app.go

package main

import (
	"fmt"
	"time"
)

// newApp provides a new application instance.
func newApp(config *Config, inputs *Inputs, filtered *Filtered, outputs *Outputs) *App {
	return &App{
		Config:   config,
		Inputs:   inputs,
		Filtered: filtered,
		Outputs:  outputs,
	}
}

// start starts an application with a beauty output to console.
func (app *App) start() error {
	// Start timer.
	start := time.Now()

	// Check, if input data is not empty.
	if app.Inputs.Data != nil {
		if len(app.Inputs.Data) > 0 {
			printStyled(
				"Hello and welcome to csv2api! 👋",
				"margin-top-bottom",
			)
			printStyled(
				fmt.Sprintf(
					"– According to the settings in '%s', %d transactions were filtered out of %d to start the process.",
					configFilePath, len(app.Filtered.Data), len(app.Inputs.Data),
				),
				"",
			)

			// Check, if output data is not empty.
			if len(app.Outputs.Data) > 0 {
				printStyled(
					fmt.Sprintf(
						"– Only %d transactions got into the final set of actions to be taken... Please wait!",
						len(app.Outputs.Data),
					),
					"margin-bottom",
				)

				// Loop for all output data.
				for _, data := range app.Outputs.Data {
					// Start updating fields.
					if err := app.updateField(data.ID, data.FieldName, data.Values); err != nil {
						printStyled(
							fmt.Sprintf("✕ There was an error with collect output data: %v", err),
							"margin-left",
						)
					}
				}

				// Check, if you need to save CSV file with filtered PK.
				if app.Config.SaveFilteredPKToCSV {
					// Save filtered PK to CSV.
					if err := app.saveFilteredPKToCSV(); err != nil {
						printStyled(
							fmt.Sprintf("✕ There was an error with save filtered PK to CSV: %v", err),
							"margin-top",
						)
					}
				}
			}
		}

		printStyled(
			fmt.Sprintf(
				"All done! 🎉 Time elapsed: %.2fs",
				time.Since(start).Seconds(),
			),
			"margin-top-bottom",
		)
	}

	return nil
}