generator

README

Golang invoice generator

A super fast golang package to generate invoices, delivery notes and quotations as pdf using https://github.com/go-pdf/fpdf.

Download from Github

go get -u github.com/angelodlfrtr/go-invoice-generator

Example output

Quick start

package main

import (
	"io/ioutil"
	"testing"

	generator "github.com/angelodlfrtr/go-invoice-generator"
)

func TestNew(t *testing.T) {
	doc, _ := generator.New(generator.Invoice, &generator.Options{
		TextTypeInvoice: "FACTURE",
		AutoPrint:       true,
	})

	doc.SetHeader(&generator.HeaderFooter{
		Text:       "<center>Cupcake ipsum dolor sit amet bonbon. I love croissant cotton candy. Carrot cake sweet I love sweet roll cake powder.</center>",
		Pagination: true,
	})

	doc.SetFooter(&generator.HeaderFooter{
		Text:       "<center>Cupcake ipsum dolor sit amet bonbon. I love croissant cotton candy. Carrot cake sweet I love sweet roll cake powder.</center>",
		Pagination: true,
	})

	doc.SetRef("testref")
	doc.SetVersion("someversion")

	doc.SetDescription("A description")
	doc.SetNotes("I love croissant cotton candy. Carrot cake sweet I love sweet roll cake powder! I love croissant cotton candy. Carrot cake sweet I love sweet roll cake powder! I love croissant cotton candy. Carrot cake sweet I love sweet roll cake powder! I love croissant cotton candy. Carrot cake sweet I love sweet roll cake powder! ")

	doc.SetDate("02/03/2021")
	doc.SetPaymentTerm("02/04/2021")

	logoBytes, err := ioutil.ReadFile("./example_logo.png")
    if err != nil {
		log.Fatal(err)
    }

	doc.SetCompany(&generator.Contact{
		Name: "Test Company",
		Logo: logoBytes,
		Address: &generator.Address{
			Address:    "89 Rue de Brest",
			Address2:   "Appartement 2",
			PostalCode: "75000",
			City:       "Paris",
			Country:    "France",
		},
	})

	doc.SetCustomer(&generator.Contact{
		Name: "Test Customer",
		Address: &generator.Address{
			Address:    "89 Rue de Paris",
			PostalCode: "29200",
			City:       "Brest",
			Country:    "France",
		},
	})

	for i := 0; i < 3; i++ {
		doc.AppendItem(&generator.Item{
			Name:        "Cupcake ipsum dolor sit amet bonbon, coucou bonbon lala jojo, mama titi toto",
			Description: "Cupcake ipsum dolor sit amet bonbon, Cupcake ipsum dolor sit amet bonbon, Cupcake ipsum dolor sit amet bonbon",
			UnitCost:    "99876.89",
			Quantity:    "2",
			Tax: &generator.Tax{
				Percent: "20",
			},
		})
	}

	doc.AppendItem(&generator.Item{
		Name:     "Test",
		UnitCost: "99876.89",
		Quantity: "2",
		Tax: &generator.Tax{
			Amount: "89",
		},
		Discount: &generator.Discount{
			Percent: "30",
		},
	})

	doc.AppendItem(&generator.Item{
		Name:     "Test",
		UnitCost: "3576.89",
		Quantity: "2",
		Discount: &generator.Discount{
			Percent: "50",
		},
	})

	doc.AppendItem(&generator.Item{
		Name:     "Test",
		UnitCost: "889.89",
		Quantity: "2",
		Discount: &generator.Discount{
			Amount: "234.67",
		},
	})

	doc.SetDefaultTax(&generator.Tax{
		Percent: "10",
	})

	// doc.SetDiscount(&generator.Discount{
	// Percent: "90",
	// })
	doc.SetDiscount(&generator.Discount{
		Amount: "1340",
	})

	pdf, err := doc.Build()
	if err != nil {
		log.Fatal(err)
	}

	err = pdf.OutputFileAndClose("out.pdf")

	if err != nil {
		log.Fatal(err)
	}
}

License

This SDK is distributed under the Apache License, Version 2.0, see LICENSE and NOTICE for more information.

Documentation

Overview

Package generator allows you to easily generate invoices, delivery notes and quotations in GoLang.

