@bhayward93/web3modal-angular
Version:
Web3Modal implementation for Angular
184 lines • 25.2 kB
JavaScript
import * as list from '../providers';
import { CACHED_PROVIDER_KEY, CONNECT_EVENT, ERROR_EVENT, INJECTED_PROVIDER_ID } from '../constants';
import { filterMatches, findMatchingRequiredOptions, getInjectedProvider, getLocal, getProviderDescription, getProviderInfoById, isMobile, removeLocal, setLocal, } from '../helpers';
import { EventController } from './events';
export class ProviderController {
constructor(opts) {
this.cachedProvider = '';
this.shouldCacheProvider = false;
this.disableInjectedProvider = false;
this.eventController = new EventController();
this.injectedProvider = null;
this.providers = [];
this.network = '';
this.getUserOptions = () => {
const mobile = isMobile();
const defaultProviderList = this.providers.map(({ id }) => id);
const displayInjected = !!this.injectedProvider && !this.disableInjectedProvider;
const onlyInjected = displayInjected && mobile;
const providerList = [];
if (onlyInjected) {
providerList.push(INJECTED_PROVIDER_ID);
}
else {
if (displayInjected) {
providerList.push(INJECTED_PROVIDER_ID);
}
defaultProviderList.forEach((id) => {
if (id !== INJECTED_PROVIDER_ID) {
const result = this.shouldDisplayProvider(id);
if (result) {
providerList.push(id);
}
}
});
}
const userOptions = [];
providerList.forEach((id) => {
let provider = this.getProvider(id);
if (typeof provider !== 'undefined') {
let { id, name, logo, connector } = provider;
// replace logo with configuration set logo, use default as fallback.
logo = this.providerOptions[id]?.logoUrl ?? logo;
userOptions.push({
name,
logo,
description: getProviderDescription(provider),
onClick: () => this.connectTo(id, connector),
});
}
});
return userOptions;
};
this.connectTo = async (id, connector) => {
try {
const providerPackage = this.getProviderOption(id, 'package');
const providerOptions = this.getProviderOption(id, 'options');
const opts = { network: this.network || undefined, ...providerOptions };
const provider = await connector(providerPackage, opts);
this.eventController.trigger(CONNECT_EVENT, provider);
if (this.shouldCacheProvider && this.cachedProvider !== id) {
this.setCachedProvider(id);
}
}
catch (error) {
this.eventController.trigger(ERROR_EVENT);
}
};
this.cachedProvider = getLocal(CACHED_PROVIDER_KEY) || '';
this.disableInjectedProvider = opts.disableInjectedProvider;
this.shouldCacheProvider = opts.cacheProvider;
this.providerOptions = opts.providerOptions;
this.network = opts.network;
this.injectedProvider = getInjectedProvider();
this.providers = Object.keys(list.connectors).map((id) => {
let providerInfo;
if (id === INJECTED_PROVIDER_ID) {
providerInfo = this.injectedProvider || list.providers.FALLBACK;
}
else {
providerInfo = getProviderInfoById(id);
}
// parse custom display options
if (this.providerOptions[id]) {
const options = this.providerOptions[id];
if (typeof options.display !== 'undefined') {
providerInfo = {
...providerInfo,
...this.providerOptions[id].display,
};
}
}
return {
...providerInfo,
connector: list.connectors[id],
package: providerInfo.package,
};
});
// parse custom providers
Object.keys(this.providerOptions)
.filter(key => key.startsWith('custom-'))
.map(id => {
if (id && this.providerOptions[id]) {
const options = this.providerOptions[id];
if (typeof options.display !== 'undefined' &&
typeof options.connector !== 'undefined') {
this.providers.push({
...list.providers.FALLBACK,
id,
...options.display,
connector: options.connector,
});
}
}
});
}
shouldDisplayProvider(id) {
const provider = this.getProvider(id);
if (typeof provider !== 'undefined') {
const providerPackageOptions = this.providerOptions[id];
if (providerPackageOptions) {
const isProvided = !!providerPackageOptions.package;
if (isProvided) {
const requiredOptions = provider.package
? provider.package.required
: undefined;
if (requiredOptions && requiredOptions.length) {
const providedOptions = providerPackageOptions.options;
if (providedOptions && Object.keys(providedOptions).length) {
