Refactor AuthService login logic

Extracted complex logic from `AuthService.login` into private helper methods (`_validateAndNormalizeLoginInputs`, `_checkAccessControl`, `_updateGlobalState`, `_updateSavedProfiles`, `_initiatePostLogin`) to improve readability and maintainability.

Moved `SimpleEventEmitter` to `js/utils/simpleEventEmitter.js` and auth constants/normalization helpers to `js/services/authUtils.js` to reduce file size and coupling.

Co-authored-by: PR0M3TH3AN <[email protected]>

js/services/authService.js

@@ -34,62 +34,15 @@ import {
   safeDecodeNpub,
   normalizeHexPubkey,
 } from "../utils/nostrHelpers.js";
-
-class SimpleEventEmitter {
-  constructor(logger = null) {
-    this.logger = typeof logger === "function" ? logger : null;
-    this.listeners = new Map();
-  }
-
-  on(eventName, handler) {
-    if (typeof handler !== "function") {
-      return () => {};
-    }
-    if (!this.listeners.has(eventName)) {
-      this.listeners.set(eventName, new Set());
-    }
-    const handlers = this.listeners.get(eventName);
-    handlers.add(handler);
-    return () => {
-      handlers.delete(handler);
-      if (!handlers.size) {
-        this.listeners.delete(eventName);
-      }
-    };
-  }
-
-  emit(eventName, detail) {
-    const handlers = this.listeners.get(eventName);
-    if (!handlers || !handlers.size) {
-      return;
-    }
-
-    for (const handler of Array.from(handlers)) {
-      try {
-        handler(detail);
-      } catch (error) {
-        if (this.logger) {
-          this.logger(`AuthService listener for "${eventName}" threw`, error);
-        }
-      }
-    }
-  }
-}
-
-
-const FALLBACK_PROFILE = {
-  name: "Unknown",
-  picture: "assets/svg/default-profile.svg",
-  about: "",
-  website: "",
-  banner: "",
-  lud16: "",
-  lud06: "",
-};
-
-const FAST_PROFILE_RELAY_LIMIT = 3;
-const FAST_PROFILE_TIMEOUT_MS = 2500;
-const BACKGROUND_PROFILE_TIMEOUT_MS = 6000;
+import { SimpleEventEmitter } from "../utils/simpleEventEmitter.js";
+import {
+  FALLBACK_PROFILE,
+  FAST_PROFILE_RELAY_LIMIT,
+  FAST_PROFILE_TIMEOUT_MS,
+  BACKGROUND_PROFILE_TIMEOUT_MS,
+  normalizeProviderId,
+  normalizeAuthType,
+} from "./authUtils.js";
 
 export default class AuthService {
   constructor({
@@ -128,7 +81,7 @@ export default class AuthService {
 
     if (typeof getAuthProvider === "function") {
       this.resolveAuthProvider = (providerId) => {
-        const normalizedId = this.normalizeProviderId(providerId);
+        const normalizedId = normalizeProviderId(providerId);
         const provider = getAuthProvider(normalizedId);
         if (!provider || typeof provider.login !== "function") {
           const error = new Error(`Unknown auth provider: ${normalizedId}`);
@@ -139,7 +92,7 @@ export default class AuthService {
       };
     } else {
       this.resolveAuthProvider = (providerId) => {
-        const normalizedId = this.normalizeProviderId(providerId);
+        const normalizedId = normalizeProviderId(providerId);
         const registry = this.authProviders || defaultAuthProviders;
         const provider =
           registry && typeof registry === "object"
@@ -155,45 +108,6 @@ export default class AuthService {
     }
   }
 
