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Merge branch 'sync-store' into develop

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This commit is contained in:
Lea Anthony 2020-09-04 20:19:20 +10:00
commit ef79dd95cf
20 changed files with 5019 additions and 189 deletions
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2
runtime/assets/wails.js
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2
runtime/js/core/main.js
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@ -15,6 +15,7 @@ import { NewBinding } from './bindings';
import { Callback } from './calls';
import { AddScript, InjectCSS } from './utils';
import { AddIPCListener } from './ipc';
import * as Store from './store';
// Initialise global if not already
window.wails = window.wails || {};
@ -42,6 +43,7 @@ var runtime = {
Heartbeat,
Acknowledge,
},
Store,
_: internal,
};

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runtime/js/core/store.js Normal file
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@ -0,0 +1,82 @@
/*
_ __ _ __
| | / /___ _(_) /____
| | /| / / __ `/ / / ___/
| |/ |/ / /_/ / / (__ )
|__/|__/\__,_/_/_/____/
The lightweight framework for web-like apps
(c) Lea Anthony 2019-present
*/
/* jshint esversion: 6 */
/**
* Creates a new sync store with the given name and optional default value
*
* @export
* @param {string} name
* @param {*} optionalDefault
*/
export function New(name, optionalDefault) {
var data;
// Check we are initialised
if( !window.wails) {
throw Error('Wails is not initialised');
}
// Store for the callbacks
let callbacks = [];
// Subscribe to updates by providing a callback
this.subscribe = (callback) => {
callbacks.push(callback);
};
// sets the store data to the provided `newdata` value
this.set = (newdata) => {
data = newdata;
// Emit a notification to back end
window.wails.Events.Emit('wails:sync:store:updatedbyfrontend:'+name, JSON.stringify(data));
// Notify callbacks
callbacks.forEach( function(callback) {
callback(data);
});
};
// update mutates the value in the store by calling the
// provided method with the current value. The value returned
// by the updater function will be set as the new store value
this.update = (updater) => {
var newValue = updater(data);
this.set(newValue);
};
// Setup event callback
window.wails.Events.On('wails:sync:store:updatedbybackend:'+name, function(result) {
// Parse data
result = JSON.parse(result);
// Todo: Potential preprocessing?
// Save data
data = result;
// Notify callbacks
callbacks.forEach( function(callback) {
callback(data);
});
});
// Set to the optional default if set
if( optionalDefault ) {
this.set(optionalDefault);
}
return this;
}

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runtime/js/runtime/main.js
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@ -13,10 +13,12 @@ const Log = require('./log');
const Browser = require('./browser');
const Events = require('./events');
const Init = require('./init');
const Store = require('./store');
module.exports = {
Log: Log,
Browser: Browser,
Events: Events,
Init: Init
Init: Init,
Store: Store,
};

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@ -0,0 +1,492 @@
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"resolved": "https://registry.npmjs.org/window-size/-/window-size-0.2.0.tgz",
"integrity": "sha1-tDFbtCFKPXBY6+7okuE/ok2YsHU=",
"dev": true
},
"wrap-ansi": {
"version": "2.1.0",
"resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
"integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
"dev": true,
"requires": {
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"strip-ansi": "^3.0.1"
}
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"resolved": "https://registry.npmjs.org/y18n/-/y18n-3.2.1.tgz",
"integrity": "sha1-bRX7qITAhnnA136I53WegR4H+kE=",
"dev": true
},
"yargs": {
"version": "4.8.1",
"resolved": "https://registry.npmjs.org/yargs/-/yargs-4.8.1.tgz",
"integrity": "sha1-wMQpJMpKqmsObaFznfshZDn53cA=",
"dev": true,
"requires": {
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"decamelize": "^1.1.1",
"get-caller-file": "^1.0.1",
"lodash.assign": "^4.0.3",
"os-locale": "^1.4.0",
"read-pkg-up": "^1.0.1",
"require-directory": "^2.1.1",
"require-main-filename": "^1.0.1",
"set-blocking": "^2.0.0",
"string-width": "^1.0.1",
"which-module": "^1.0.0",
"window-size": "^0.2.0",
"y18n": "^3.2.1",
"yargs-parser": "^2.4.1"
}
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"version": "2.4.1",
"resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-2.4.1.tgz",
"integrity": "sha1-hVaN488VD/SfpRgl8DqMiA3cxcQ=",
"dev": true,
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}

