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refactor: Move the SM2 implementation to the backend

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This commit is contained in:
Alexander Polynomdivision 2018-10-17 14:40:21 +02:00
parent 6e80ed79d2
commit 7de3cedb15
2 changed files with 16 additions and 17 deletions
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0
frontend/src/algorithms/sm2/index.ts → backend/src/algorithms/sm2/index.ts
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33
backend/src/api/user.ts
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@ -8,7 +8,9 @@ import { authRoute } from "../security/token";
import { userFromSession } from "../utils/user"; import { userFromSession } from "../utils/user";
import { IUser, IUserDBModel } from "../models/user"; import { IUser, IUserDBModel } from "../models/user";
import { ISM2Metadata } from "../models/review"; import {
ISchedulingData, AnswerType, updateSchedulingData
} from "../algorithms/sm2";
import { LRequest } from "../types/express"; import { LRequest } from "../types/express";
const userRouter = express.Router(); const userRouter = express.Router();
@ -190,34 +192,31 @@ userRouter.post("/lastReview", async (req: LRequest, res) => {
return; return;
} }
// NOTE: Oh oh
// Update the user's score based on what they sent us
user.score += parseInt(req.body.delta); user.score += parseInt(req.body.delta);
// Itterate over all of the vocabulary that needs to have its
// metadata updated.
// Use our SM2 implementation to update the vocabulary and modify our
// copy of the user object, so that we can write the copied (and modified)
// user object back into the database.
Object.keys(req.body.sm2).forEach((id: string) => { Object.keys(req.body.sm2).forEach((id: string) => {
const vocabId = parseInt(id); const vocabId = parseInt(id);
const correct: boolean = req.body.sm2[id]; const correct: boolean = req.body.sm2[id];
let vocab_sm2: ISM2Metadata = Object.assign({}, let vocab_sm2: ISchedulingData = Object.assign({},
user.vocabMetadata[vocabId]); user.vocabMetadata[vocabId]);
// TODO: Tuning? const answer = correct ? AnswerType.CORRECT : AnswerType.WRONG;
// TODO: Move into another module user.vocabMetadata[vocabId] = updateSchedulingData(vocab_sm2, answer);
const perf = correct ? 3 : 1;
vocab_sm2.easiness += -0.8 + 0.28 * perf + 0.02 * Math.pow(perf, 2);
// Update the consecutive correct answers and the due date
if (correct) {
vocab_sm2.consecutiveCorrectAnswers += 1;
vocab_sm2.nextDueDate = dateInNDays(6 * Math.pow(vocab_sm2.easiness, vocab_sm2.consecutiveCorrectAnswers - 1));
} else {
vocab_sm2.consecutiveCorrectAnswers = 0;
vocab_sm2.nextDueDate = dateInNDays(1);
}
user.vocabMetadata[vocabId] = vocab_sm2;
}); });
// Update the last review // Update the last review
user.lastReview = req.body.meta; user.lastReview = req.body.meta;
// TODO: Error handling // NOTE: Error handling could be implemented here, but we can ensure that
// the user exists, as we just got his username (and entire data)
// from `userFromSession`.
await db.collection("users").updateOne({ await db.collection("users").updateOne({
username: user.username, username: user.username,
}, { }, {