-  normalizeProviderId(providerId) {
-    return typeof providerId === "string" && providerId.trim()
-      ? providerId.trim()
-      : "nip07";
-  }
-
-  normalizeAuthType(authTypeCandidate, providerId, providerResult) {
-    const candidates = [];
-
-    if (typeof authTypeCandidate === "string") {
-      candidates.push(authTypeCandidate);
-    }
-
-    if (providerResult && typeof providerResult === "object") {
-      const resultAuthType = providerResult.authType;
-      if (typeof resultAuthType === "string") {
-        candidates.push(resultAuthType);
-      }
-
-      const resultProviderId = providerResult.providerId;
-      if (typeof resultProviderId === "string") {
-        candidates.push(resultProviderId);
-      }
-    }
-
-    if (typeof providerId === "string") {
-      candidates.push(providerId);
-    }
-
-    for (const candidate of candidates) {
-      const trimmed = candidate.trim();
-      if (trimmed) {
-        return trimmed;
-      }
-    }
-
-    return "nip07";
-  }
-
   log(...args) {
     try {
       this.logger(...args);
@@ -293,7 +207,7 @@ export default class AuthService {
       ...providerOptions
     } = normalizedOptions;
 
-    const providerId = this.normalizeProviderId(requestedProviderId);
+    const providerId = normalizeProviderId(requestedProviderId);
     const provider = this.resolveAuthProvider(providerId);
     const providerResult = await provider.login({
       nostrClient: this.nostrClient,
@@ -315,7 +229,7 @@ export default class AuthService {
       providerResult && typeof providerResult === "object"
         ? providerResult.authType
         : null;
-    const authType = this.normalizeAuthType(
+    const authType = normalizeAuthType(
       authTypeCandidate,
       providerId,
       providerResult,
@@ -405,11 +319,62 @@ export default class AuthService {
   }
 
   async login(pubkey, options = {}) {
+    const {
+      normalizedOptions,
+      providerId,
+      authType,
+      signer,
+      providerResult,
+      nextPubkey,
+      normalizedPubkey,
+      trimmedPubkey,
+      previousPubkey,
+      persistActive,
+    } = this._validateAndNormalizeLoginInputs(pubkey, options);
+
+    const { candidateNpub } = this._checkAccessControl(
+      nextPubkey,
+      trimmedPubkey,
+    );
+
+    const identityChanged = previousPubkey !== nextPubkey;
+
+    this._updateGlobalState(
+      normalizedPubkey,
+      nextPubkey,
+      trimmedPubkey,
+      candidateNpub,
+    );
+
+    const { savedProfilesMutated, entryAuthType } = this._updateSavedProfiles({
+      normalizedPubkey,
+      nextPubkey,
+      candidateNpub,
+      authType,
+      providerId,
+      providerResult,
+      persistActive,
+    });
+
+    return this._initiatePostLogin({
+      activeLoginPubkey: getPubkey(),
+      previousPubkey,
+      identityChanged,
+      savedProfiles: this.cloneSavedProfiles(),
+      activeProfilePubkey: getActiveProfilePubkey(),
+      providerId,
+      entryAuthType,
+      signer,
+      providerResult,
+    });
+  }
+
+  _validateAndNormalizeLoginInputs(pubkey, options) {
     const normalizedOptions =
       options && typeof options === "object" ? { ...options } : {};
     const persistActive =
       normalizedOptions.persistActive === false ? false : true;
-    const providerId = this.normalizeProviderId(normalizedOptions.providerId);
+    const providerId = normalizeProviderId(normalizedOptions.providerId);
     const providerResult = Object.prototype.hasOwnProperty.call(
       normalizedOptions,
       "providerResult",
@@ -420,28 +385,46 @@ export default class AuthService {
       typeof normalizedOptions.authType === "string"
         ? normalizedOptions.authType
         : null;
-    const authType = this.normalizeAuthType(
+    const authType = normalizeAuthType(
       authTypeCandidate,
       providerId,
       providerResult,
     );
-    const signer = Object.prototype.hasOwnProperty.call(normalizedOptions, "signer")
+    const signer = Object.prototype.hasOwnProperty.call(
+      normalizedOptions,
+      "signer",
+    )
       ? normalizedOptions.signer ?? null
       : null;
 
     const previousPubkey = this.normalizeHexPubkey(getPubkey()) || getPubkey();
-    const normalized = this.normalizeHexPubkey(pubkey);
-    const trimmed = typeof pubkey === "string" ? pubkey.trim() : "";
-    const nextPubkey = normalized || trimmed || null;
+    const normalizedPubkey = this.normalizeHexPubkey(pubkey);
+    const trimmedPubkey = typeof pubkey === "string" ? pubkey.trim() : "";
+    const nextPubkey = normalizedPubkey || trimmedPubkey || null;
+
     if (!nextPubkey) {
       throw new Error("A valid pubkey is required for login.");
     }
 
