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401 lines (364 loc) · 14.1 KB
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const EVENTS = require("events");
const DEBOUNCE = require('lodash/debounce');
exports.for = function (ctx) {
const events = new EVENTS.EventEmitter();
events.browser = ctx.browser;
events.currentContext = null;
// events.settings = {};
setImmediate(function () {
onContextMessage(null);
broadcastCurrentContext();
});
let contextChangeAcknowledged = false;
events.contextChangeAcknowledged = function () {
contextChangeAcknowledged = true;
}
function onContextMessage (context) {
if (
context !== events.currentContext &&
(
!events.currentContext ||
!context ||
context.pageUid !== events.currentContext.pageUid
)
) {
events.currentContext = context;
// events.settings = {};
contextChangeAcknowledged = false;
}
if (!contextChangeAcknowledged) {
events.emit("changed.context", events.currentContext);
}
}
events.handleBroadcastMessage = function (message) {
try {
if (
message.context &&
(
(
ctx.getOwnTabId &&
message.context.tabId === ctx.getOwnTabId()
) ||
(
ctx.browser &&
ctx.browser.devtools &&
ctx.browser.devtools.inspectedWindow &&
message.context.tabId === ctx.browser.devtools.inspectedWindow.tabId
) ||
(
ctx.name &&
message.to === ctx.name
)
)
) {
if (
message.to === "message-listener" ||
(ctx.name && message.to === ctx.name)
) {
if (
message.event === "currentContext" &&
typeof message.context !== "undefined"
) {
onContextMessage(message.context);
}
events.emit("message", message);
} else
if (message.to === "protocol") {
if (
ctx.handlers &&
ctx.handlers[message.message.receiver]
) {
message.message.meta = JSON.parse(message.message.meta);
message.message.data = JSON.parse(message.message.data);
ctx.handlers[message.message.receiver](message.message);
}
}
}
} catch (err) {
console.error(err);
}
}
ctx.browser.runtime.onMessage.addListener(events.handleBroadcastMessage);
const globalSettings = {};
const domainSettings = {};
ctx.browser.storage.onChanged.addListener(function (changes, area) {
try {
if (!events.currentContext) {
return;
}
const prefix = `hostname[${events.currentContext.hostname}].`;
for (var item of Object.keys(changes)) {
if (!/^hostname\[.+\]\..+$/.test(item)) {
globalSettings[item] = changes[item].newValue;
continue;
}
if (item.substring(0, prefix.length) === prefix) {
//console.log("[component] Updated domain settings '" + item + "':", events.settings[name]);
const name = item.substring(prefix.length);
// if (events.settings[name] !== changes[item].newValue) {
// events.settings[name] = changes[item].newValue;
domainSettings[events.currentContext.hostname] = domainSettings[events.currentContext.hostname] || {};
domainSettings[events.currentContext.hostname][name] = (changes[item].newValue || false);
delete events._getHostnameSettingsForSync._cache[events.currentContext.hostname];
events.emit("setting." + name, domainSettings[events.currentContext.hostname][name]);
events.emit("changed.setting", name, domainSettings[events.currentContext.hostname][name]);
// }
}
}
} catch (err) {
console.error(err);
}
});
const broadcastCurrentContext = DEBOUNCE(function () {
ctx.browser.runtime.sendMessage({
to: "broadcast",
event: "currentContext"
}).catch(function (err) {
if (/Receiving end does not exist/.test(err.message)) {
// Silence error as it is expected once in the beginning.
// TODO: Make establishing a connection more deterministic so we do not need to slicence any errors.
// TODO: Display error when in dev mode.
return;
}
// TODO: Only log when in dev mode.
console.error('WARNING: Error while broadcasting current context:', err.message);
});
}, 250);
// Get a setting for the current context's hostname
events.getSetting = async function (name) {
if (!events.currentContext) {
return Promise.resolve(null);
}
return events._getSettingForHostname(events.currentContext.hostname, name);
}
events._getSettingForHostname = async function (hostname, name, defaultValue) {
if (typeof defaultValue === "undefined") {
defaultValue = false;
}
if (typeof ctx.browser === "undefined") {
return Promise.resolve(null);
}
var key = "hostname[" + hostname + "]." + name;
return ctx.browser.storage.local.get(key).then(function (value) {
if (
value[key] === null ||
typeof value[key] === "undefined"
) {
return defaultValue;
}
return value[key];
}).then(function (value) {
domainSettings[hostname] = domainSettings[hostname] || {};
domainSettings[hostname][name] = value;
return value;
}).catch(function (err) {
console.error(err);
throw err;
});
}
events._getSettingForHostnameSync = function (hostname, name, defaultValue) {
if (typeof defaultValue === "undefined") {
defaultValue = false;
}
if (
!domainSettings[hostname] ||
typeof domainSettings[hostname][name] === "undefined"
) {
events._getSettingForHostname(hostname, name, defaultValue);
return defaultValue;
}
return domainSettings[hostname][name];
}
events.setSetting = async function (name, value) {
if (!events.currentContext) {
throw new Error(`Cannot set setting for name '${name}' due to no 'currentContext'!`);
}
return events._setSettingForHostname(events.currentContext.hostname, name, value);
}
events._setSettingForHostname = async function (hostname, name, value) {
