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35 lines
1011 B
35 lines
1011 B
3 years ago
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package action
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import (
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"errors"
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"go.uber.org/zap/zapcore"
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"hexmap-server/state"
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)
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// ErrNoTransparentColors is returned when a user tries to set their active color or a cell color to transparent.
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// Transparent here is defined as having an alpha component of less than 15 (0xF).
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var ErrNoTransparentColors error = errors.New("transparent colors not allowed")
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// UserActiveColor is the action sent when the user's current color, the one being painted with, changes.
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type UserActiveColor struct {
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// Color is the color that is now active.
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Color state.HexColor `json:"color"`
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}
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func (c UserActiveColor) MarshalLogObject(encoder zapcore.ObjectEncoder) error {
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encoder.AddString("color", c.Color.String())
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return nil
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}
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// Apply sets the user's active color, or returns ErrNoOp if it can't.
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func (c UserActiveColor) Apply(s *state.Synced) error {
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if c.Color.A < 0xF {
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return ErrNoTransparentColors
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}
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if s.User.ActiveColor == c.Color {
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return ErrNoOp
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}
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s.User.ActiveColor = c.Color
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return nil
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}
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