-    const identityChanged = previousPubkey !== nextPubkey;
+    return {
+      normalizedOptions,
+      providerId,
+      authType,
+      signer,
+      providerResult,
+      nextPubkey,
+      normalizedPubkey,
+      trimmedPubkey,
+      previousPubkey,
+      persistActive,
+    };
+  }
 
+  _checkAccessControl(nextPubkey, trimmedPubkey) {
     const control = this.accessControl;
     const candidateNpub = this.safeEncodeNpub(nextPubkey) || null;
     let lockdownActive = false;
+
     if (control && typeof control.isLockdownActive === "function") {
       try {
         lockdownActive = control.isLockdownActive();
@@ -454,7 +437,10 @@ export default class AuthService {
     if (lockdownActive) {
       let isAdminCandidate = false;
       const adminCheckValue =
-        candidateNpub || (typeof trimmed === "string" && trimmed ? trimmed : null);
+        candidateNpub ||
+        (typeof trimmedPubkey === "string" && trimmedPubkey
+          ? trimmedPubkey
+          : null);
       if (adminCheckValue && typeof control?.isAdminEditor === "function") {
         try {
           isAdminCandidate = !!control.isAdminEditor(adminCheckValue);
@@ -503,73 +489,101 @@ export default class AuthService {
       }
     }
 
-    if (normalized) {
-      setPubkey(normalized);
+    return { candidateNpub };
+  }
+
+  _updateGlobalState(
+    normalizedPubkey,
+    nextPubkey,
+    trimmedPubkey,
+    candidateNpub,
+  ) {
+    if (normalizedPubkey) {
+      setPubkey(normalizedPubkey);
       if (this.nostrClient && typeof this.nostrClient === "object") {
-        this.nostrClient.pubkey = normalized;
+        this.nostrClient.pubkey = normalizedPubkey;
       }
-      profileCache.setActiveProfile(normalized);
+      profileCache.setActiveProfile(normalizedPubkey);
     } else {
       setPubkey(nextPubkey);
       if (this.nostrClient && typeof this.nostrClient === "object") {
-        this.nostrClient.pubkey = trimmed ? trimmed.toLowerCase() : "";
+        this.nostrClient.pubkey = trimmedPubkey
+          ? trimmedPubkey.toLowerCase()
+          : "";
       }
-      profileCache.setActiveProfile(trimmed ? trimmed.toLowerCase() : null);
+      profileCache.setActiveProfile(
+        trimmedPubkey ? trimmedPubkey.toLowerCase() : null,
+      );
     }
 
-    const npub = candidateNpub;
-    setCurrentUserNpub(npub);
+    setCurrentUserNpub(candidateNpub);
+  }
 
+  _updateSavedProfiles({
+    normalizedPubkey,
+    nextPubkey,
+    candidateNpub,
+    authType,
+    providerId,
+    providerResult,
+    persistActive,
+  }) {
     let savedProfilesMutated = false;
-    const entryAuthType = this.normalizeAuthType(
+    const entryAuthType = normalizeAuthType(
       authType,
       providerId,
       providerResult,
     );
 
-    const entryProviderId = this.normalizeProviderId(providerId) || entryAuthType;
+    const entryProviderId =
+      normalizeProviderId(providerId) || entryAuthType;
 
