mention regex better but not 100% there

internal/processing/synchronous/status/create.go

@@ -16,6 +16,7 @@ func (p *processor) Create(account *gtsmodel.Account, application *gtsmodel.Appl
 	thisStatusID := uuid.NewString()
 	thisStatusURI := fmt.Sprintf("%s/%s", uris.StatusesURI, thisStatusID)
 	thisStatusURL := fmt.Sprintf("%s/%s", uris.StatusesURL, thisStatusID)
+
 	newStatus := &gtsmodel.Status{
 		ID:                       thisStatusID,
 		URI:                      thisStatusURI,
@@ -66,6 +67,10 @@ func (p *processor) Create(account *gtsmodel.Account, application *gtsmodel.Appl
 		return nil, gtserror.NewErrorInternalError(err)
 	}
 
+	if err := p.processContent(form, account.ID, newStatus); err != nil {
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+
 	// put the new status in the database, generating an ID for it in the process
 	if err := p.db.Put(newStatus); err != nil {
 		return nil, gtserror.NewErrorInternalError(err)

internal/processing/synchronous/status/util.go

@@ -3,6 +3,7 @@ package status
 import (
 	"errors"
 	"fmt"
+	"strings"
 
 	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
 	"github.com/superseriousbusiness/gotosocial/internal/db"
@@ -228,3 +229,28 @@ func (p *processor) processEmojis(form *apimodel.AdvancedStatusCreateForm, accou
 	status.Emojis = emojis
 	return nil
 }
+
+func (p *processor) processContent(form *apimodel.AdvancedStatusCreateForm, accountID string, status *gtsmodel.Status) error {
+	if form.Status == "" {
+		status.Content = ""
+		return nil
+	}
+
+	// surround the whole status in '<p>'
+	content := fmt.Sprintf(`<p>%s</p>`, form.Status)
+
+	// format mentions nicely
+	for _, menchie := range status.GTSMentions {
+		targetAccount := &gtsmodel.Account{}
+		if err := p.db.GetByID(menchie.TargetAccountID, targetAccount); err == nil {
+			mentionContent := fmt.Sprintf(`<span class="h-card"><a href="%s" class="u-url mention">@<span>%s</span></a></span>`, targetAccount.URL, targetAccount.Username)
+			content = strings.ReplaceAll(content, menchie.NameString, mentionContent)
+		}
+	}
+
+	// replace newlines with breaks
+	content = strings.ReplaceAll(content, "\n", "<br />")
+
+	status.Content = content
+	return nil
+}