Index

• Constants
• Variables
• type Address
  • func (a *Address) ToString() string
• type Contact
• type Discount
  • func (d *Discount) Prepare() error
• type Document
  • func New(docType string, options *Options) (*Document, error)
  • func (d *Document) AppendItem(item *Item) *Document
  • func (doc *Document) Build() (*fpdf.Fpdf, error)
  • func (doc *Document) Pdf() *fpdf.Fpdf
  • func (d *Document) SetCompany(company *Contact) *Document
  • func (d *Document) SetCustomer(customer *Contact) *Document
  • func (d *Document) SetDate(date string) *Document
  • func (d *Document) SetDefaultTax(tax *Tax) *Document
  • func (d *Document) SetDescription(desc string) *Document
  • func (d *Document) SetDiscount(discount *Discount) *Document
  • func (d *Document) SetFooter(footer *HeaderFooter) *Document
  • func (d *Document) SetHeader(header *HeaderFooter) *Document
  • func (d *Document) SetNotes(notes string) *Document
  • func (d *Document) SetPaymentTerm(term string) *Document
  • func (d *Document) SetRef(ref string) *Document
  • func (d *Document) SetType(docType string) *Document
  • func (doc *Document) SetUnicodeTranslator(fn UnicodeTranslateFunc)
  • func (d *Document) SetVersion(version string) *Document
  • func (d *Document) Validate() error
• type HeaderFooter
  • func (hf *HeaderFooter) ApplyFunc(pdf *fpdf.Fpdf, fn fnc)
• type Item
  • func (i *Item) Prepare() error
• type Options
• type Tax
  • func (t *Tax) Prepare() error
• type UnicodeTranslateFunc

Constants

const (
	// Invoice define the "invoice" document type
	Invoice string = "INVOICE"

	// Quotation define the "quotation" document type
	Quotation string = "QUOTATION"

	// DeliveryNote define the "delievry note" document type
	DeliveryNote string = "DELIVERY_NOTE"

	// BaseMargin define base margin used in documents
	BaseMargin float64 = 10

	// BaseMarginTop define base margin top used in documents
	BaseMarginTop float64 = 20

	// HeaderMarginTop define base header margin top used in documents
	HeaderMarginTop float64 = 5

	// MaxPageHeight define the maximum height for a single page
	MaxPageHeight float64 = 260
)

const (
	// ItemColNameOffset ...
	ItemColNameOffset float64 = 10

	// ItemColUnitPriceOffset ...
	ItemColUnitPriceOffset float64 = 110

	// ItemColQuantityOffset ...
	ItemColQuantityOffset float64 = 150

	// ItemColTotalHTOffset ...
	ItemColTotalHTOffset float64 = 175

	// ItemColDiscountOffset ...
	ItemColDiscountOffset float64 = 140

	// ItemColTaxOffset ...
	ItemColTaxOffset float64 = 157

	// ItemColTotalTTCOffset ...
	ItemColTotalTTCOffset float64 = 175
)

Cols offsets

const (
	DiscountTypeAmount  string = "amount"
	DiscountTypePercent string = "percent"
)

Discount types

const (
	TaxTypeAmount  string = "amount"
	TaxTypePercent string = "percent"
)

Tax types

Variables

var (
	// BaseTextFontSize define the base font size for text in document
	BaseTextFontSize float64 = 8

	// SmallTextFontSize define the small font size for text in document
	SmallTextFontSize float64 = 7

	// ExtraSmallTextFontSize define the extra small font size for text in document
	ExtraSmallTextFontSize float64 = 6

	// LargeTextFontSize define the large font size for text in document
	LargeTextFontSize float64 = 10
)

var ErrInvalidDiscount = errors.New("invalid discount")

ErrInvalidDiscount when percent and amount are empty

var ErrInvalidDocumentType = errors.New("invalid document type")

var ErrInvalidTax = errors.New("invalid tax")

ErrInvalidTax when percent and amount are empty

Types

type Address

type Address struct {
	Address    string `json:"address,omitempty" validate:"required"`
	Address2   string `json:"address_2,omitempty"`
	PostalCode string `json:"postal_code,omitempty"`
	City       string `json:"city,omitempty"`
	Country    string `json:"country,omitempty"`
}

Address represent an address

func (*Address) ToString

func (a *Address) ToString() string

ToString output address as string Line break are added for new lines

type Contact

type Contact struct {
	Name    string   `json:"name,omitempty" validate:"required,min=1,max=256"`
	Logo    []byte   `json:"logo,omitempty"` // Logo byte array
	Address *Address `json:"address,omitempty"`

