Adding upstream version 0.28.1.

Signed-off-by: Daniel Baumann <daniel@debian.org>

plugins/jsvm/form_data.go

@@ -0,0 +1,149 @@
+package jsvm
+
+import (
+	"bytes"
+	"io"
+	"mime/multipart"
+
+	"github.com/pocketbase/pocketbase/tools/filesystem"
+	"github.com/spf13/cast"
+)
+
+// FormData represents an interface similar to the browser's [FormData].
+//
+// The value of each FormData entry must be a string or [*filesystem.File] instance.
+//
+// It is intended to be used together with the JSVM `$http.send` when
+// sending multipart/form-data requests.
+//
+// [FormData]: https://developer.mozilla.org/en-US/docs/Web/API/FormData.
+type FormData map[string][]any
+
+// Append appends a new value onto an existing key inside the current FormData,
+// or adds the key if it does not already exist.
+func (data FormData) Append(key string, value any) {
+	data[key] = append(data[key], value)
+}
+
+// Set sets a new value for an existing key inside the current FormData,
+// or adds the key/value if it does not already exist.
+func (data FormData) Set(key string, value any) {
+	data[key] = []any{value}
+}
+
+// Delete deletes a key and its value(s) from the current FormData.
+func (data FormData) Delete(key string) {
+	delete(data, key)
+}
+
+// Get returns the first value associated with a given key from
+// within the current FormData.
+//
+// If you expect multiple values and want all of them,
+// use the [FormData.GetAll] method instead.
+func (data FormData) Get(key string) any {
+	values, ok := data[key]
+	if !ok || len(values) == 0 {
+		return nil
+	}
+
+	return values[0]
+}
+
+// GetAll returns all the values associated with a given key
+// from within the current FormData.
+func (data FormData) GetAll(key string) []any {
+	values, ok := data[key]
+	if !ok {
+		return nil
+	}
+
+	return values
+}
+
+// Has returns whether a FormData object contains a certain key.
+func (data FormData) Has(key string) bool {
+	values, ok := data[key]
+
+	return ok && len(values) > 0
+}
+
+// Keys returns all keys contained in the current FormData.
+func (data FormData) Keys() []string {
+	result := make([]string, 0, len(data))
+
+	for k := range data {
+		result = append(result, k)
+	}
+
+	return result
+}
+
+// Keys returns all values contained in the current FormData.
+func (data FormData) Values() []any {
+	result := make([]any, 0, len(data))
+
+	for _, values := range data {
+		result = append(result, values...)
+	}
+
+	return result
+}
+
+// Entries returns a [key, value] slice pair for each FormData entry.
+func (data FormData) Entries() [][]any {
+	result := make([][]any, 0, len(data))
+
+	for k, values := range data {
+		for _, v := range values {
+			result = append(result, []any{k, v})
+		}
+	}
+
+	return result
+}
+
+// toMultipart converts the current FormData entries into multipart encoded data.
+func (data FormData) toMultipart() (*bytes.Buffer, *multipart.Writer, error) {
+	body := new(bytes.Buffer)
+
+	mp := multipart.NewWriter(body)
+	defer mp.Close()
+
+	for k, values := range data {
+		for _, rawValue := range values {
+			switch v := rawValue.(type) {
+			case *filesystem.File:
+				err := func() error {
+					mpw, err := mp.CreateFormFile(k, v.OriginalName)
+					if err != nil {
+						return err
+					}
+
+					file, err := v.Reader.Open()
+					if err != nil {
+						return err
+					}
+					defer file.Close()
+
+					_, err = io.Copy(mpw, file)
+					if err != nil {
+						return err
+					}
+
+					return nil
+				}()
+				if err != nil {
+					return nil, nil, err
+				}
+			default:
+				err := mp.WriteField(k, cast.ToString(v))
+				if err != nil {
+					return nil, nil, err
+				}
+			}
+		}
+	}
+
+	return body, mp, nil
+}