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config.go
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config.go
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package main
import (
"fmt"
"log"
"os"
"path/filepath"
"photofield/internal/clip"
"photofield/internal/collection"
"photofield/internal/fs"
"photofield/internal/geo"
"photofield/internal/image"
"photofield/internal/layout"
"photofield/internal/render"
"photofield/tag"
"strings"
"github.com/goccy/go-yaml"
"github.com/imdario/mergo"
)
type AppConfig struct {
Collections []collection.Collection `json:"collections"`
ExpandedPaths []string `json:"-"`
Layout layout.Layout `json:"layout"`
Render render.Render `json:"render"`
Media image.Config `json:"media"`
AI clip.AI `json:"ai"`
Geo geo.Config `json:"geo"`
Tags tag.Config `json:"tags"`
TileRequests TileRequestConfig `json:"tile_requests"`
}
var CONFIG_FILENAME = "configuration.yaml"
func watchConfig(dataDir string, callback func(appConfig *AppConfig)) {
w, err := fs.NewFileWatcher(filepath.Join(dataDir, CONFIG_FILENAME))
if err != nil {
log.Fatalln("Unable to watch config", err)
}
var expandWatcher *fs.Watcher
var collectionsChanged chan fs.Event
var appConfig *AppConfig
reloadConfig := func() {
appConfig, err = loadConfig(dataDir)
if err != nil {
log.Fatalln("Unable to load config", err)
}
expandWatcher.Close()
if len(appConfig.ExpandedPaths) > 0 {
expandWatcher, err = fs.NewPathsWatcher(appConfig.ExpandedPaths)
if err != nil {
log.Fatalln("Unable to watch expanded paths", err)
}
collectionsChanged = expandWatcher.Events
}
callback(appConfig)
}
reloadConfig()
go func() {
defer w.Close()
for {
select {
case <-w.Events:
log.Println("config changed, reloading")
case e := <-collectionsChanged:
switch e.Op {
case fs.Update, fs.Rename:
if info, err := os.Stat(e.Path); err != nil || !info.IsDir() {
// Updated or renamed item was not a dir
continue
}
case fs.Remove:
removed := false
for _, collection := range appConfig.Collections {
for _, dir := range collection.Dirs {
if dir == e.Path {
removed = true
break
}
}
if removed {
break
}
}
if !removed {
// Removed item was not a collection dir
continue
}
}
log.Println("collection changed, reloading")
}
reloadConfig()
}
}()
}
func initDefaults() {
if err := yaml.Unmarshal(defaultsYaml, &defaults); err != nil {
panic(err)
}
}
func loadConfig(dataDir string) (*AppConfig, error) {
path := filepath.Join(dataDir, CONFIG_FILENAME)
var appConfig AppConfig
log.Printf("config path %v", path)
bytes, err := os.ReadFile(path)
if err == nil {
if err := yaml.Unmarshal(bytes, &appConfig); err != nil {
return nil, fmt.Errorf("unable to parse %s: %w", path, err)
} else if err := mergo.Merge(&appConfig, defaults); err != nil {
return nil, fmt.Errorf("unable to merge defaults: %w", err)
}
} else {
log.Printf("config read failed (using defaults) for %s: %v", path, err)
appConfig = defaults
}
// Expand collections
expanded := make([]collection.Collection, 0, len(appConfig.Collections))
expandedDirs := make(map[string]bool) // Track deduplicated dirs
for _, collection := range appConfig.Collections {
if collection.ExpandSubdirs {
for _, dir := range collection.Dirs {
expandedDirs[dir] = true
}
expanded = append(expanded, collection.Expand()...)
} else {
expanded = append(expanded, collection)
}
}
appConfig.Collections = expanded
appConfig.ExpandedPaths = make([]string, 0, len(expandedDirs))
for dir := range expandedDirs {
appConfig.ExpandedPaths = append(appConfig.ExpandedPaths, dir)
}
for i := range appConfig.Collections {
collection := &appConfig.Collections[i]
collection.GenerateId()
collection.Layout = strings.ToUpper(collection.Layout)
if collection.Limit > 0 && collection.IndexLimit == 0 {
collection.IndexLimit = collection.Limit
}
}
appConfig.Media.AI = appConfig.AI
appConfig.Media.DataDir = dataDir
appConfig.Tags.Enable = appConfig.Tags.Enable || appConfig.Tags.Enabled
return &appConfig, nil
}