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dailystat.go
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dailystat.go
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package b2c_app_v1
import (
"context"
"database/sql"
"errors"
"fmt"
"time"
"github.com/gidyon/mpesapayments/pkg/utils/timeutil"
"gorm.io/gorm"
)
func (b2cAPI *b2cAPIServer) dailyDailyStatWorker(ctx context.Context) {
ticker := time.NewTicker(2*time.Hour + time.Minute)
defer ticker.Stop()
loop:
for {
currTime := time.Now()
select {
case <-ctx.Done():
case <-ticker.C:
currTime2 := time.Now()
lockKey := fmt.Sprintf("workerlock:%s", currTime2.UTC().String()[:15])
existRes, err := b2cAPI.RedisDB.Exists(ctx, lockKey).Result()
if err != nil {
b2cAPI.Logger.Errorf("failed to check if key exists: %v", err)
continue
}
if existRes == 0 {
// Key does not exist so we set it
err = b2cAPI.RedisDB.Set(ctx, lockKey, "yes", 2*time.Hour).Err()
if err != nil {
b2cAPI.Logger.Errorf("failed to set lock key: %v", err)
continue
}
} else if existRes == 1 {
// Key does exist so we dont generate the statistics
continue
}
if currTime2.Day() != currTime.Day() {
// we're in the next day; lets update current statistics for yesterday first
startTime, err := timeutil.ParseDayStartTime(int32(currTime.Year()), int32(currTime.Month()), int32(currTime.Day()))
if err != nil {
b2cAPI.Logger.Errorf("WORKER: failed to parse start timestamp: %v", err)
goto loop
}
endTime := startTime.Add(time.Hour * 24)
b2cAPI.generateDailyStatistics(ctx, startTime, &endTime)
} else {
endTime, err := timeutil.ParseDayEndTime(int32(currTime2.Year()), int32(currTime2.Month()), int32(currTime2.Day()))
if err != nil {
b2cAPI.Logger.Errorf("WORKER: failed to parse end timestamp: %v", err)
goto loop
}
startTime := time.Unix(endTime.Unix()-int64(24*60*60), 0)
b2cAPI.generateDailyStatistics(ctx, &startTime, &endTime)
}
}
}
}
type shortCode struct {
OrgShortCode string
}
func (b2cAPI *b2cAPIServer) generateDailyStatistics(ctx context.Context, startTime, endTime *time.Time) {
// Get all unique org_short_code
shortCodes := make([]*shortCode, 0)
err := b2cAPI.SQLDB.Table((&Payment{}).TableName()).
Where("transaction_time BETWEEN ? AND ?", startTime, endTime).
Distinct("org_short_code").
Select("org_short_code").
Scan(&shortCodes).Error
if err != nil {
b2cAPI.Logger.Errorf("WORKER: failed to scan org_short_code to slice: %v", err)
return
}
// Generate report
for _, shortCode := range shortCodes {
db := b2cAPI.SQLDB.Model(&Payment{}).
Where("transaction_time BETWEEN ? AND ?", startTime, endTime).
Where("org_short_code = ?", shortCode.OrgShortCode)
date := startTime.String()[:10]
var transactions int64
// Count of total transactions
err = db.Count(&transactions).Error
if err != nil {
b2cAPI.Logger.Errorf(
"WORKER: failed to count transactions for day %s org_short_code %s: %v",
date, shortCode.OrgShortCode, err,
)
return
}
var successfulTransactions int64
// Count of successful transactions
err = db.Where("succeeded = ?", true).Count(&successfulTransactions).Error
if err != nil {
b2cAPI.Logger.Errorf(
"WORKER: failed to count successful transactions for day [%s] org_short_code [%s]: %v",
date, shortCode.OrgShortCode, err,
)
return
}
var totalAmount sql.NullFloat64
// Get total amount transacted
err = db.Model(&Payment{}).Select("sum(transaction_amount) as total").Row().Scan(&totalAmount)
if err != nil {
b2cAPI.Logger.Errorf(
"WORKER: failed to get sum of transactions for day [%]s org_short_code [%s]: %v",
date, shortCode.OrgShortCode, err,
)
return
}
var totalCharges sql.NullFloat64
// Get total charges
err = db.Model(&Payment{}).Select("sum(system_charges) as total").Row().Scan(&totalCharges)
if err != nil {
b2cAPI.Logger.Errorf(
"WORKER: failed to get sum of transactions for day %s org_short_code %s: %v",
date, shortCode.OrgShortCode, err,
)
return
}
var totalAmountF, totalChargesF float32
if totalAmount.Valid {
totalAmountF = float32(totalAmount.Float64)
}
if totalCharges.Valid {
totalChargesF = float32(totalCharges.Float64)
}
// Create stat
statDB := &DailyStat{
OrgShortCode: shortCode.OrgShortCode,
Date: date,
TotalTransactions: int32(transactions),
SuccessfulTransactions: int32(successfulTransactions),
FailedTransactions: int32(transactions) - int32(successfulTransactions),
TotalAmountTransacted: totalAmountF,
TotalCharges: totalChargesF,
}
statDB2 := &DailyStat{}
// Save statistics
err = b2cAPI.SQLDB.First(statDB2, "org_short_code = ? AND date = ?", shortCode.OrgShortCode, date).Error
switch {
case err == nil:
// Update
err = b2cAPI.SQLDB.Where("id = ?", statDB2.ID).Updates(statDB).Error
if err != nil {
b2cAPI.Logger.Errorf(
"WORKER: failed to update stats for day [%s] org_short_code [%s] : %v", date, shortCode.OrgShortCode, err,
)
return
}
case errors.Is(err, gorm.ErrRecordNotFound):
// Create
err = b2cAPI.SQLDB.Create(statDB).Error
if err != nil {
b2cAPI.Logger.Errorf(
"WORKER: failed to create stats for day [%s] org_short_code [%s] : %v", date, shortCode.OrgShortCode, err,
)
return
}
default:
b2cAPI.Logger.Errorf("WORKER: failed to find stat %v", err)
return
}
}
}