1 files changed, 137 insertions, 0 deletions
diff --git a/pkg/app/list/utils.go b/pkg/app/list/utils.go
new file mode 100644
index 0000000..07dbc65
--- /dev/null
+++ b/pkg/app/list/utils.go
@@ -0,0 +1,137 @@
+// miscellaneous utility functions used for the landing page of the application
+
+package list
+
+import (
+	"archives/pkg/database"
+	"archives/pkg/models"
+	"github.com/go-pg/pg/v10/orm"
+	"html/template"
+	"net/http"
+)
+
+type ListData struct {
+	ListName    string
+	Date        string
+	CurrentPage int
+	MaxPages    int
+	Messages    []*models.Message
+}
+
+// renderIndexTemplate renders all templates used for the landing page
+func renderShowTemplate(w http.ResponseWriter, listName string, messageData interface{}) {
+	templates := template.Must(
+		template.Must(
+			template.New("Show").
+				ParseGlob("web/templates/layout/*.tmpl")).
+			ParseGlob("web/templates/list/*.tmpl"))
+
+	templteData := struct {
+		ListName    string
+		MessageData interface{}
+	}{
+		ListName:    listName,
+		MessageData: messageData,
+	}
+
+	templates.ExecuteTemplate(w, "show.tmpl", templteData)
+}
+
+// renderIndexTemplate renders all templates used for the landing page
+func renderMessagesTemplate(w http.ResponseWriter, listName string, date string, currentPage int, maxPages int, messages []*models.Message) {
+	templates := template.Must(
+		template.Must(
+			template.Must(
+				template.New("Show").
+					Funcs(getFuncMap()).
+					ParseGlob("web/templates/layout/*.tmpl")).
+				ParseGlob("web/templates/list/components/*.tmpl")).
+			ParseGlob("web/templates/list/*.tmpl"))
+
+	templates.ExecuteTemplate(w, "messages.tmpl", buildListData(listName, date, currentPage, maxPages, messages))
+}
+
+// renderIndexTemplate renders all templates used for the landing page
+func renderThreadsTemplate(w http.ResponseWriter, listName string, date string, currentPage int, maxPages int, messages []*models.Message) {
+	templates := template.Must(
+		template.Must(
+			template.Must(
+				template.New("Show").
+					Funcs(getFuncMap()).
+					ParseGlob("web/templates/layout/*.tmpl")).
+				ParseGlob("web/templates/list/components/*.tmpl")).
+			ParseGlob("web/templates/list/*.tmpl"))
+
+	templates.ExecuteTemplate(w, "threads.tmpl", buildListData(listName, date, currentPage, maxPages, messages))
+}
+
+// renderIndexTemplate renders all templates used for the landing page
+func renderBrowseTemplate(w http.ResponseWriter, lists interface{}) {
+	templates := template.Must(
+		template.Must(
+			template.New("Show").
+				ParseGlob("web/templates/layout/*.tmpl")).
+			ParseGlob("web/templates/list/*.tmpl"))
+
+	templates.ExecuteTemplate(w, "browse.tmpl", lists)
+}
+
+// utility methods
+
+func getFuncMap() template.FuncMap {
+	return template.FuncMap{
+		"min": func(a, b int) int {
+			if a < b {
+				return a
+			}
+			return b
+		},
+		"max": func(a, b int) int {
+			if a < b {
+				return b
+			}
+			return a
+		},
+		"add": func(a, b int) int {
+			return a + b
+		},
+		"sub": func(a, b int) int {
+			return a - b
+		},
+		"makeRange": makeRange,
+	}
+}
+
+func buildListData(listName string, date string, currentPage int, maxPages int, messages []*models.Message) ListData {
+	return ListData{
+		ListName:    listName,
+		Date:        date,
+		CurrentPage: currentPage,
+		MaxPages:    maxPages,
+		Messages:    messages,
+	}
+}
+
+func makeRange(min, max int) []int {
+	a := make([]int, max-min+1)
+	for i := range a {
+		a[i] = min + i
+	}
+	return a
+}
+
+func countMessages(listName string) (int, error) {
+	return database.DBCon.Model((*models.Message)(nil)).
+		WhereGroup(func(q *orm.Query) (*orm.Query, error) {
+			q = q.WhereOr(`(headers::jsonb->>'Subject')::jsonb->>0 LIKE '[` + listName + `]%'`).
+				WhereOr(`(headers::jsonb->>'Subject')::jsonb->>0 LIKE 'Re: [` + listName + `]%'`)
+			return q, nil
+		}).
+		WhereGroup(func(q *orm.Query) (*orm.Query, error) {
+			q = q.WhereOr(`headers::jsonb->>'To' LIKE '%` + listName + `@lists.gentoo.org%'`).
+				WhereOr(`headers::jsonb->>'Cc' LIKE '%` + listName + `@lists.gentoo.org%'`).
+				WhereOr(`headers::jsonb->>'To' LIKE '%` + listName + `@gentoo.org%'`).
+				WhereOr(`headers::jsonb->>'Cc' LIKE '%` + listName + `@gentoo.org%'`)
+			return q, nil
+		}).Count()
+}