Restructure go project (#2356)

* Move main to cmd
* Move api to internal
* Move logger and manager to internal
* Move shell hiding code to separate package
* Decouple job from desktop and utils
* Decouple session from config
* Move static into internal
* Decouple config from dlna
* Move desktop to internal
* Move dlna to internal
* Decouple remaining packages from config
* Move config into internal
* Move jsonschema and paths to models
* Make ffmpeg functions private
* Move file utility methods into fsutil package
* Move symwalk into fsutil
* Move single-use util functions into client package
* Move slice functions to separate packages
* Add env var to suppress windowsgui arg
* Move hash functions into separate package
* Move identify to internal
* Move autotag to internal
* Touch UI when generating backend

pkg/models/jsonschema/mappings.go

@@ -0,0 +1,47 @@
+package jsonschema
+
+import (
+	"fmt"
+	"os"
+
+	jsoniter "github.com/json-iterator/go"
+)
+
+type PathNameMapping struct {
+	Path     string `json:"path,omitempty"`
+	Name     string `json:"name,omitempty"`
+	Checksum string `json:"checksum"`
+}
+
+type Mappings struct {
+	Tags       []PathNameMapping `json:"tags"`
+	Performers []PathNameMapping `json:"performers"`
+	Studios    []PathNameMapping `json:"studios"`
+	Movies     []PathNameMapping `json:"movies"`
+	Galleries  []PathNameMapping `json:"galleries"`
+	Scenes     []PathNameMapping `json:"scenes"`
+	Images     []PathNameMapping `json:"images"`
+}
+
+func LoadMappingsFile(filePath string) (*Mappings, error) {
+	var mappings Mappings
+	file, err := os.Open(filePath)
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+	var json = jsoniter.ConfigCompatibleWithStandardLibrary
+	jsonParser := json.NewDecoder(file)
+	err = jsonParser.Decode(&mappings)
+	if err != nil {
+		return nil, err
+	}
+	return &mappings, nil
+}
+
+func SaveMappingsFile(filePath string, mappings *Mappings) error {
+	if mappings == nil {
+		return fmt.Errorf("mappings must not be nil")
+	}
+	return marshalToFile(filePath, mappings)
+}