const matches = findMatchingRequiredOptions(requiredOptions, providedOptions);
if (requiredOptions.length === matches.length) {
return true;
}
}
}
else {
return true;
}
}
}
}
return false;
}
getProvider(id) {
return filterMatches(this.providers, x => x.id === id, undefined);
}
getProviderOption(id, key) {
return this.providerOptions &&
this.providerOptions[id] &&
this.providerOptions[id][key]
? this.providerOptions[id][key]
: {};
}
clearCachedProvider() {
this.cachedProvider = '';
removeLocal(CACHED_PROVIDER_KEY);
}
setCachedProvider(id) {
this.cachedProvider = id;
setLocal(CACHED_PROVIDER_KEY, id);
}
async connectToCachedProvider() {
const provider = this.getProvider(this.cachedProvider);
if (typeof provider !== 'undefined') {
await this.connectTo(provider.id, provider.connector);
}
}
on(event, callback) {
this.eventController.on({
event,
callback,
});
return () => this.eventController.off({
event,
callback,
});
}
off(event, callback) {
this.eventController.off({
event,
callback,
});
}
}
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* as list from '../providers';\nimport { CACHED_PROVIDER_KEY, CONNECT_EVENT, ERROR_EVENT, INJECTED_PROVIDER_ID } from '../constants';\nimport {\n  filterMatches,\n  findMatchingRequiredOptions,\n  getInjectedProvider,\n  getLocal,\n  getProviderDescription,\n  getProviderInfoById,\n  IProviderControllerOptions,\n  IProviderDisplayWithConnector,\n  IProviderInfo,\n  IProviderOptions,\n  IProviderUserOptions,\n  isMobile,\n  removeLocal,\n  setLocal,\n} from '../helpers';\nimport { EventController } from './events';\n\nexport class ProviderController {\n  public cachedProvider: string = '';\n  public shouldCacheProvider: boolean = false;\n  public disableInjectedProvider: boolean = false;\n\n  private eventController: EventController = new EventController();\n  private injectedProvider: IProviderInfo | null = null;\n  private providers: IProviderDisplayWithConnector[] = [];\n  private providerOptions: IProviderOptions;\n  private network: string = '';\n\n  constructor(opts: IProviderControllerOptions) {\n    this.cachedProvider = getLocal(CACHED_PROVIDER_KEY) || '';\n\n    this.disableInjectedProvider = opts.disableInjectedProvider;\n    this.shouldCacheProvider = opts.cacheProvider;\n    this.providerOptions = opts.providerOptions;\n    this.network = opts.network;\n\n    this.injectedProvider = getInjectedProvider();\n\n    this.providers = Object.keys(list.connectors).map((id: string) => {\n      let providerInfo: IProviderInfo;\n      if (id === INJECTED_PROVIDER_ID) {\n        providerInfo = this.injectedProvider || list.providers.FALLBACK;\n      } else {\n        providerInfo = getProviderInfoById(id);\n      }\n      // parse custom display options\n      if (this.providerOptions[id]) {\n        const options = this.providerOptions[id];\n        if (typeof options.display !== 'undefined') {\n          providerInfo = {\n            ...providerInfo,\n            ...this.providerOptions[id].display,\n          };\n        }\n      }\n      return {\n        ...providerInfo,\n        connector: list.connectors[id],\n        package: providerInfo.package,\n      };\n    });\n    // parse custom providers\n    Object.keys(this.providerOptions)\n      .filter(key => key.startsWith('custom-'))\n      .map(id => {\n        if (id && this.providerOptions[id]) {\n          const options = this.providerOptions[id];\n          if (\n            typeof options.display !== 'undefined' &&\n            typeof options.connector !== 'undefined'\n          ) {\n            this.providers.push({\n              ...list.providers.FALLBACK,\n              id,\n              ...options.display,\n              connector: options.connector,\n            });\n          }\n        }\n      });\n  }\n\n  public shouldDisplayProvider(id: string) {\n    const provider = this.getProvider(id);\n    if (typeof provider !