mirror of
https://github.com/jhillyerd/inbucket.git
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121 lines
2.8 KiB
Go
121 lines
2.8 KiB
Go
package luahost
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import (
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"net/mail"
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"time"
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"github.com/inbucket/inbucket/v3/pkg/extension/event"
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lua "github.com/yuin/gopher-lua"
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)
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const messageMetadataName = "message_metadata"
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func registerMessageMetadataType(ls *lua.LState) {
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mt := ls.NewTypeMetatable(messageMetadataName)
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ls.SetGlobal(messageMetadataName, mt)
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// Static attributes.
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ls.SetField(mt, "new", ls.NewFunction(newMessageMetadata))
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// Methods.
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ls.SetField(mt, "__index", ls.NewFunction(messageMetadataIndex))
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ls.SetField(mt, "__newindex", ls.NewFunction(messageMetadataNewIndex))
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}
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func newMessageMetadata(ls *lua.LState) int {
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val := &event.MessageMetadata{}
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ud := wrapMessageMetadata(ls, val)
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ls.Push(ud)
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return 1
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}
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func wrapMessageMetadata(ls *lua.LState, val *event.MessageMetadata) *lua.LUserData {
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ud := ls.NewUserData()
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ud.Value = val
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ls.SetMetatable(ud, ls.GetTypeMetatable(messageMetadataName))
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return ud
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}
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func checkMessageMetadata(ls *lua.LState, pos int) *event.MessageMetadata {
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ud := ls.CheckUserData(pos)
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if v, ok := ud.Value.(*event.MessageMetadata); ok {
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return v
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}
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ls.ArgError(1, messageMetadataName+" expected")
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return nil
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}
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// Gets a field value from MessageMetadata user object. This emulates a Lua table,
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// allowing `msg.subject` instead of a Lua object syntax of `msg:subject()`.
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func messageMetadataIndex(ls *lua.LState) int {
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m := checkMessageMetadata(ls, 1)
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field := ls.CheckString(2)
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// Push the requested field's value onto the stack.
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switch field {
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case "mailbox":
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ls.Push(lua.LString(m.Mailbox))
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case "id":
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ls.Push(lua.LString(m.ID))
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case "from":
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ls.Push(wrapMailAddress(ls, m.From))
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case "to":
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lt := &lua.LTable{}
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for _, v := range m.To {
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lt.Append(wrapMailAddress(ls, v))
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}
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ls.Push(lt)
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case "date":
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ls.Push(lua.LNumber(m.Date.Unix()))
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case "subject":
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ls.Push(lua.LString(m.Subject))
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case "size":
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ls.Push(lua.LNumber(m.Size))
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default:
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// Unknown field.
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ls.Push(lua.LNil)
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}
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return 1
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}
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// Sets a field value on MessageMetadata user object. This emulates a Lua table,
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// allowing `msg.subject = x` instead of a Lua object syntax of `msg:subject(x)`.
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func messageMetadataNewIndex(ls *lua.LState) int {
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m := checkMessageMetadata(ls, 1)
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index := ls.CheckString(2)
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switch index {
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case "mailbox":
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m.Mailbox = ls.CheckString(3)
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case "id":
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m.ID = ls.CheckString(3)
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case "from":
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m.From = checkMailAddress(ls, 3)
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case "to":
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lt := ls.CheckTable(3)
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to := make([]*mail.Address, 0, 16)
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lt.ForEach(func(k, lv lua.LValue) {
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if ud, ok := lv.(*lua.LUserData); ok {
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// TODO should fail if wrong type + test.
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if entry, ok := unwrapMailAddress(ud); ok {
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to = append(to, entry)
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}
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}
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})
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m.To = to
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case "date":
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m.Date = time.Unix(ls.CheckInt64(3), 0)
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case "subject":
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m.Subject = ls.CheckString(3)
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case "size":
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m.Size = ls.CheckInt64(3)
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default:
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ls.RaiseError("invalid index %q", index)
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}
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return 0
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}
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