if (typeof ctx.browser === "undefined") {
return Promise.resolve(null);
}
return events._getSettingForHostname(hostname, name).then(function (existingValue) {
if (value === existingValue) {
// No change
return;
}
var obj = {};
obj["hostname[" + hostname + "]." + name] = value;
domainSettings[hostname] = domainSettings[hostname] || {};
domainSettings[hostname][name] = value;
return ctx.browser.storage.local.set(obj).then(broadcastCurrentContext);
}).catch(function (err) {
console.error(err);
throw err;
});
}
events.getGlobalSetting = async function (name) {
if (typeof ctx.browser === "undefined") {
return null;
}
var defaultValue;
if (name === "reloadOnEnable") {
defaultValue = true;
}
return ctx.browser.storage.local.get(name).then(function (value) {
if (typeof value[name] === "undefined") {
if (typeof defaultValue !== "undefined") {
return defaultValue;
}
return null;
}
return value[name];
}).then(function (value) {
globalSettings[name] = value;
return value;
}).catch(function (err) {
console.error(err);
throw err;
});
}
events.setGlobalSetting = async function (name, value) {
if (typeof ctx.browser === "undefined") {
return null;
}
return events.getGlobalSetting(name).then(function (existingValue) {
if (value === existingValue) {
// No change
return;
}
var obj = {};
obj[name] = value;
globalSettings[name] = value;
return ctx.browser.storage.local.set(obj).then(broadcastCurrentContext);
}).catch(function (err) {
console.error(err);
throw err;
});
}
events.hasGrants = async function () {
if (!events.currentContext) {
return false;
}
const settings = await events._getHostnameSettingsFor(events.currentContext.hostname);
return settings.permissionGranted || false;
}
events.isConfigured = async function () {
if (!events.currentContext) {
throw new Error(`Cannot get settings due to no 'currentContext'!`);
}
const settings = await events._getHostnameSettingsFor(events.currentContext.hostname);
return settings._configured;
}
events._getHostnameSettingsFor = async function (hostname) {
const settings = {
enabled: await events._getSettingForHostname(hostname, "enabled", false),
enableUserAgentHeader: await events._getSettingForHostname(hostname, "enableUserAgentHeader", false),
enableFirePHPHeader: await events._getSettingForHostname(hostname, "enableFirePHPHeader", false),
enableChromeLoggerData: await events._getSettingForHostname(hostname, "enableChromeLoggerData", false),
permissionGranted: await events._getSettingForHostname(hostname, "permissionGranted", false),
};
settings._configured = settings.permissionGranted && (
settings.enableUserAgentHeader ||
settings.enableFirePHPHeader ||
settings.enableChromeLoggerData
);
return settings;
}
// Callable in high volume.
events._getHostnameSettingsForSync = function (hostname) {
if (!events._getHostnameSettingsForSync._cache[hostname]) {
const settings = {
enabled: events._getSettingForHostnameSync(hostname, "enabled", false),
enableUserAgentHeader: events._getSettingForHostnameSync(hostname, "enableUserAgentHeader", false),
enableFirePHPHeader: events._getSettingForHostnameSync(hostname, "enableFirePHPHeader", false),
enableChromeLoggerData: events._getSettingForHostnameSync(hostname, "enableChromeLoggerData", false),
permissionGranted: events._getSettingForHostnameSync(hostname, "permissionGranted", false)
};
settings._configured = settings.permissionGranted && (
settings.enableUserAgentHeader ||
settings.enableFirePHPHeader ||
settings.enableChromeLoggerData
);
events._getHostnameSettingsForSync._cache[hostname] = settings;
}
return events._getHostnameSettingsForSync._cache[hostname];
}
events._getHostnameSettingsForSync._cache = {};
events.isEnabled = async function () {
if (!events.currentContext) {
return false;
}
return events._isEnabledForHostname(events.currentContext.hostname);
}
events._isEnabledForHostname = async function (hostname) {
const settings = await events._getHostnameSettingsFor(hostname);
return (
settings.permissionGranted &&
settings.enabled &&
settings._configured
);
}
events.reloadBrowser = function () {
ctx.browser.runtime.sendMessage({
to: "background",
event: "reload",
context: {
tabId: ctx.browser.devtools.inspectedWindow.tabId
}
});
}
events.clearConsole = function () {
ctx.browser.runtime.sendMessage({
to: "broadcast",
event: "clear"/*,
context: {
tabId: ctx.browser.devtools.inspectedWindow.tabId
}*/
});
}
events.getCurrentContext = function () {
ctx.browser.runtime.sendMessage({
to: "background",
event: "getCurrentContext",
from: ctx.name
});
}
events.showView = function (name, args) {
if (name === "manage") {
ctx.browser.runtime.sendMessage({
to: "broadcast",
event: "manage"/*,
context: {
tabId: ctx.browser.devtools.inspectedWindow.tabId
}*/
});
} else
if (name === "editor") {
ctx.browser.runtime.sendMessage({
to: "broadcast",
event: "editor",
args: args
});
}
}
events.hideView = function (name) {
if (name === "editor") {
console.log("broadcast hide view: editor");
ctx.browser.runtime.sendMessage({
to: "broadcast",
event: "editor",
value: false
});
}
}
events.loadFile = function (file, line) {
ctx.browser.runtime.sendMessage({
to: "background",
event: "load-file",
file: file,
line: line
});
}
return events;
}