separate main code into different files (unsub, helpers)

2025-12-06 11:16:20 -06:00 · 2023-12-26 16:58:04 -06:00
parent d504bd1b2e
commit ef7ca9f16e
4 changed files with 168 additions and 148 deletions
--- a/unsub.go
+++ b/unsub.go
@@ -0,0 +1,106 @@
+package main
+
+import (
+	"crypto/sha256"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"net/url"
+	"strings"
+
+	"github.com/rs/zerolog/log"
+	"github.com/samber/lo"
+)
+
+func Unsubscribe(email string) (*ConfirmationResponse, error) {
+	mktTok := "ODM5LU1PTC01NTIAAAGQRiDbOUWzUhLliVDxTHjxLfZDD1y0MxC47Wf_1C9UTbwEej3Tckhn_QteZR7p5Mpl3_f0ioPUyQ8XUceJ9a0PiOUJb_O3YIj8PwKNQEm4SseaSw"
+
+	// Build referrer URL
+	referrerUrl, _ := url.Parse("http://www2.thescla.org/UnsubscribePage.html")
+	query := referrerUrl.Query()
+	query.Add("mkt_unsubscribe", "1")
+	query.Add("mkt_tok", mktTok)
+	referrerUrl.RawQuery = query.Encode()
+
+	// Build lpUrl
+	thing := "839-MOL-552"
+	lpUrl := fmt.Sprintf("http://%s.mktoweb.com/lp/%s/UnsubscribePage.html?cr={creative}&kw={keyword}", thing, thing)
+
+	values := url.Values{
+		"Email":         {email},
+		"Unsubscribed":  {"Yes"},
+		"formid":        {"1"},
+		"lpId":          {"1"},
+		"subId":         {"98"},
+		"munchkinId":    {thing},
+		"lpurl":         {lpUrl},
+		"followupLpId":  {"2"},
+		"cr":            {""},
+		"kw":            {""},
+		"q":             {""},
+		"_mkt_trk":      {""},
+		"formVid":       {"1"},
+		"mkt_tok":       {mktTok},
+		"_mktoReferrer": {referrerUrl.String()},
+	}
+
+	// Grab checksum fields
+	fields := make([]string, 0, len(values))
+	for key, _ := range values {
+		fields = append(fields, key)
+	}
+	values.Set("checksumFields", strings.Join(fields, ","))
+
+	// Calculate checksum
+	checksum := sha256.Sum256([]byte(strings.Join(
+		lo.Map(fields, func(field string, _ int) string {
+			return values.Get(field)
+		}), "|")))
+
+	values.Set("checksum", fmt.Sprintf("%x", checksum))
+
+	// Make request
+	request, _ := http.NewRequest("POST", "http://www2.thescla.org/index.php/leadCapture/save2", strings.NewReader(values.Encode()))
+	request.Header.Set("Referer", "http://www2.thescla.org/UnsubscribePage.html?mkt_unsubscribe=1")
+	request.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+	request.Header.Set("X-Requested-With", "XMLHttpRequest")
+	ApplyHeaders(request)
+
+	// Send request
+	response, body, err := DoRequest(request)
+	if err != nil {
+		panic(err)
+	}
+
+	if response.StatusCode != 200 {
+		// If JSON returned, parse the message for the error
+		contentType := response.Header.Get("Content-Type")
+		if !strings.Contains(contentType, "application/json") {
+			return nil, UnsubscribeUnexpectedError{Message: string(body), Code: response.StatusCode}
+		}
+
+		// Parse the JSON
+		var errorResponse ErrorResponse
+		err := json.Unmarshal(body, &errorResponse)
+		if err != nil {
+			log.Error().Err(err).Msg("Error parsing error response")
+			return nil, UnsubscribeUnexpectedError{Message: string(body), Code: response.StatusCode}
+		}
+
+		switch errorResponse.Message {
+		case "checksum invalid":
+			return nil, ChecksumInvalidError(checksum)
+		case "checksum missing":
+			return nil, ChecksumMissingError(checksum)
+		case "Rejected":
+			return nil, UnsubscribeRejectedError(errorResponse.Message)
+		}
+
+		log.Error().Str("content-type", contentType).Str("body", string(body)).Msg("Unknown Error")
+		return nil, UnsubscribeUnexpectedError{Message: string(body), Code: response.StatusCode}
+	}
+
+	var confirmation ConfirmationResponse
+	json.Unmarshal(body, &confirmation)
+	return &confirmation, nil
+}