fix: {“message":"Error compiling template: error compiling message: template: content:2: unexpected \"\u003e\" in operand”} error in campaign preview.

Signed-off-by: Hiram Chirino <hiram@hiramchirino.com>

Author: chirino

go.mod

@@ -29,6 +29,7 @@ require (
 	github.com/paulbellamy/ratecounter v0.2.0
 	github.com/rhnvrm/simples3 v0.8.3
 	github.com/spf13/pflag v1.0.5
+	github.com/yosssi/gohtml v0.0.0-20201013000340-ee4748c638f4
 	github.com/yuin/goldmark v1.6.0
 	github.com/zerodha/easyjson v1.0.0
 	golang.org/x/mod v0.14.0

go.sum

@@ -132,6 +132,8 @@ github.com/valyala/bytebufferpool v1.0.0 h1:GqA5TC/0021Y/b9FG4Oi9Mr3q7XYx6Kllzaw
 github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc=
 github.com/valyala/fasttemplate v1.2.2 h1:lxLXG0uE3Qnshl9QyaK6XJxMXlQZELvChBOCmQD0Loo=
 github.com/valyala/fasttemplate v1.2.2/go.mod h1:KHLXt3tVN2HBp8eijSv/kGJopbvo7S+qRAEEKiv+SiQ=
+github.com/yosssi/gohtml v0.0.0-20201013000340-ee4748c638f4 h1:0sw0nJM544SpsihWx1bkXdYLQDlzRflMgFJQ4Yih9ts=
+github.com/yosssi/gohtml v0.0.0-20201013000340-ee4748c638f4/go.mod h1:+ccdNT0xMY1dtc5XBxumbYfOUhmduiGudqaDgD2rVRE=
 github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
 github.com/yuin/goldmark v1.6.0 h1:boZcn2GTjpsynOsC0iJHnBWa4Bi0qzfJjthwauItG68=
 github.com/yuin/goldmark v1.6.0/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=

models/models.go

@@ -6,6 +6,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"github.com/yosssi/gohtml"
 	"html/template"
 	"net/textproto"
 	"regexp"
@@ -569,6 +570,8 @@ func (c *Campaign) CompileTemplate(f template.FuncMap) error {
 		body = c.Body
 	}
 
+	body = gohtml.Format(body)
+
 	// Compile the campaign message.
 	for _, r := range regTplFuncs {
 		body = r.regExp.ReplaceAllString(body, r.replace)