	// AddtionnalInfo to append after contact informations. You can use basic html here (bold, italic tags).
	AddtionnalInfo []string `json:"additional_info,omitempty"`
}

Contact contact a company informations

type Discount

type Discount struct {
	Percent string `json:"percent,omitempty"` // Discount in percent ex 17
	Amount  string `json:"amount,omitempty"`  // Discount in amount ex 123.40
	// contains filtered or unexported fields
}

Discount define discount as percent or fixed amount

func (*Discount) Prepare

func (d *Discount) Prepare() error

Prepare convert strings to decimal

type Document

type Document struct {
	Options      *Options      `json:"options,omitempty"`
	Header       *HeaderFooter `json:"header,omitempty"`
	Footer       *HeaderFooter `json:"footer,omitempty"`
	Type         string        `json:"type,omitempty" validate:"required,oneof=INVOICE DELIVERY_NOTE QUOTATION"`
	Ref          string        `json:"ref,omitempty" validate:"required,min=1,max=32"`
	Version      string        `json:"version,omitempty" validate:"max=32"`
	ClientRef    string        `json:"client_ref,omitempty" validate:"max=64"`
	Description  string        `json:"description,omitempty" validate:"max=1024"`
	Notes        string        `json:"notes,omitempty"`
	Company      *Contact      `json:"company,omitempty" validate:"required"`
	Customer     *Contact      `json:"customer,omitempty" validate:"required"`
	Items        []*Item       `json:"items,omitempty"`
	Date         string        `json:"date,omitempty"`
	ValidityDate string        `json:"validity_date,omitempty"`
	PaymentTerm  string        `json:"payment_term,omitempty"`
	DefaultTax   *Tax          `json:"default_tax,omitempty"`
	Discount     *Discount     `json:"discount,omitempty"`

	CustomTotal    string
	CustomTax      string
	CustomTaxRate  string
	CustomSubtotal string
	// contains filtered or unexported fields
}

Document define base document

func New

func New(docType string, options *Options) (*Document, error)

New return a new documents with provided types and defaults

func (*Document) AppendItem

func (d *Document) AppendItem(item *Item) *Document

AppendItem to document items

func (*Document) Build

func (doc *Document) Build() (*fpdf.Fpdf, error)

Build pdf document from data provided

func (*Document) Pdf

func (doc *Document) Pdf() *fpdf.Fpdf

Pdf returns the underlying *fpdf.Fpdf used to build document

func (*Document) SetCompany

func (d *Document) SetCompany(company *Contact) *Document

SetCompany of document

func (*Document) SetCustomer

func (d *Document) SetCustomer(customer *Contact) *Document

SetCustomer of document

func (*Document) SetDate

func (d *Document) SetDate(date string) *Document

SetDate of document

func (*Document) SetDefaultTax

func (d *Document) SetDefaultTax(tax *Tax) *Document

SetDefaultTax of document

func (*Document) SetDescription

func (d *Document) SetDescription(desc string) *Document

SetDescription of document

func (*Document) SetDiscount

func (d *Document) SetDiscount(discount *Discount) *Document

SetDiscount of document

func (*Document) SetFooter

func (d *Document) SetFooter(footer *HeaderFooter) *Document

SetFooter set footer of document

func (*Document) SetHeader

func (d *Document) SetHeader(header *HeaderFooter) *Document

SetHeader set header of document

func (*Document) SetNotes

func (d *Document) SetNotes(notes string) *Document

SetNotes of document

func (*Document) SetPaymentTerm

func (d *Document) SetPaymentTerm(term string) *Document

SetPaymentTerm of document

func (*Document) SetRef

func (d *Document) SetRef(ref string) *Document

SetRef of document

func (*Document) SetType

func (d *Document) SetType(docType string) *Document

SetType set type of document

func (*Document) SetUnicodeTranslator

func (doc *Document) SetUnicodeTranslator(fn UnicodeTranslateFunc)

SetUnicodeTranslator to use See https://pkg.go.dev/github.com/go-pdf/fpdf#UnicodeTranslator

func (*Document) SetVersion

func (d *Document) SetVersion(version string) *Document

SetVersion of document

func (*Document) Validate

func (d *Document) Validate() error

Validate document fields

type HeaderFooter

type HeaderFooter struct {
	UseCustomFunc bool    `json:"-"`
	Text          string  `json:"text,omitempty"`
	FontSize      float64 `json:"font_size,omitempty" default:"7"`
	Pagination    bool    `json:"pagination,omitempty"`
}

