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metamask-extension/app/scripts/controllers/alert.js

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import { ObservableStore } from '@metamask/obs-store';
import {
TOGGLEABLE_ALERT_TYPES,
WEB3_SHIM_USAGE_ALERT_STATES,
} from '../../../shared/constants/alerts';
/**
* @typedef {Object} AlertControllerInitState
* @property {Object} alertEnabledness - A map of alerts IDs to booleans, where
* `true` indicates that the alert is enabled and shown, and `false` the opposite.
* @property {Object} unconnectedAccountAlertShownOrigins - A map of origin
* strings to booleans indicating whether the "switch to connected" alert has
* been shown (`true`) or otherwise (`false`).
*/
/**
* @typedef {Object} AlertControllerOptions
* @property {AlertControllerInitState} initState - The initial controller state
*/
const defaultState = {
alertEnabledness: TOGGLEABLE_ALERT_TYPES.reduce(
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(alertEnabledness, alertType) => {
alertEnabledness[alertType] = true;
return alertEnabledness;
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},
{},
),
unconnectedAccountAlertShownOrigins: {},
web3ShimUsageOrigins: {},
};
/**
* Controller responsible for maintaining alert-related state.
*/
export default class AlertController {
/**
* @constructor
* @param {AlertControllerOptions} [opts] - Controller configuration parameters
*/
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constructor(opts = {}) {
const { initState = {}, preferencesStore } = opts;
const state = {
...defaultState,
alertEnabledness: {
...defaultState.alertEnabledness,
...initState.alertEnabledness,
},
};
this.store = new ObservableStore(state);
this.selectedAddress = preferencesStore.getState().selectedAddress;
preferencesStore.subscribe(({ selectedAddress }) => {
const currentState = this.store.getState();
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if (
currentState.unconnectedAccountAlertShownOrigins &&
this.selectedAddress !== selectedAddress
) {
this.selectedAddress = selectedAddress;
this.store.updateState({ unconnectedAccountAlertShownOrigins: {} });
}
});
}
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setAlertEnabledness(alertId, enabledness) {
let { alertEnabledness } = this.store.getState();
alertEnabledness = { ...alertEnabledness };
alertEnabledness[alertId] = enabledness;
this.store.updateState({ alertEnabledness });
}
/**
* Sets the "switch to connected" alert as shown for the given origin
* @param {string} origin - The origin the alert has been shown for
*/
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setUnconnectedAccountAlertShown(origin) {
let { unconnectedAccountAlertShownOrigins } = this.store.getState();
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unconnectedAccountAlertShownOrigins = {
...unconnectedAccountAlertShownOrigins,
};
unconnectedAccountAlertShownOrigins[origin] = true;
this.store.updateState({ unconnectedAccountAlertShownOrigins });
}
/**
* Gets the web3 shim usage state for the given origin.
*
* @param {string} origin - The origin to get the web3 shim usage state for.
* @returns {undefined | 1 | 2} The web3 shim usage state for the given
* origin, or undefined.
*/
getWeb3ShimUsageState(origin) {
return this.store.getState().web3ShimUsageOrigins[origin];
}
/**
* Sets the web3 shim usage state for the given origin to RECORDED.
*
* @param {string} origin - The origin the that used the web3 shim.
*/
setWeb3ShimUsageRecorded(origin) {
this._setWeb3ShimUsageState(origin, WEB3_SHIM_USAGE_ALERT_STATES.RECORDED);
}
/**
* Sets the web3 shim usage state for the given origin to DISMISSED.
*
* @param {string} origin - The origin that the web3 shim notification was
* dismissed for.
*/
setWeb3ShimUsageAlertDismissed(origin) {
this._setWeb3ShimUsageState(origin, WEB3_SHIM_USAGE_ALERT_STATES.DISMISSED);
}
/**
* @private
* @param {string} origin - The origin to set the state for.
* @param {number} value - The state value to set.
*/
_setWeb3ShimUsageState(origin, value) {
let { web3ShimUsageOrigins } = this.store.getState();
web3ShimUsageOrigins = {
...web3ShimUsageOrigins,
};
web3ShimUsageOrigins[origin] = value;
this.store.updateState({ web3ShimUsageOrigins });
}
}