032c426ac3
GUI packages, examples, and documentation for building desktop applications with Go and web technologies. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
127 lines
3.4 KiB
Go
127 lines
3.4 KiB
Go
package io
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import (
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"errors"
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"github.com/host-uk/core-gui/pkg/io/local"
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)
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// Medium defines the standard interface for a storage backend.
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// This allows for different implementations (e.g., local disk, S3, SFTP)
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// to be used interchangeably.
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type Medium interface {
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// Read retrieves the content of a file as a string.
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Read(path string) (string, error)
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// Write saves the given content to a file, overwriting it if it exists.
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Write(path, content string) error
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// EnsureDir makes sure a directory exists, creating it if necessary.
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EnsureDir(path string) error
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// IsFile checks if a path exists and is a regular file.
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IsFile(path string) bool
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// FileGet is a convenience function that reads a file from the medium.
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FileGet(path string) (string, error)
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// FileSet is a convenience function that writes a file to the medium.
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FileSet(path, content string) error
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}
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// Local is a pre-initialized medium for the local filesystem.
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// It uses "/" as root, providing unsandboxed access to the filesystem.
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// For sandboxed access, create a new local.Medium with a specific root path.
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var Local Medium
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func init() {
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var err error
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Local, err = local.New("/")
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if err != nil {
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panic("io: failed to initialize Local medium: " + err.Error())
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}
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}
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// --- Helper Functions ---
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// Read retrieves the content of a file from the given medium.
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func Read(m Medium, path string) (string, error) {
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return m.Read(path)
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}
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// Write saves the given content to a file in the given medium.
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func Write(m Medium, path, content string) error {
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return m.Write(path, content)
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}
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// EnsureDir makes sure a directory exists in the given medium.
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func EnsureDir(m Medium, path string) error {
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return m.EnsureDir(path)
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}
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// IsFile checks if a path exists and is a regular file in the given medium.
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func IsFile(m Medium, path string) bool {
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return m.IsFile(path)
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}
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// Copy copies a file from one medium to another.
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func Copy(src Medium, srcPath string, dst Medium, dstPath string) error {
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content, err := src.Read(srcPath)
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if err != nil {
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return err
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}
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return dst.Write(dstPath, content)
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}
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// --- MockMedium ---
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// MockMedium is an in-memory implementation of Medium for testing.
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type MockMedium struct {
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Files map[string]string
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Dirs map[string]bool
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}
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// NewMockMedium creates a new MockMedium instance.
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func NewMockMedium() *MockMedium {
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return &MockMedium{
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Files: make(map[string]string),
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Dirs: make(map[string]bool),
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}
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}
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// Read retrieves the content of a file from the mock filesystem.
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func (m *MockMedium) Read(path string) (string, error) {
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content, ok := m.Files[path]
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if !ok {
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return "", errors.New("file not found: " + path)
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}
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return content, nil
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}
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// Write saves the given content to a file in the mock filesystem.
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func (m *MockMedium) Write(path, content string) error {
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m.Files[path] = content
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return nil
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}
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// EnsureDir records that a directory exists in the mock filesystem.
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func (m *MockMedium) EnsureDir(path string) error {
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m.Dirs[path] = true
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return nil
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}
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// IsFile checks if a path exists as a file in the mock filesystem.
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func (m *MockMedium) IsFile(path string) bool {
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_, ok := m.Files[path]
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return ok
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}
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// FileGet is a convenience function that reads a file from the mock filesystem.
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func (m *MockMedium) FileGet(path string) (string, error) {
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return m.Read(path)
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}
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// FileSet is a convenience function that writes a file to the mock filesystem.
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func (m *MockMedium) FileSet(path, content string) error {
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return m.Write(path, content)
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}
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