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templating/templates.go

@@ -0,0 +1,103 @@
+package templating
+
+import (
+	"io/fs"
+	"log/slog"
+	"path/filepath"
+	"slices"
+	"strings"
+	"sync"
+)
+
+// TODO: redo template parsing to allow for just rendering single components
+type File struct {
+	Name string
+	Path string
+	Ext  string
+}
+
+func FromDirEntry(entry fs.DirEntry, path string) File {
+	ext := filepath.Ext(entry.Name())
+	Name := strings.TrimSuffix(entry.Name(), ext)
+	return File{
+		Name: Name,
+		Ext:  ext,
+		Path: path,
+	}
+}
+
+type Directory struct {
+	Path    string
+	Locals  map[string]File
+	Globals map[string]File
+}
+
+type Templates struct {
+	Directories sync.Map // map[string]*Directory
+}
+
+func (t *Templates) NewDirectory(path string, fsys fs.FS) (*Directory, error) {
+	fspath := PathToFSPath(path)
+	entries, err := fs.ReadDir(fsys, fspath)
+
+	wg := &sync.WaitGroup{}
+
+	if err != nil {
+		return nil, NewError(FileAccessError, fspath)
+	}
+
+	dir := &Directory{}
+	for _, file := range entries {
+		if file.IsDir() && file.Name() == TEMPLATE_COMPONENT_DIRECTORY {
+			wg.Add(1)
+			go func() {
+				defer wg.Done()
+				locals, globals, err := t.ScanComponentDirectory(filepath.Join(fspath, file.Name()), fsys)
+				if err != nil {
+					slog.Error("Failed to scan component directory", "path", file.Name(), "error", err)
+					return
+				}
+				dir.Locals = locals
+				dir.Globals = globals
+			}()
+		}
+
+		if !slices.Contains(TEMPLATE_FORMATS, filepath.Ext(file.Name())) {
+			continue
+		}
+
+	}
+
+	wg.Wait()
+	return dir, nil
+}
+
+func (t *Templates) ScanComponentDirectory(path string, fsys fs.FS) (map[string]File, map[string]File, error) {
+	locals := make(map[string]File)
+	globals := make(map[string]File)
+	fspath := PathToFSPath(path)
+	err := fs.WalkDir(fsys, fspath, func(path string, d fs.DirEntry, err error) error {
+		if err != nil {
+			return NewError(FileAccessError, path)
+		}
+
+		if d.IsDir() || !slices.Contains(TEMPLATE_FORMATS, filepath.Ext(d.Name())) {
+			return nil
+		}
+
+		f := FromDirEntry(d, path)
+		if strings.HasPrefix(f.Name, TEMPLATE_GLOBAL_PREFIX) {
+			globals[f.Name] = f
+		} else {
+			locals[f.Name] = f
+		}
+
+		return nil
+	})
+
+	if err != nil {
+		return nil, nil, NewError(FileAccessError, path)
+	}
+
+	return locals, globals, nil
+}