mirror of https://github.com/knative/pkg.git
96 lines
2.6 KiB
Go
96 lines
2.6 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_read.go includes functions to read messages from 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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"html"
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"net/url"
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"os"
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"strconv"
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"strings"
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"time"
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)
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const conversationHistoryURL = "https://slack.com/api/conversations.history"
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// ReadOperations defines the read operations that can be done to Slack
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type ReadOperations interface {
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MessageHistory(channel string, startTime time.Time) ([]string, error)
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}
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// readClient contains Slack bot related information to perform read operations
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type readClient struct {
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userName string
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tokenStr string
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}
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// NewReadClient reads token file and stores it for later authentication
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func NewReadClient(userName, tokenPath string) (ReadOperations, error) {
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b, err := os.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 &readClient{
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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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// MessageHistory returns the list of messages sent by the user in the given
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// channel since the given startTime.
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func (c *readClient) MessageHistory(channel string, startTime time.Time) ([]string, error) {
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u, _ := url.Parse(conversationHistoryURL)
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q := u.Query()
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q.Add("token", c.tokenStr)
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q.Add("channel", channel)
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q.Add("oldest", strconv.FormatInt(startTime.Unix(), 10))
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u.RawQuery = q.Encode()
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content, err := get(u.String())
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if err != nil {
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return nil, 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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type m struct {
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Text string `json:"text"`
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UserName string `json:"username"`
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}
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var r struct {
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OK bool `json:"ok"`
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Messages []m `json:"messages"`
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}
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if err = json.Unmarshal(content, &r); nil != err || !r.OK {
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return nil, fmt.Errorf("response not ok '%s'", string(content))
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}
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res := make([]string, 0)
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for _, message := range r.Messages {
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if message.UserName == c.userName {
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// the message text queried from Slack will be escaped,
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// so we unescape it to restore to the original text
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res = append(res, html.UnescapeString(message.Text))
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}
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}
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return res, nil
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}
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