Separate graphql API from rest of the system (#2503)

* Move graphql generated files to api
* Refactor identify options
* Remove models.StashBoxes
* Move ScraperSource to scraper package
* Rename field strategy enums
* Rename identify.TaskOptions to Options

pkg/models/model_file.go

@@ -1,6 +1,53 @@
 package models
 
-import "time"
+import (
+	"fmt"
+	"io"
+	"strconv"
+	"time"
+)
+
+type HashAlgorithm string
+
+const (
+	HashAlgorithmMd5 HashAlgorithm = "MD5"
+	// oshash
+	HashAlgorithmOshash HashAlgorithm = "OSHASH"
+)
+
+var AllHashAlgorithm = []HashAlgorithm{
+	HashAlgorithmMd5,
+	HashAlgorithmOshash,
+}
+
+func (e HashAlgorithm) IsValid() bool {
+	switch e {
+	case HashAlgorithmMd5, HashAlgorithmOshash:
+		return true
+	}
+	return false
+}
+
+func (e HashAlgorithm) String() string {
+	return string(e)
+}
+
+func (e *HashAlgorithm) UnmarshalGQL(v interface{}) error {
+	str, ok := v.(string)
+	if !ok {
+		return fmt.Errorf("enums must be strings")
+	}
+
+	*e = HashAlgorithm(str)
+	if !e.IsValid() {
+		return fmt.Errorf("%s is not a valid HashAlgorithm", str)
+	}
+	return nil
+}
+
+func (e HashAlgorithm) MarshalGQL(w io.Writer) {
+	fmt.Fprint(w, strconv.Quote(e.String()))
+}
 
 type File struct {
 	Checksum    string    `db:"checksum" json:"checksum"`