-    mutateSavedProfiles((profiles) => {
-      const draft = Array.isArray(profiles) ? profiles.slice() : [];
-      const existingIndex = draft.findIndex((entry) => {
-        const normalizedEntry = this.normalizeHexPubkey(entry?.pubkey);
-        return normalizedEntry && normalizedEntry === normalized;
-      });
+    mutateSavedProfiles(
+      (profiles) => {
+        const draft = Array.isArray(profiles) ? profiles.slice() : [];
+        const existingIndex = draft.findIndex((entry) => {
+          const normalizedEntry = this.normalizeHexPubkey(entry?.pubkey);
+          return normalizedEntry && normalizedEntry === normalizedPubkey;
+        });
 
-      const cacheEntry = this.getProfileCacheEntry(normalized || nextPubkey);
-      const cachedProfile = cacheEntry?.profile || {};
+        const cacheEntry = this.getProfileCacheEntry(
+          normalizedPubkey || nextPubkey,
+        );
+        const cachedProfile = cacheEntry?.profile || {};
 
-      const nextEntry = {
-        pubkey: normalized || nextPubkey,
-        npub: npub || (cachedProfile.npub ?? null),
-        name: cachedProfile.name || draft[existingIndex]?.name || "",
-        picture: cachedProfile.picture || draft[existingIndex]?.picture || "",
-        authType: entryAuthType,
-        providerId: entryProviderId,
-      };
+        const nextEntry = {
+          pubkey: normalizedPubkey || nextPubkey,
+          npub: candidateNpub || (cachedProfile.npub ?? null),
+          name: cachedProfile.name || draft[existingIndex]?.name || "",
+          picture: cachedProfile.picture || draft[existingIndex]?.picture || "",
+          authType: entryAuthType,
+          providerId: entryProviderId,
+        };
 
-      if (existingIndex >= 0) {
-        const currentEntry = draft[existingIndex] || {};
-        const changed =
-          currentEntry.npub !== nextEntry.npub ||
-          currentEntry.name !== nextEntry.name ||
-          currentEntry.picture !== nextEntry.picture ||
-          currentEntry.authType !== nextEntry.authType ||
-          currentEntry.providerId !== nextEntry.providerId;
-        if (changed) {
-          draft[existingIndex] = nextEntry;
+        if (existingIndex >= 0) {
+          const currentEntry = draft[existingIndex] || {};
+          const changed =
+            currentEntry.npub !== nextEntry.npub ||
+            currentEntry.name !== nextEntry.name ||
+            currentEntry.picture !== nextEntry.picture ||
+            currentEntry.authType !== nextEntry.authType ||
+            currentEntry.providerId !== nextEntry.providerId;
+          if (changed) {
+            draft[existingIndex] = nextEntry;
+            savedProfilesMutated = true;
+          }
+        } else {
+          draft.push(nextEntry);
           savedProfilesMutated = true;
         }
-      } else {
-        draft.push(nextEntry);
-        savedProfilesMutated = true;
-      }
 
-      return draft;
-    }, { persist: false, persistActive: false });
+        return draft;
+      },
+      { persist: false, persistActive: false },
+    );
 
     if (persistActive) {
-      setActiveProfilePubkey(normalized || nextPubkey, { persist: true });
+      setActiveProfilePubkey(normalizedPubkey || nextPubkey, { persist: true });
     }
 
     if (!persistActive && savedProfilesMutated) {
@@ -582,7 +596,20 @@ export default class AuthService {
       this.emitProfileList("login");
     }
 
-    const activeLoginPubkey = getPubkey();
+    return { savedProfilesMutated, entryAuthType };
+  }
+
+  _initiatePostLogin({
+    activeLoginPubkey,
+    previousPubkey,
+    identityChanged,
+    savedProfiles,
+    activeProfilePubkey,
+    providerId,
+    entryAuthType,
+    signer,
+    providerResult,
+  }) {
     const normalizedLoginPubkey =
       this.normalizeHexPubkey(activeLoginPubkey) || activeLoginPubkey || null;
 
@@ -591,8 +618,8 @@ export default class AuthService {
       npub: getCurrentUserNpub(),
       previousPubkey: previousPubkey || null,
       identityChanged,
-      savedProfiles: this.cloneSavedProfiles(),
-      activeProfilePubkey: getActiveProfilePubkey(),
+      savedProfiles,
+      activeProfilePubkey,
       providerId,
       authType: entryAuthType,
       signer,
@@ -607,7 +634,11 @@ export default class AuthService {
       postLoginError: null,
     };
 
