forked from git.klmp200.net/ALFRED
125 lines
2.5 KiB
Go
125 lines
2.5 KiB
Go
/*
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* @Author: Bartuccio Antoine
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* @Date: 2018-07-24 01:27:11
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* @Last Modified by: klmp200
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* @Last Modified time: 2018-07-24 12:54:21
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*/
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package shared
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import (
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"encoding/json"
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"io/ioutil"
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"sync"
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)
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type history struct {
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mutex sync.Mutex
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size int
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data map[int64][]string
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}
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type historyFile struct {
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mutex sync.Mutex
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path string
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}
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var History history
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var hf historyFile
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// Init a chat history of a given size
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func InitHistory(size int, history_file_path string) {
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hf = historyFile{}
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hf.path = history_file_path
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History = history{}
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History.mutex.Lock()
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defer History.mutex.Unlock()
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History.size = size
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History.data = make(map[int64][]string)
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hf.read()
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}
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// Get the number of messages saved in the history
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func (h history) Size() int {
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h.mutex.Lock()
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defer h.mutex.Unlock()
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return h.size
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}
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// Get a selected message in a chat history
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func (h history) Message(chatID int64, n int) string {
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h.mutex.Lock()
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defer h.mutex.Unlock()
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array, exists := h.data[chatID]
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if exists && n >= 0 && n < len(array) {
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return array[n]
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}
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return ""
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}
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// Append a message to a given chat
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func (h history) AddMessage(chatID int64, m string) {
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h.mutex.Lock()
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defer h.mutex.Unlock()
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if _, exists := h.data[chatID]; !exists {
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h.data[chatID] = make([]string, h.size, h.size)
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}
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h.append(chatID, m)
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}
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// Get the last message of a given chat
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func (h history) LastMessage(chatID int64) string {
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h.mutex.Lock()
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defer h.mutex.Unlock()
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if _, exists := h.data[chatID]; exists {
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return h.data[chatID][h.size-1]
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}
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return ""
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}
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// Get a copy of a given chat history
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func (h history) ChatHistory(chatID int64) []string {
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h.mutex.Lock()
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defer h.mutex.Unlock()
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array, exists := h.data[chatID]
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if exists {
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c := make([]string, h.size, h.size)
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copy(c, array)
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return c
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}
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return nil
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}
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// Add a message at the end of a chat and move everithyng up
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// Assert that the slice exists and mutex already locked
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func (h history) append(chatID int64, m string) {
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c := make([]string, h.size-1, h.size-1)
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array, _ := h.data[chatID]
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copy(c, array[1:])
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for i, val := range c {
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array[i] = val
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}
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array[h.size-1] = m
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go hf.write()
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}
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func (h historyFile) read() {
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h.mutex.Lock()
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defer h.mutex.Unlock()
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data, err := ioutil.ReadFile(h.path)
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if err != nil {
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// File doesn't exist, skip import
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return
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}
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json.Unmarshal(data, &History.data)
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}
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func (h historyFile) write() {
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h.mutex.Lock()
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defer h.mutex.Unlock()
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History.mutex.Lock()
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defer History.mutex.Unlock()
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data, _ := json.Marshal(History.data)
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ioutil.WriteFile(h.path, data, 0770)
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}
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