqlite3.h in timeslime.h based on where you place the files.

Building

To build the command line utility, you can just run:

make

on Windows or Linux.

 

Library Documentation

The Time Slime library has the following functions available for use:

TIMESLIME_STATUS_t TimeSlime_Initialize(char directory_for_database[]);

TIMESLIME_STATUS_t TimeSlime_Close(void);

TIMESLIME_STATUS_t TimeSlime_AddHours(float hours, TIMESLIME_DATE_t date);

TIMESLIME_STATUS_t TimeSlime_ClockIn(TIMESLIME_DATETIME_t time);

TIMESLIME_STATUS_t TimeSlime_ClockOut(TIMESLIME_DATETIME_t time);

TIMESLIME_STATUS_t TimeSlime_GetReport(TIMESLIME_DATE_t start, TIMESLIME_DATE_t end, TIMESLIME_REPORT_t **out);

void TimeSlime_FreeReport(TIMESLIME_REPORT_t **report);

char*  TimeSlime_StatusCode(TIMESLIME_STATUS_t status);

Time Slime Status

TIMESLIME_STATUS_t is a type alias for int, and can be one of the following (defined in timeslime.h):

Value	Description
TIMESLIME_OK	No problems or errors
TIMESLIME_UNKOWN_ERROR	Unkown error prevented function from finishing
TIMESLIME_SQLITE_ERROR	Problem executing SQLITE actions
TIMESLIME_INVALID_YEAR	Invalid year in parameter object
TIMESLIME_INVALID_MONTH	Invalid month in parameter object
TIMESLIME_INVALID_DAY	Invalid day in parameter object
TIMESLIME_INVALID_HOUR	Invalid hour in parameter object
TIMESLIME_INVALID_MINUTE	Invalid minute in parameter object
TIMESLIME_ALREADY_CLOCKED_IN	Unable to clock in since a clock out action has not been performed
TIMESLIME_NOT_CLOCKED_IN	Unable to clock out since a clock in action has not been performed
TIMESLIME_NO_ENTIRES	No time sheet entries were found for a given date range
TIMESLIME_NOT_INITIALIZED	TimeSlime_Initialize(char[]) has not been called yet

If you want to get a string key that represents a status code, use the TimeSlime_StatusCode(TIMESLIME_STATUS_t) method, and pass in the status code. A string will be returned.

Inititialization

The TimeSlime_Initialize(char[]) function needs to be called before any other Time Slime methods. This is responsible for creating the SQLITE database if it does not exist.

The parameter passed to this should be the directory to place the the timeslime.db file (WITHOUT a trailing slash).

Closing

The TimeSlime_Close() function needs to be called before exiting your program, it is responsible for safely disposing of allocated memory.

Adding Hours

It might be desired to add a set number of hours to a time sheet for a specific date (rather than clocking in and out).

This is where the TimeSlime_AddHours(float, TIMESLIME_DATE_t) functions comes in.

The function accepts a float, which is the number of hours worked. Then a TIMESLIME_DATE_t struct, which is the date to add the hours to.

See more about TIMESLIME_DATE_t.

Clocking In and Out

To clock in and out of the time sheet, use the TimeSlime_ClockIn(TIMESLIME_DATETIME_t) and TimeSlime_ClockOut(TIMESLIME_DATETIME_t) functions.

Each function accepts a TIMESLIME_DATETIME_t struct, which represents the date and time that the clock in, clock out should be performed on.

See more about TIMESLIME_DATETIME_t.

Reports

Generating a report will show you how many hours have been worked per day for a certain date range.

TimeSlime_GetReport(TIMESLIME_DATE_t start, TIMESLIME_DATE_t end, TIMESLIME_REPORT_t **out) will generate a report between the start and end dates.

The result will be placed in the TIMESLIME_REPORT_t pointer, and this needs to be passed a pointer to that pointer.

When you are done, use TimeSlime_FreeReport(TIMESLIME_REPORT_t**) to clear allocated memory.

See more about TIMESLIME_DATE_t and TIMESLIME_REPORT_t.

 

Library Datatypes

To avoid conflicts with other libraries, Time Slime defines custom datatypes for use with the library.

Date and DateTime

The Date and DateTime structs are passed to several Time Slime functions.

struct TIMESLIME_DATE_STRUCT
{
    int year;
    int month;
    int day;
};
typedef struct TIMESLIME_DATE_STRUCT TIMESLIME_DATE_t;

struct TIMESLIME_DATETIME_STRUCT
{
    int year;
    int month;
    int day;
    int hour;
    int minute;
};
typedef struct TIMESLIME_DATETIME_STRUCT TIMESLIME_DATETIME_t;

Time Slime also defines some helpful directives to easily create these for the current time.

#define TIMESLIME_DATE_NOW         (TIMESLIME_DATE_t){ 0, 0, 0}
#define TIMESLIME_TIME_NOW         (TIMESLIME_DATETIME_t){ 0, 0, 0, -1, -1 }

Report

The TIMESLIME_STATUS_REPORT_t struct looks like:

// Report Entry
struct TIMESLIME_REPORT_ENTRY_STRUCT
{
    float Hours;
    char Date[];
};
typedef struct TIMESLIME_REPORT_ENTRY_STRUCT TIMESLIME_REPORT_ENTRY_t;

// Time Sheet Report
struct TIMESLIME_REPORT_STRUCT
{
    int NumberOfEntries;
    TIMESLIME_REPORT_ENTRY_t Entries[];
};
typedef struct TIMESLIME_REPORT_STRUCT TIMESLIME_REPORT_t;

 

Terminal Usage

Once build, if you add the executable (in the build folder) to your system PATH, you can run it with the following commands:

# Show information and command help
> timeslime help

# Add an amount of time to the current date
> timeslime add [hours]

# Add an amount of time to a specific date
> timeslime add [hours] [date]

# Clock in
> timeslime clock in

# Clock out
> timeslime clock out

# Run a report
> timeslime report [start-date] [end-date]

IMPORTANT: All dates must be formatted as either YYYY-MM-DD or YYYY/MM/DD

 

Todo

• Better report formatting (done?)
• Allow second parameter of a report to be "today"
• Shell program to prompt user for choices if no parameters (or not all parameters) are given (but works on all systems)
• Imrpove logging

 

 

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