Trigger expression evaluated and problems managed

problem.go

@@ -2,10 +2,10 @@ package main
 
 import (
 	// External
-	// we "git.gibonuddevalla.se/go/wrappederror"
+	we "git.gibonuddevalla.se/go/wrappederror"
 
 	// Standard
-	// "encoding/json"
+	"database/sql"
 )
 
 /*
@@ -18,3 +18,39 @@ type Problem struct {
 }
 */
 
+func ProblemStart(trigger Trigger) (err error) {
+	row := service.Db.Conn.QueryRow(`
+		SELECT COUNT(id)
+		FROM problem
+		WHERE
+			trigger_id = $1 AND
+			"end" IS NULL
+		GROUP BY trigger_id
+		`,
+		trigger.ID,
+	)
+	var openProblems int
+	err = row.Scan(&openProblems)
+	if err != nil && err != sql.ErrNoRows {
+		err = we.Wrap(err).WithData(trigger.ID)
+		return
+	}
+
+	// Open up a new problem if no open exists.
+	if openProblems == 0 {
+		_, err = service.Db.Conn.Exec(`INSERT INTO problem(trigger_id) VALUES($1)`, trigger.ID)
+		if err != nil {
+			err = we.Wrap(err).WithData(trigger)
+		}
+	}
+	return
+}
+
+func ProblemClose(trigger Trigger) (err error) {
+	_, err = service.Db.Conn.Exec(`UPDATE problem SET "end"=NOW() WHERE trigger_id=$1 AND "end" IS NULL`, trigger.ID)
+	if err != nil {
+		err = we.Wrap(err).WithData(trigger)
+		return
+	}
+	return
+}