4
runtime/js/runtime/package.json
View file

@ -1,6 +1,6 @@
{
"name": "@wailsapp/runtime",
"version": "1.0.11",
"version": "1.1.0",
"description": "Wails Javascript runtime library",
"main": "main.js",
"types": "runtime.d.ts",
@ -25,4 +25,4 @@
"devDependencies": {
"dts-gen": "^0.5.8"
}
}
}

3
runtime/js/runtime/runtime.d.ts vendored
View file

@ -21,6 +21,9 @@ declare const wailsapp__runtime: {
Info(message: string): void;
Warning(message: string): void;
};
Store: {
New(name: string, optionalDefault?: any): any;
};
};

27
runtime/js/runtime/store.js Normal file
View file

@ -0,0 +1,27 @@
/*
_ __ _ __
| | / /___ _(_) /____
| | /| / / __ `/ / / ___/
| |/ |/ / /_/ / / (__ )
|__/|__/\__,_/_/_/____/
The lightweight framework for web-like apps
(c) Lea Anthony 2019-present
*/
/* jshint esversion: 6 */
/**
* Create a new Store with the given name and optional default value
*
* @export
* @param {string} name
* @param {*} optionalDefault
*/
function New(name, optionalDefault) {
return window.wails.Store.New(name, optionalDefault);
}
module.exports = {
New: New,
};

29
runtime/runtime.go Normal file
View file

@ -0,0 +1,29 @@
package runtime
import "github.com/wailsapp/wails/lib/interfaces"
// Runtime is the Wails Runtime Interface, given to a user who has defined the WailsInit method
type Runtime struct {
Events *Events
Log *Log
Dialog *Dialog
Window *Window
Browser *Browser
FileSystem *FileSystem
Store *StoreProvider
}
// NewRuntime creates a new Runtime struct
func NewRuntime(eventManager interfaces.EventManager, renderer interfaces.Renderer) *Runtime {
result := &Runtime{
Events: NewEvents(eventManager),
Log: NewLog(),
Dialog: NewDialog(renderer),
Window: NewWindow(renderer),
Browser: NewBrowser(),
FileSystem: NewFileSystem(),
}
// We need a reference to itself
result.Store = NewStoreProvider(result)
return result
}

