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4d4c06b480
* vendor latest wire into pkg/build * use vendored wire in builds * fix wire import path * remove wire from bingo * also support google/wire import * make prettier happy * change package in tess * add debug walk for drone * add wire_gen in tests * remove debug walk * restore imports
84 lines
2.0 KiB
Go
84 lines
2.0 KiB
Go
// Copyright 2018 The Wire Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// The greeter binary simulates an event with greeters greeting guests.
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package main
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import (
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"errors"
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"fmt"
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"os"
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"time"
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)
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// Message is what greeters will use to greet guests.
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type Message string
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// NewMessage creates a default Message.
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func NewMessage(phrase string) Message {
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return Message(phrase)
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}
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// NewGreeter initializes a Greeter. If the current epoch time is an even
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// number, NewGreeter will create a grumpy Greeter.
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func NewGreeter(m Message) Greeter {
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var grumpy bool
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if time.Now().Unix()%2 == 0 {
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grumpy = true
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}
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return Greeter{Message: m, Grumpy: grumpy}
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}
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// Greeter is the type charged with greeting guests.
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type Greeter struct {
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Grumpy bool
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Message Message
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}
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// Greet produces a greeting for guests.
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func (g Greeter) Greet() Message {
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if g.Grumpy {
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return Message("Go away!")
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}
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return g.Message
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}
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// NewEvent creates an event with the specified greeter.
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func NewEvent(g Greeter) (Event, error) {
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if g.Grumpy {
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return Event{}, errors.New("could not create event: event greeter is grumpy")
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}
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return Event{Greeter: g}, nil
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}
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// Event is a gathering with greeters.
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type Event struct {
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Greeter Greeter
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}
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// Start ensures the event starts with greeting all guests.
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func (e Event) Start() {
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msg := e.Greeter.Greet()
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fmt.Println(msg)
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}
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func main() {
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e, err := InitializeEvent("hi there!")
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if err != nil {
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fmt.Printf("failed to create event: %s\n", err)
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os.Exit(2)
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}
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e.Start()
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}
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