== 'undefined') {\n      const providerPackageOptions = this.providerOptions[id];\n      if (providerPackageOptions) {\n        const isProvided = !!providerPackageOptions.package;\n        if (isProvided) {\n          const requiredOptions = provider.package\n            ? provider.package.required\n            : undefined;\n          if (requiredOptions && requiredOptions.length) {\n            const providedOptions = providerPackageOptions.options;\n            if (providedOptions && Object.keys(providedOptions).length) {\n              const matches = findMatchingRequiredOptions(\n                requiredOptions,\n                providedOptions\n              );\n              if (requiredOptions.length === matches.length) {\n                return true;\n              }\n            }\n          } else {\n            return true;\n          }\n        }\n      }\n    }\n    return false;\n  }\n\n  public getUserOptions = () => {\n    const mobile = isMobile();\n    const defaultProviderList = this.providers.map(({ id }) => id);\n\n    const displayInjected =\n      !!this.injectedProvider && !this.disableInjectedProvider;\n    const onlyInjected = displayInjected && mobile;\n\n    const providerList = [];\n\n    if (onlyInjected) {\n      providerList.push(INJECTED_PROVIDER_ID);\n    } else {\n      if (displayInjected) {\n        providerList.push(INJECTED_PROVIDER_ID);\n      }\n\n      defaultProviderList.forEach((id: string) => {\n        if (id !== INJECTED_PROVIDER_ID) {\n          const result = this.shouldDisplayProvider(id);\n          if (result) {\n            providerList.push(id);\n          }\n        }\n      });\n    }\n\n    const userOptions: IProviderUserOptions[] = [];\n\n    providerList.forEach((id: string) => {\n      let provider = this.getProvider(id);\n      if (typeof provider !== 'undefined') {\n        let { id, name, logo, connector } = provider;\n\n        // replace logo with configuration set logo, use default as fallback.\n        logo = this.providerOptions[id]?.logoUrl ?? logo;\n        userOptions.push({\n          name,\n          logo,\n          description: getProviderDescription(provider),\n          onClick: () => this.connectTo(id, connector),\n        });\n      }\n    });\n\n    return userOptions;\n  };\n\n  public getProvider(id: string) {\n    return filterMatches<IProviderDisplayWithConnector>(\n      this.providers,\n      x => x.id === id,\n      undefined\n    );\n  }\n\n  public getProviderOption(id: string, key: string) {\n    return this.providerOptions &&\n      this.providerOptions[id] &&\n      this.providerOptions[id][key]\n      ? this.providerOptions[id][key]\n      : {};\n  }\n\n  public clearCachedProvider() {\n    this.cachedProvider = '';\n    removeLocal(CACHED_PROVIDER_KEY);\n  }\n\n  public setCachedProvider(id: string) {\n    this.cachedProvider = id;\n    setLocal(CACHED_PROVIDER_KEY, id);\n  }\n\n  public connectTo = async (\n    id: string,\n    connector: (providerPackage: any, opts: any) => Promise<any>\n  ) => {\n    try {\n      const providerPackage = this.getProviderOption(id, 'package');\n      const providerOptions = this.getProviderOption(id, 'options');\n      const opts = { network: this.network || undefined, ...providerOptions };\n      const provider = await connector(providerPackage, opts);\n      this.eventController.trigger(CONNECT_EVENT, provider);\n      if (this.shouldCacheProvider && this.cachedProvider !== id) {\n        this.setCachedProvider(id);\n      }\n    } catch (error) {\n      this.eventController.trigger(ERROR_EVENT);\n    }\n  };\n\n  public async connectToCachedProvider() {\n    const provider = this.getProvider(this.cachedProvider);\n    if (typeof provider !== 'undefined') {\n      await this.connectTo(provider.id, provider.connector);\n    }\n  }\n\n  public on(event: string, callback: (result: any) => void): () => void {\n    this.eventController.on({\n      event,\n      callback,\n    });\n\n    return () =>\n      this.eventController.off({\n        event,\n        callback,\n      });\n  }\n\n  public off(event: string, callback?: (result: any) => void): void {\n    this.eventController.off({\n      event,\n      callback,\n    });\n  }\n}\n"]}