mirror of https://github.com/knative/pkg.git
78 lines
1.9 KiB
Go
78 lines
1.9 KiB
Go
/*
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Copyright 2019 The Knative Authors
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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// message_write.go includes functions to send messages to Slack.
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package slackutil
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"strings"
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"net/url"
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)
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const postMessageURL = "https://slack.com/api/chat.postMessage"
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// WriteOperations defines the write operations that can be done to Slack
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type WriteOperations interface {
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Post(text, channel string) error
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}
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// writeClient contains Slack bot related information to perform write operations
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type writeClient struct {
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userName string
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tokenStr string
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}
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// NewWriteClient reads token file and stores it for later authentication
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func NewWriteClient(userName, tokenPath string) (WriteOperations, error) {
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b, err := ioutil.ReadFile(tokenPath)
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if err != nil {
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return nil, err
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}
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return &writeClient{
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userName: userName,
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tokenStr: strings.TrimSpace(string(b)),
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}, nil
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}
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// Post posts the given text to channel
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func (c *writeClient) Post(text, channel string) error {
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uv := url.Values{}
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uv.Add("username", c.userName)
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uv.Add("token", c.tokenStr)
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uv.Add("channel", channel)
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uv.Add("text", text)
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content, err := post(postMessageURL, uv)
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if err != nil {
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return err
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}
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// response code could also be 200 if channel doesn't exist, parse response body to find out
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var b struct {
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OK bool `json:"ok"`
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}
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if err = json.Unmarshal(content, &b); nil != err || !b.OK {
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return fmt.Errorf("response not ok '%s'", string(content))
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}
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return nil
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}
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