initial commit

config.go

@@ -0,0 +1,49 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+)
+
+// Config holds the web-only proof-of-concept server settings plus invoice
+// defaults. It is read at startup only; edits made on the Settings page are
+// kept in memory and are reset with the rest of the POC data every 10 minutes.
+type Config struct {
+	// Where the web server listens. Caddy can reverse-proxy to this.
+	ListenAddr string `json:"listen_addr"`
+
+	// Invoice / company details (editable in Settings for the current in-memory run).
+	CompanyName      string  `json:"company_name"`
+	CompanyAddress   string  `json:"company_address"`
+	CompanyPhone     string  `json:"company_phone"`
+	CompanyEmail     string  `json:"company_email"`
+	CompanyWeb       string  `json:"company_web"`
+	TaxID            string  `json:"tax_id"`
+	BankInfo         string  `json:"bank_info"`
+	PaymentTermsDays int     `json:"payment_terms_days"`
+	MVGPercent       float64 `json:"mvg_percent"`
+}
+
+func loadConfig(path string) (Config, error) {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return Config{}, fmt.Errorf("cannot read config %s: %w", path, err)
+	}
+
+	var cfg Config
+	if err := json.Unmarshal(data, &cfg); err != nil {
+		return Config{}, fmt.Errorf("cannot parse config: %w", err)
+	}
+
+	if cfg.ListenAddr == "" {
+		cfg.ListenAddr = "127.0.0.1:8081"
+	}
+	if cfg.PaymentTermsDays <= 0 {
+		cfg.PaymentTermsDays = 8
+	}
+	if cfg.MVGPercent <= 0 {
+		cfg.MVGPercent = 25
+	}
+	return cfg, nil
+}