124 lines
2.8 KiB
Go
124 lines
2.8 KiB
Go
package push
|
|
|
|
import (
|
|
"strings"
|
|
"text/template"
|
|
"time"
|
|
|
|
"github.com/Masterminds/sprig/v3"
|
|
"github.com/evcc-io/evcc/util"
|
|
)
|
|
|
|
// Event is a notification event
|
|
type Event struct {
|
|
LoadPoint *int // optional loadpoint id
|
|
Event string
|
|
}
|
|
|
|
// EventTemplateConfig is the push message configuration for an event
|
|
type EventTemplateConfig struct {
|
|
Title, Msg string
|
|
}
|
|
|
|
// EventTemplate is the push message template for an event
|
|
type EventTemplate struct {
|
|
Title, Msg *template.Template
|
|
}
|
|
|
|
// Hub subscribes to event notifications and sends them to client devices
|
|
type Hub struct {
|
|
definitions map[string]EventTemplate
|
|
sender []Sender
|
|
cache *util.Cache
|
|
}
|
|
|
|
// NewHub creates push hub with definitions and receiver
|
|
func NewHub(cc map[string]EventTemplateConfig, cache *util.Cache) (*Hub, error) {
|
|
definitions := make(map[string]EventTemplate)
|
|
|
|
// instantiate all event templates
|
|
for k, v := range cc {
|
|
var def EventTemplate
|
|
var err error
|
|
|
|
def.Title, err = template.New("out").Funcs(template.FuncMap(sprig.FuncMap())).Parse(v.Title)
|
|
if err == nil {
|
|
def.Msg, err = template.New("out").Funcs(template.FuncMap(sprig.FuncMap())).Parse(v.Msg)
|
|
}
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
definitions[k] = def
|
|
}
|
|
|
|
h := &Hub{
|
|
definitions: definitions,
|
|
cache: cache,
|
|
}
|
|
|
|
return h, nil
|
|
}
|
|
|
|
// Add adds a sender to the list of senders
|
|
func (h *Hub) Add(sender Sender) {
|
|
h.sender = append(h.sender, sender)
|
|
}
|
|
|
|
// apply applies the event template to the content to produce the actual message
|
|
func (h *Hub) apply(ev Event, tmpl *template.Template) (string, error) {
|
|
attr := make(map[string]interface{})
|
|
|
|
// let cache catch up, refs reverted https://github.com/evcc-io/evcc/pull/445
|
|
time.Sleep(100 * time.Millisecond)
|
|
|
|
// get all values from cache
|
|
for _, p := range h.cache.All() {
|
|
if p.LoadPoint == nil || ev.LoadPoint == p.LoadPoint {
|
|
attr[p.Key] = p.Val
|
|
}
|
|
}
|
|
|
|
// apply data attributes to template using sprig functions
|
|
applied := new(strings.Builder)
|
|
if err := tmpl.Execute(applied, attr); err != nil {
|
|
return "", err
|
|
}
|
|
|
|
return util.ReplaceFormatted(applied.String(), attr)
|
|
}
|
|
|
|
// Run is the Hub's main publishing loop
|
|
func (h *Hub) Run(events <-chan Event) {
|
|
for ev := range events {
|
|
if len(h.sender) == 0 {
|
|
continue
|
|
}
|
|
|
|
definition, ok := h.definitions[ev.Event]
|
|
if !ok {
|
|
continue
|
|
}
|
|
|
|
title, err := h.apply(ev, definition.Title)
|
|
if err != nil {
|
|
log.ERROR.Printf("invalid title template for %s: %v", ev.Event, err)
|
|
continue
|
|
}
|
|
|
|
msg, err := h.apply(ev, definition.Msg)
|
|
if err != nil {
|
|
log.ERROR.Printf("invalid message template for %s: %v", ev.Event, err)
|
|
continue
|
|
}
|
|
|
|
for _, sender := range h.sender {
|
|
if strings.TrimSpace(msg) != "" {
|
|
go sender.Send(title, msg)
|
|
} else {
|
|
log.DEBUG.Printf("did not send empty message template for %s: %v", ev.Event, err)
|
|
}
|
|
}
|
|
}
|
|
}
|