Add Studio to movie and fix movie schema (#458)

* Add movie migration
* Update server and UI code for type changes
* Add studio to movies
* Movie blobs to end
* Document movie duration
* Add filtering on movie studio

pkg/database/functions.go

@@ -0,0 +1,37 @@
+package database
+
+import (
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+func regexFn(re, s string) (bool, error) {
+	return regexp.MatchString(re, s)
+}
+
+func durationToTinyIntFn(str string) (int64, error) {
+	splits := strings.Split(str, ":")
+
+	if len(splits) > 3 {
+		return 0, nil
+	}
+
+	seconds := 0
+	factor := 1
+	for len(splits) > 0 {
+		// pop the last split
+		var thisSplit string
+		thisSplit, splits = splits[len(splits)-1], splits[:len(splits)-1]
+
+		thisInt, err := strconv.Atoi(thisSplit)
+		if err != nil {
+			return 0, nil
+		}
+
+		seconds += factor * thisInt
+		factor *= 60
+	}
+
+	return int64(seconds), nil
+}