mirror of
https://github.com/foxcpp/maddy.git
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bf188e454f
The intention is to keep to repo root clean while the list of packages is slowly growing. Additionally, a bunch of small (~30 LoC) files in the repo root is merged into a single maddy.go file, for the same reason. Most of the internal code is moved into the internal/ directory. Go toolchain will make it impossible to import these packages from external applications. Some packages are renamed and moved into the pkg/ directory in the root. According to https://github.com/golang-standards/project-layout this is the de-facto standard to place "library code that's ok to use by external applications" in. To clearly define the purpose of top-level directories, README.md files are added to each.
78 lines
1.7 KiB
Go
78 lines
1.7 KiB
Go
package modify
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import (
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"github.com/emersion/go-message/textproto"
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"github.com/foxcpp/maddy/internal/buffer"
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"github.com/foxcpp/maddy/internal/module"
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)
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type (
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// Group wraps multiple modifiers and runs them serially.
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Group struct {
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Modifiers []module.Modifier
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}
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groupState struct {
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states []module.ModifierState
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}
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)
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func (g Group) ModStateForMsg(msgMeta *module.MsgMetadata) (module.ModifierState, error) {
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gs := groupState{}
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for _, modifier := range g.Modifiers {
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state, err := modifier.ModStateForMsg(msgMeta)
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if err != nil {
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// Free state objects we initialized already.
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for _, state := range gs.states {
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state.Close()
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}
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return nil, err
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}
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gs.states = append(gs.states, state)
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}
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return gs, nil
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}
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func (gs groupState) RewriteSender(mailFrom string) (string, error) {
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var err error
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for _, state := range gs.states {
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mailFrom, err = state.RewriteSender(mailFrom)
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if err != nil {
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return "", err
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}
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}
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return mailFrom, nil
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}
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func (gs groupState) RewriteRcpt(rcptTo string) (string, error) {
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var err error
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for _, state := range gs.states {
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rcptTo, err = state.RewriteRcpt(rcptTo)
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if err != nil {
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return "", err
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}
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}
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return rcptTo, nil
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}
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func (gs groupState) RewriteBody(h *textproto.Header, body buffer.Buffer) error {
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for _, state := range gs.states {
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if err := state.RewriteBody(h, body); err != nil {
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return err
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}
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}
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return nil
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}
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func (gs groupState) Close() error {
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// We still try close all state objects to minimize
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// resource leaks when Close fails for one object..
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var lastErr error
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for _, state := range gs.states {
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if err := state.Close(); err != nil {
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lastErr = err
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}
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}
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return lastErr
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}
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