From 13fbef4550e0e95024df9f1cc77764b8c734ca3f Mon Sep 17 00:00:00 2001 From: Henry Jameson Date: Fri, 14 Dec 2018 17:33:48 +0300 Subject: [PATCH] slightly changed the code to have less mutations, added comments --- .../user_card_content/user_card_content.js | 71 +++++++++++-------- 1 file changed, 41 insertions(+), 30 deletions(-) diff --git a/src/components/user_card_content/user_card_content.js b/src/components/user_card_content/user_card_content.js index 8c6de8ec..206dba88 100644 --- a/src/components/user_card_content/user_card_content.js +++ b/src/components/user_card_content/user_card_content.js @@ -90,43 +90,54 @@ export default { store.state.api.backendInteractor.followUser(this.user.id) .then((followedUser) => store.commit('addNewUsers', [followedUser])) .then(() => { + // For locked users we just mark it that we sent the follow request + if (this.user.locked) { + this.followRequestInProgress = false + this.followRequestSent = true + return + } + if (this.user.following) { + // If we get result immediately, just stop. this.followRequestInProgress = false return } - if (!this.user.locked) { - let attemptsLeft = 3 - const fetchUser = () => new Promise((resolve, reject) => { - setTimeout(() => { - store.state.api.backendInteractor.fetchUser({ id: this.user.id }) - .then((user) => store.commit('addNewUsers', [user])) - .then(() => resolve(this.user.following)) - .catch((e) => reject(e)) - }, 500) - }).then((confirmed) => { - if (!confirmed && attemptsLeft > 0) { - attemptsLeft-- - return fetchUser() - } else if (confirmed) { - return true + + // But usually we don't get result immediately, so we ask server + // for updated user profile to confirm if we are following them + // Sometimes it takes several tries. Sometimes we end up not following + // user anyway, probably because they locked themselves and we + // don't know that yet. + // Recursive Promise, it will call itself up to 3 times. + const fetchUser = (attempt) => new Promise((resolve, reject) => { + setTimeout(() => { + store.state.api.backendInteractor.fetchUser({ id: this.user.id }) + .then((user) => store.commit('addNewUsers', [user])) + .then(() => resolve([this.user.following, attempt])) + .catch((e) => reject(e)) + }, 500) + }).then(([following, attempt]) => { + if (!following && attempt <= 3) { + // If we BE reports that we still not following that user - retry, + // increment attempts by one + return fetchUser(++attempt) + } else { + // If we run out of attempts, just return whatever status is. + return following + } + }) + + return fetchUser(1) + .then((following) => { + if (following) { + // We confirmed and everything its good. + this.followRequestInProgress = false } else { - return false + // If after all the tries, just treat it as if user is locked + this.followRequestInProgress = false + this.followRequestSent = true } }) - - return fetchUser() - .then((successfulConfirmation) => { - if (successfulConfirmation) { - this.followRequestInProgress = false - } else { - this.followRequestInProgress = false - this.followRequestSent = true - } - }) - } else { - this.followRequestInProgress = false - this.followRequestSent = true - } }) }, unfollowUser () {