HeaderFooter define header or footer informations on document

func (*HeaderFooter) ApplyFunc

func (hf *HeaderFooter) ApplyFunc(pdf *fpdf.Fpdf, fn fnc)

ApplyFunc allow user to apply custom func

type Item

type Item struct {
	Name        string    `json:"name,omitempty" validate:"required"`
	Description string    `json:"description,omitempty"`
	UnitCost    string    `json:"unit_cost,omitempty"`
	Quantity    string    `json:"quantity,omitempty"`
	Tax         *Tax      `json:"tax,omitempty"`
	Discount    *Discount `json:"discount,omitempty"`
	Total       string    `json:"total,omitempty"`
	// contains filtered or unexported fields
}

Item represent a 'product' or a 'service'

func (*Item) Prepare

func (i *Item) Prepare() error

Prepare convert strings to decimal

type Options

type Options struct {
	AutoPrint bool `json:"auto_print,omitempty"`

	CurrencySymbol    string `default:"€ " json:"currency_symbol,omitempty"`
	CurrencyPrecision int    `default:"2" json:"currency_precision,omitempty"`
	CurrencyDecimal   string `default:"." json:"currency_decimal,omitempty"`
	CurrencyThousand  string `default:" " json:"currency_thousand,omitempty"`

	TextTypeInvoice      string `default:"INVOICE" json:"text_type_invoice,omitempty"`
	TextTypeQuotation    string `default:"QUOTATION" json:"text_type_quotation,omitempty"`
	TextTypeDeliveryNote string `default:"DELIVERY NOTE" json:"text_type_delivery_note,omitempty"`

	TextRefTitle         string `default:"Ref." json:"text_ref_title,omitempty"`
	TextVersionTitle     string `default:"Version" json:"text_version_title,omitempty"`
	TextDateTitle        string `default:"Date" json:"text_date_title,omitempty"`
	TextPaymentTermTitle string `default:"Payment term" json:"text_payment_term_title,omitempty"`

	TextItemsNameTitle     string `default:"Name" json:"text_items_name_title,omitempty"`
	TextItemsUnitCostTitle string `default:"Unit price" json:"text_items_unit_cost_title,omitempty"`
	TextItemsQuantityTitle string `default:"Qty" json:"text_items_quantity_title,omitempty"`
	TextItemsTotalHTTitle  string `default:"Total no tax" json:"text_items_total_ht_title,omitempty"`
	TextItemsTaxTitle      string `default:"Tax" json:"text_items_tax_title,omitempty"`
	TextItemsDiscountTitle string `default:"Discount" json:"text_items_discount_title,omitempty"`
	TextItemsTotalTTCTitle string `default:"Total" json:"text_items_total_ttc_title,omitempty"`

	TextTotalTotal      string `default:"TOTAL" json:"text_total_total,omitempty"`
	TextTotalDiscounted string `default:"TOTAL DISCOUNTED" json:"text_total_discounted,omitempty"`
	TextTotalTax        string `default:"TAX" json:"text_total_tax,omitempty"`
	TextTotalWithTax    string `default:"TOTAL WITH TAX" json:"text_total_with_tax,omitempty"`

	BaseTextColor []int `default:"[35,35,35]" json:"base_text_color,omitempty"`
	GreyTextColor []int `default:"[82,82,82]" json:"grey_text_color,omitempty"`
	GreyBgColor   []int `default:"[232,232,232]" json:"grey_bg_color,omitempty"`
	DarkBgColor   []int `default:"[212,212,212]" json:"dark_bg_color,omitempty"`

	Font     string `default:"Helvetica"`
	BoldFont string `default:"Helvetica"`

	UnicodeTranslateFunc UnicodeTranslateFunc
}

Options for Document

type Tax

type Tax struct {
	Percent string `json:"percent,omitempty"` // Tax in percent ex 17
	Amount  string `json:"amount,omitempty"`  // Tax in amount ex 123.40
	// contains filtered or unexported fields
}

Tax define tax as percent or fixed amount

func (*Tax) Prepare

func (t *Tax) Prepare() error

Prepare convert strings to decimal

type UnicodeTranslateFunc

type UnicodeTranslateFunc func(string) string

UnicodeTranslateFunc ...