refactor: move dwn wasm build to pkg directory

pkg/dwn/embed.go

@@ -0,0 +1,76 @@
+package dwn
+
+import (
+	"bytes"
+	"context"
+	_ "embed"
+	"encoding/json"
+
+	"github.com/a-h/templ"
+	"github.com/ipfs/boxo/files"
+)
+
+//go:embed app.wasm
+var dwnWasmData []byte
+
+//go:embed motr.mjs
+var motrMJSData []byte
+
+//go:embed sw.js
+var swJSData []byte
+
+var (
+	dwnWasmFile = files.NewBytesFile(dwnWasmData)
+	motrMJSFile = files.NewBytesFile(motrMJSData)
+	swJSFile    = files.NewBytesFile(swJSData)
+)
+
+// NewVaultDirectory creates a new directory with the default files
+func NewVaultDirectory(cnfg *Config) (files.Node, error) {
+	dwnJSON, err := json.Marshal(cnfg)
+	if err != nil {
+		return nil, err
+	}
+
+	dwnStr, err := templ.JSONString(cnfg)
+	if err != nil {
+		return nil, err
+	}
+	w := bytes.NewBuffer(nil)
+	err = indexFile(dwnStr).Render(context.Background(), w)
+	if err != nil {
+		return nil, err
+	}
+	fileMap := map[string]files.Node{
+		"config.json": files.NewBytesFile(dwnJSON),
+		"motr.mjs":    motrMJSFile,
+		"sw.js":       swJSFile,
+		"app.wasm":    dwnWasmFile,
+		"index.html":  files.NewBytesFile(w.Bytes()),
+	}
+	return files.NewMapDirectory(fileMap), nil
+}
+
+// Use IndexHTML template to generate the index file
+func IndexHTMLFile(c *Config) (files.Node, error) {
+	str, err := templ.JSONString(c)
+	if err != nil {
+		return nil, err
+	}
+	w := bytes.NewBuffer(nil)
+	err = indexFile(str).Render(context.Background(), w)
+	if err != nil {
+		return nil, err
+	}
+	indexData := w.Bytes()
+	return files.NewBytesFile(indexData), nil
+}
+
+// MarshalConfigFile uses the config template to generate the dwn config file
+func MarshalConfigFile(c *Config) (files.Node, error) {
+	dwnConfigData, err := json.Marshal(c)
+	if err != nil {
+		return nil, err
+	}
+	return files.NewBytesFile(dwnConfigData), nil
+}