package Ġme . rag hu . expense tracker . db Ċ Ċ import Ġandroidx . lifecycle . LiveData Ċ import Ġandroidx . paging . DataSource Ċ import Ġandroidx . room .* Ċ import Ġkotlinx . coroutines . flow . Flow Ċ import Ġjava . util .* Ċ Ċ /** Ċ Ġ* ĠExp ense ĠDao Ġfor Ġexpense Ċ Ġ* Ġhttps :// medium . com / android developers / room - coroutines - 4 2 2 b 7 8 6 dc 4 c 5 Ċ Ġ*/ Ċ @ Dao Ċ interface ĠExp ense Dao Ġ{ ĊĊĠĠĠ Ġ// Ġusing Ġsuspend Ġensures Ġthe Ġcode Ġruns Ġoff Ġui Ġthread . ĊĠĠĠ Ġ@ Insert ( on Conflict Ġ= ĠOn Conflict Strategy . REPLACE ) ĊĠĠĠ Ġsuspend Ġfun Ġinsert Expense ( expense : ĠExp ense ): Long ĊĊĠĠĠ Ġ// Ġno Ġneed Ġfor Ġsuspend Ġas Ġit Ġis Ġconverted Ġto Ġli ved ata ĊĠĠĠ Ġ@ Query (" SELECT Ġ* ĠFROM Ġexpense ĠORDER ĠBY Ġdate ĠDESC ") ĊĠĠĠ Ġfun Ġfetch Exp enses (): ĠDataSource . Factory < Int , ĠExp ense > ĊĊĠĠĠ Ġ// Ġusing Ġsuspend Ġensures Ġthe Ġcode Ġruns Ġoff Ġui Ġthread . ĊĠĠĠ Ġ@ Query (" DELETE ĠFROM Ġexpense ĠWHERE Ġid Ġ= Ġ: expense Id ") ĊĠĠĠ Ġsuspend Ġfun Ġdelete Expense ( expense Id : Int ) ĊĊĠĠĠ Ġ@ Query (" SELECT Ġ* ĠFROM Ġexpense ĠWHERE Ġid Ġ= Ġ: expense Id ") ĊĠĠĠ Ġfun Ġget Expense ById ( expense Id : Int ): ĠLive Data < Expense > ĊĊĠĠĠ Ġ// Ġusing Ġli ved ata Ġno Ġneed Ġfor Ġsuspend ĊĠĠĠ Ġ@ Query (" SELECT Ġid , date , SUM ( expense _ amount ) Ġas Ġexpense _ amount ĠFROM Ġexpense ĠWHERE Ġdate ĠBETWEEN Ġ: from ĠAND Ġ: to ĠGROUP ĠBY Ġdate ĠORDER ĠBY Ġdate ĠASC ") ĊĠĠĠ Ġfun Ġexpense InRange ( from : ĠDate , Ġto : ĠDate ): ĠLive Data < List < Expense >> ĊĊĠĠĠ Ġ@ Query (" SELECT ĠSUM ( expense _ amount ) Ġas Ġtotal ĠFROM Ġexpense Ġwhere Ġdate ĠBETWEEN Ġ: start Day ĠAND Ġ: end Day ") ĊĠĠĠ Ġfun Ġexpense For Current Month ( ĊĠĠĠĠĠĠĠ Ġstart Day : ĠDate ?, ĊĠĠĠĠĠĠĠ Ġend Day : ĠDate ? ĊĠĠĠ Ġ): ĠLive Data < Float > ĊĊĠĠĠ Ġ@ Query (" UPDATE Ġexpense ĠSET Ġexpense _ type Ġ= Ġ: expense Type , Ġexpense _ amount Ġ= Ġ: expense Amount , Ġre marks Ġ= Ġ: remarks , Ġdate Ġ= Ġ: date ĠWHERE Ġid Ġ= Ġ: id ") ĊĠĠĠ Ġsuspend Ġfun Ġupdate Expense ( id : ĠInt , Ġexpense Type : ĠString , Ġexpense Amount : ĠString , Ġre marks : ĠString , Ġdate : ĠDate ) Ċ }