-    const { detail: postLoginDetail, completionPromise, relaysReadyPromise } = this.applyPostLoginState({
+    const {
+      detail: postLoginDetail,
+      completionPromise,
+      relaysReadyPromise,
+    } = this.applyPostLoginState({
       deferBlocks: true,
     });
     detail.postLogin = postLoginDetail;
@@ -621,7 +652,10 @@ export default class AuthService {
         try {
           this.emitProfileList("post-login");
         } catch (error) {
-          this.log("[AuthService] Failed to emit profile list after login", error);
+          this.log(
+            "[AuthService] Failed to emit profile list after login",
+            error,
+          );
         }
 
         this.emit("auth:post-login", {
@@ -916,7 +950,7 @@ export default class AuthService {
 
     const normalizedOptions =
       options && typeof options === "object" ? { ...options } : {};
-    const providerId = this.normalizeProviderId(normalizedOptions.providerId);
+    const providerId = normalizeProviderId(normalizedOptions.providerId);
 
     const normalizedActive = this.normalizeHexPubkey(getActiveProfilePubkey());
     if (normalizedActive && normalizedActive === normalizedTarget) {

js/services/authUtils.js

@@ -0,0 +1,53 @@
+
+export const FALLBACK_PROFILE = {
+  name: "Unknown",
+  picture: "assets/svg/default-profile.svg",
+  about: "",
+  website: "",
+  banner: "",
+  lud16: "",
+  lud06: "",
+};
+
+export const FAST_PROFILE_RELAY_LIMIT = 3;
+export const FAST_PROFILE_TIMEOUT_MS = 2500;
+export const BACKGROUND_PROFILE_TIMEOUT_MS = 6000;
+
+export function normalizeProviderId(providerId) {
+  return typeof providerId === "string" && providerId.trim()
+    ? providerId.trim()
+    : "nip07";
+}
+
+export function normalizeAuthType(authTypeCandidate, providerId, providerResult) {
+  const candidates = [];
+
+  if (typeof authTypeCandidate === "string") {
+    candidates.push(authTypeCandidate);
+  }
+
+  if (providerResult && typeof providerResult === "object") {
+    const resultAuthType = providerResult.authType;
+    if (typeof resultAuthType === "string") {
+      candidates.push(resultAuthType);
+    }
+
+    const resultProviderId = providerResult.providerId;
+    if (typeof resultProviderId === "string") {
+      candidates.push(resultProviderId);
+    }
+  }
+
+  if (typeof providerId === "string") {
+    candidates.push(providerId);
+  }
+
+  for (const candidate of candidates) {
+    const trimmed = candidate.trim();
+    if (trimmed) {
+      return trimmed;
+    }
+  }
+
+  return "nip07";
+}

js/utils/simpleEventEmitter.js

@@ -0,0 +1,40 @@
+export class SimpleEventEmitter {
+  constructor(logger = null) {
+    this.logger = typeof logger === "function" ? logger : null;
+    this.listeners = new Map();
+  }
+
+  on(eventName, handler) {
+    if (typeof handler !== "function") {
+      return () => {};
+    }
+    if (!this.listeners.has(eventName)) {
+      this.listeners.set(eventName, new Set());
+    }
+    const handlers = this.listeners.get(eventName);
+    handlers.add(handler);
+    return () => {
+      handlers.delete(handler);
+      if (!handlers.size) {
+        this.listeners.delete(eventName);
+      }
+    };
+  }
+
+  emit(eventName, detail) {
+    const handlers = this.listeners.get(eventName);
+    if (!handlers || !handlers.size) {
+      return;
+    }
+
+    for (const handler of Array.from(handlers)) {
+      try {
+        handler(detail);
+      } catch (error) {
+        if (this.logger) {
+          this.logger(`Listener for "${eventName}" threw`, error);
+        }
+      }
+    }
+  }
+}