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|
package reports
import (
"database/sql"
"fmt"
"time"
"git.tjp.lol/punchcard/internal/queries"
)
type InvoiceData struct {
ClientID int64
ClientName string
ProjectName string
ContractorName string
ContractorLabel string
ContractorEmail string
InvoiceNumber int64
DateRange DateRange
LineItems []LineItem
TotalHours float64
TotalAmount float64
GeneratedDate time.Time
}
type LineItem struct {
Description string `json:"description"`
Hours float64 `json:"hours"`
Rate float64 `json:"rate"`
Amount float64 `json:"amount"`
}
type RateSource string
const (
RateSourceEntry RateSource = "entry"
RateSourceProject RateSource = "project"
RateSourceClient RateSource = "client"
)
type timeEntryData struct {
TimeEntryID int64
StartTime time.Time
EndTime sql.NullTime
Description sql.NullString
EntryBillableRate sql.NullInt64
ClientID int64
ClientName string
ClientBillableRate sql.NullInt64
ProjectID sql.NullInt64
ProjectName sql.NullString
ProjectBillableRate sql.NullInt64
DurationSeconds int64
RateSource string
}
func GenerateInvoiceData(
entries interface{},
clientID int64,
clientName,
projectName string,
contractor queries.Contractor,
number int64,
dateRange DateRange,
) (*InvoiceData, error) {
var timeEntries []timeEntryData
switch e := entries.(type) {
case []queries.GetInvoiceDataByClientRow:
for _, entry := range e {
timeEntries = append(timeEntries, timeEntryData{
TimeEntryID: entry.TimeEntryID,
StartTime: entry.StartTime,
EndTime: entry.EndTime,
Description: entry.Description,
EntryBillableRate: entry.EntryBillableRate,
ClientID: entry.ClientID,
ClientName: entry.ClientName,
ClientBillableRate: entry.ClientBillableRate,
ProjectID: entry.ProjectID,
ProjectName: entry.ProjectName,
ProjectBillableRate: entry.ProjectBillableRate,
DurationSeconds: entry.DurationSeconds,
RateSource: entry.RateSource,
})
}
case []queries.GetInvoiceDataByProjectRow:
for _, entry := range e {
timeEntries = append(timeEntries, timeEntryData{
TimeEntryID: entry.TimeEntryID,
StartTime: entry.StartTime,
EndTime: entry.EndTime,
Description: entry.Description,
EntryBillableRate: entry.EntryBillableRate,
ClientID: entry.ClientID,
ClientName: entry.ClientName,
ClientBillableRate: entry.ClientBillableRate,
ProjectID: sql.NullInt64{Int64: entry.ProjectID, Valid: true},
ProjectName: sql.NullString{String: entry.ProjectName, Valid: true},
ProjectBillableRate: entry.ProjectBillableRate,
DurationSeconds: entry.DurationSeconds,
RateSource: entry.RateSource,
})
}
default:
return nil, fmt.Errorf("unsupported entry type")
}
lineItems := groupTimeEntriesIntoLineItems(timeEntries)
totalHours := 0.0
totalAmount := 0.0
for _, item := range lineItems {
totalHours += item.Hours
totalAmount += item.Amount
}
invoice := &InvoiceData{
ClientID: clientID,
ClientName: clientName,
ProjectName: projectName,
ContractorName: contractor.Name,
ContractorLabel: contractor.Label,
ContractorEmail: contractor.Email,
InvoiceNumber: number,
DateRange: dateRange,
LineItems: lineItems,
TotalHours: totalHours,
TotalAmount: totalAmount,
GeneratedDate: time.Now().UTC(),
}
return invoice, nil
}
func groupTimeEntriesIntoLineItems(entries []timeEntryData) []LineItem {
var lineItems []LineItem
// Group 1: Entries with overridden rates
entryRateGroups := make(map[int64][]timeEntryData)
// Group 2: Entries using project rates
projectRateGroups := make(map[int64][]timeEntryData)
// Group 3: Entries using client rates
clientRateGroups := make(map[int64][]timeEntryData)
for _, entry := range entries {
switch RateSource(entry.RateSource) {
case RateSourceEntry:
rate := entry.EntryBillableRate.Int64
entryRateGroups[rate] = append(entryRateGroups[rate], entry)
case RateSourceProject:
if entry.ProjectID.Valid {
projectRateGroups[entry.ProjectID.Int64] = append(projectRateGroups[entry.ProjectID.Int64], entry)
}
case RateSourceClient:
clientRateGroups[entry.ClientID] = append(clientRateGroups[entry.ClientID], entry)
}
}
// Process overridden rates first
for rate, entries := range entryRateGroups {
if len(entries) > 0 {
lineItem := createLineItem(entries, rate, "Custom rate work")
lineItems = append(lineItems, lineItem)
}
}
// Process project rates
for _, entries := range projectRateGroups {
if len(entries) > 0 {
projectName := "Unknown Project"
rateCents := int64(0)
if entries[0].ProjectName.Valid {
projectName = entries[0].ProjectName.String
}
if entries[0].ProjectBillableRate.Valid {
rateCents = entries[0].ProjectBillableRate.Int64
}
lineItem := createLineItem(entries, rateCents, projectName)
lineItems = append(lineItems, lineItem)
}
}
// Process client rates
for _, entries := range clientRateGroups {
if len(entries) > 0 {
clientName := entries[0].ClientName
rateCents := int64(0)
if entries[0].ClientBillableRate.Valid {
rateCents = entries[0].ClientBillableRate.Int64
}
lineItem := createLineItem(entries, rateCents, fmt.Sprintf("General work - %s", clientName))
lineItems = append(lineItems, lineItem)
}
}
return lineItems
}
func createLineItem(entries []timeEntryData, hourlyRateCents int64, description string) LineItem {
totalSeconds := int64(0)
for _, entry := range entries {
totalSeconds += entry.DurationSeconds
}
// Calculate whole hours and remaining seconds using integer arithmetic
wholeHours := totalSeconds / 3600
remainingSeconds := totalSeconds % 3600
// Calculate amount for whole hours (integer arithmetic, result in cents)
wholeHoursAmountCents := wholeHours * hourlyRateCents
// Calculate amount for partial hour, rounded down to the minute
// First convert remaining seconds to whole minutes (truncate seconds)
partialMinutes := remainingSeconds / 60
// Calculate amount for those whole minutes (integer arithmetic)
partialHourAmountCents := partialMinutes * hourlyRateCents / 60
// Total amount in cents, then convert to dollars
totalAmountCents := wholeHoursAmountCents + partialHourAmountCents
amount := float64(totalAmountCents) / 100.0
// Convert total seconds to hours for display
hours := float64(totalSeconds) / 3600.0
// Convert rate to dollars for display
hourlyRate := float64(hourlyRateCents) / 100.0
return LineItem{
Description: description,
Hours: hours,
Rate: hourlyRate,
Amount: amount,
}
}
|
