// Copyright 2017 Frédéric Guillot. All rights reserved.
// Use of this source code is governed by the Apache 2.0
// license that can be found in the LICENSE file.

package form // import "miniflux.app/ui/form"

import (
	"net/http"
	"strconv"

	"miniflux.app/errors"
	"miniflux.app/validator"
)

// SubscriptionForm represents the subscription form.
type SubscriptionForm struct {
	URL                         string
	CategoryID                  int64
	Crawler                     bool
	FetchViaProxy               bool
	AllowSelfSignedCertificates bool
	UserAgent                   string
	Cookie                      string
	Username                    string
	Password                    string
	ScraperRules                string
	RewriteRules                string
	BlocklistRules              string
	KeeplistRules               string
	UrlRewriteRules             string
}

// Validate makes sure the form values are valid.
func (s *SubscriptionForm) Validate() error {
	if s.URL == "" || s.CategoryID == 0 {
		return errors.NewLocalizedError("error.feed_mandatory_fields")
	}

	if !validator.IsValidURL(s.URL) {
		return errors.NewLocalizedError("error.invalid_feed_url")
	}

	if !validator.IsValidRegex(s.BlocklistRules) {
		return errors.NewLocalizedError("error.feed_invalid_blocklist_rule")
	}

	if !validator.IsValidRegex(s.KeeplistRules) {
		return errors.NewLocalizedError("error.feed_invalid_keeplist_rule")
	}

	if !validator.IsValidRegex(s.UrlRewriteRules) {
		return errors.NewLocalizedError("error.feed_invalid_urlrewrite_rule")
	}

	return nil
}

// NewSubscriptionForm returns a new SubscriptionForm.
func NewSubscriptionForm(r *http.Request) *SubscriptionForm {
	categoryID, err := strconv.Atoi(r.FormValue("category_id"))
	if err != nil {
		categoryID = 0
	}

	return &SubscriptionForm{
		URL:                         r.FormValue("url"),
		CategoryID:                  int64(categoryID),
		Crawler:                     r.FormValue("crawler") == "1",
		AllowSelfSignedCertificates: r.FormValue("allow_self_signed_certificates") == "1",
		FetchViaProxy:               r.FormValue("fetch_via_proxy") == "1",
		UserAgent:                   r.FormValue("user_agent"),
		Cookie:                      r.FormValue("cookie"),
		Username:                    r.FormValue("feed_username"),
		Password:                    r.FormValue("feed_password"),
		ScraperRules:                r.FormValue("scraper_rules"),
		RewriteRules:                r.FormValue("rewrite_rules"),
		BlocklistRules:              r.FormValue("blocklist_rules"),
		KeeplistRules:               r.FormValue("keeplist_rules"),
		UrlRewriteRules:             r.FormValue("urlrewrite_rules"),
	}
}