248
runtime/store.go Normal file
View file

@ -0,0 +1,248 @@
// Package runtime contains all the methods and data structures related to the
// runtime library of Wails. This includes both Go and JS runtimes.
package runtime
import (
"bytes"
"encoding/json"
"fmt"
"log"
"reflect"
"sync"
)
// Options defines the optional data that may be used
// when creating a Store
type Options struct {
// The name of the store
Name string
// The runtime to attach the store to
Runtime *Runtime
// Indicates if notifying Go listeners should be notified of updates
// synchronously (on the current thread) or asynchronously using
// goroutines
NotifySynchronously bool
}
// StoreProvider is a struct that creates Stores
type StoreProvider struct {
runtime *Runtime
}
// NewStoreProvider creates new stores using the provided Runtime reference.
func NewStoreProvider(runtime *Runtime) *StoreProvider {
return &StoreProvider{
runtime: runtime,
}
}
// Store is where we keep named data
type Store struct {
name string
data reflect.Value
dataType reflect.Type
eventPrefix string
callbacks []func(interface{})
runtime *Runtime
notifySynchronously bool
// Lock
mux sync.Mutex
// Error handler
errorHandler func(error)
}
// New creates a new store
func (p *StoreProvider) New(name string, defaultValue interface{}) *Store {
dataType := reflect.TypeOf(defaultValue)
result := Store{
name: name,
runtime: p.runtime,
data: reflect.ValueOf(defaultValue),
dataType: dataType,
}
// Setup the sync listener
result.setupListener()
return &result
}
// OnError takes a function that will be called
// whenever an error occurs
func (s *Store) OnError(callback func(error)) {
s.errorHandler = callback
}
// Processes the updates sent by the front end
func (s *Store) processUpdatedData(data string) error {
// Decode incoming data
var rawdata json.RawMessage
d := json.NewDecoder(bytes.NewBufferString(data))
err := d.Decode(&rawdata)
if err != nil {
return err
}
// Create a new instance of our data and unmarshal
// the received value into it
newData := reflect.New(s.dataType).Interface()
err = json.Unmarshal(rawdata, &newData)
if err != nil {
return err
}
// Lock mutex for writing
s.mux.Lock()
// Handle nulls
if newData == nil {
s.data = reflect.Zero(s.dataType)
} else {
// Store the resultant value in the data store
s.data = reflect.ValueOf(newData).Elem()
}
// Unlock mutex
s.mux.Unlock()
return nil
}
// Setup listener for front end changes
func (s *Store) setupListener() {
// Listen for updates from the front end
s.runtime.Events.On("wails:sync:store:updatedbyfrontend:"+s.name, func(data ...interface{}) {
// Process the incoming data
err := s.processUpdatedData(data[0].(string))
if err != nil {
if s.errorHandler != nil {
s.errorHandler(err)
return
}
}
// Notify listeners
s.notify()
})
}
// notify the listeners of the current data state
func (s *Store) notify() {
// Execute callbacks
for _, callback := range s.callbacks {
if s.notifySynchronously {
callback(s.data)
} else {
go callback(s.data)
}
}
}
// Set will update the data held by the store
// and notify listeners of the change
func (s *Store) Set(data interface{}) error {
inType := reflect.TypeOf(data)
if inType != s.dataType {
return fmt.Errorf("invalid data given in Store.Set(). Expected %s, got %s", s.dataType.String(), inType.String())
}
// Save data
s.mux.Lock()
s.data = reflect.ValueOf(data)
s.mux.Unlock()
// Stringify data
newdata, err := json.Marshal(data)
if err != nil {
if s.errorHandler != nil {
return err
}
}
// Emit event to front end
s.runtime.Events.Emit("wails:sync:store:updatedbybackend:"+s.name, string(newdata))
// Notify subscribers
s.notify()
return nil
}
// Subscribe will subscribe to updates to the store by
// providing a callback. Any updates to the store are sent
// to the callback
func (s *Store) Subscribe(callback func(interface{})) {
s.callbacks = append(s.callbacks, callback)
}
// updaterCheck ensures the given function to Update() is
// of the correct signature. Absolutely cannot wait for
// generics to land rather than writing this nonsense.
func (s *Store) updaterCheck(updater interface{}) error {
// Get type
updaterType := reflect.TypeOf(updater)
// Check updater is a function
if updaterType.Kind() != reflect.Func {
return fmt.Errorf("invalid value given to store.Update(). Expected 'func(%s) %s'", s.dataType.String(), s.dataType.String())
}
// Check input param
if updaterType.NumIn() != 1 {
return fmt.Errorf("invalid number of parameters given in updater function. Expected 1")
}
// Check input data type
if updaterType.In(0) != s.dataType {
return fmt.Errorf("invalid type for input parameter given in updater function. Expected %s, got %s", s.dataType.String(), updaterType.In(0))
}
// Check output param
if updaterType.NumOut() != 1 {
return fmt.Errorf("invalid number of return parameters given in updater function. Expected 1")
}
// Check output data type
if updaterType.Out(0) != s.dataType {
return fmt.Errorf("invalid type for return parameter given in updater function. Expected %s, got %s", s.dataType.String(), updaterType.Out(0))
}
return nil
}
// Update takes a function that is passed the current state.
// The result of that function is then set as the new state
// of the store. This will notify listeners of the change
func (s *Store) Update(updater interface{}) {
err := s.updaterCheck(updater)
if err != nil {
log.Fatal(err)
}
// Build args
args := []reflect.Value{s.data}
// Make call
results := reflect.ValueOf(updater).Call(args)
// We will only have 1 result. Set the store to it
s.Set(results[0].Interface())
}