59 lines
1.4 KiB
Go
59 lines
1.4 KiB
Go
package report
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import (
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"bytes"
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"context"
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"fmt"
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"log/slog"
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"reflect"
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"strconv"
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"vctp/db"
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"github.com/xuri/excelize/v2"
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)
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func CreateReport(logger *slog.Logger, Database db.Database, ctx context.Context) ([]byte, error) {
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var xlsx *excelize.File
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sheetName := "Inventory Report"
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var buffer bytes.Buffer
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logger.Debug("Querying inventory table")
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results, err := Database.Queries().ListInventory(ctx)
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if err != nil {
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logger.Error("Unable to query inventory table", "error", err)
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return nil, err
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}
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if len(results) == 0 {
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logger.Error("Empty inventory results")
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return nil, fmt.Errorf("Empty inventory results")
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}
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// Use reflection to determine column headings from the first item
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firstItem := results[0]
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v := reflect.ValueOf(firstItem)
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typeOfItem := v.Type()
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// Create column headers dynamically
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for i := 0; i < v.NumField(); i++ {
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column := string(rune('A'+i)) + "1" // A1, B1, C1, etc.
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xlsx.SetCellValue(sheetName, column, typeOfItem.Field(i).Name)
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}
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// Populate the Excel file with data from the Inventory table
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for i, item := range results {
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v = reflect.ValueOf(item)
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for j := 0; j < v.NumField(); j++ {
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column := string(rune('A'+j)) + strconv.Itoa(i+2) // Start from row 2
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xlsx.SetCellValue(sheetName, column, v.Field(j).Interface())
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}
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}
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// Save the Excel file into a byte buffer
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if err := xlsx.Write(&buffer); err != nil {
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return nil, err
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}
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return buffer.Bytes(), nil
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}
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