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Merge pull request #258 from animir/prisma-support
Implement RateLimiterPrisma
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,126 @@ | ||
| const RateLimiterStoreAbstract = require('./RateLimiterStoreAbstract'); | ||
| const RateLimiterRes = require('./RateLimiterRes'); | ||
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| class RateLimiterPrisma extends RateLimiterStoreAbstract { | ||
| /** | ||
| * Constructor for the rate limiter | ||
| * @param {Object} opts - Options for the rate limiter | ||
| */ | ||
| constructor(opts) { | ||
| super(opts); | ||
|
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| this.modelName = opts.tableName || 'RateLimiterFlexible'; | ||
| this.prismaClient = opts.storeClient; | ||
| this.clearExpiredByTimeout = opts.clearExpiredByTimeout || true; | ||
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| if (!this.prismaClient) { | ||
| throw new Error('Prisma client is not provided'); | ||
| } | ||
|
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| if (this.clearExpiredByTimeout) { | ||
| this._clearExpiredHourAgo(); | ||
| } | ||
| } | ||
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| _getRateLimiterRes(rlKey, changedPoints, result) { | ||
| const res = new RateLimiterRes(); | ||
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| let doc = result; | ||
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| res.isFirstInDuration = doc.points === changedPoints; | ||
| res.consumedPoints = doc.points; | ||
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| res.remainingPoints = Math.max(this.points - res.consumedPoints, 0); | ||
| res.msBeforeNext = doc.expire !== null | ||
| ? Math.max(new Date(doc.expire).getTime() - Date.now(), 0) | ||
| : -1; | ||
|
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| return res; | ||
| } | ||
|
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| _upsert(key, points, msDuration, forceExpire = false) { | ||
| if (!this.prismaClient) { | ||
| return Promise.reject(new Error('Prisma client is not established')); | ||
| } | ||
|
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| const now = new Date(); | ||
| const newExpire = msDuration > 0 ? new Date(now.getTime() + msDuration) : null; | ||
|
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| return this.prismaClient.$transaction(async (prisma) => { | ||
| const existingRecord = await prisma[this.modelName].findFirst({ | ||
| where: { key: key }, | ||
| }); | ||
|
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| if (existingRecord) { | ||
| // Determine if we should update the expire field | ||
| const shouldUpdateExpire = forceExpire || !existingRecord.expire || existingRecord.expire <= now || newExpire === null; | ||
|
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| return prisma[this.modelName].update({ | ||
| where: { key: key }, | ||
| data: { | ||
| points: !shouldUpdateExpire ? existingRecord.points + points : points, | ||
| ...(shouldUpdateExpire && { expire: newExpire }), | ||
| }, | ||
| }); | ||
| } else { | ||
| return prisma[this.modelName].create({ | ||
| data: { | ||
| key: key, | ||
| points: points, | ||
| expire: newExpire, | ||
| }, | ||
| }); | ||
| } | ||
| }); | ||
| } | ||
|
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| _get(rlKey) { | ||
| if (!this.prismaClient) { | ||
| return Promise.reject(new Error('Prisma client is not established')); | ||
| } | ||
|
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| return this.prismaClient[this.modelName].findFirst({ | ||
| where: { | ||
| AND: [ | ||
| { key: rlKey }, | ||
| { | ||
| OR: [ | ||
| { expire: { gt: new Date() } }, | ||
| { expire: null }, | ||
| ], | ||
| }, | ||
| ], | ||
| }, | ||
| }); | ||
| } | ||
|
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||
| _delete(rlKey) { | ||
| if (!this.prismaClient) { | ||
| return Promise.reject(new Error('Prisma client is not established')); | ||
| } | ||
|
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| return this.prismaClient[this.modelName].deleteMany({ | ||
| where: { | ||
| key: rlKey, | ||
| }, | ||
| }).then(res => res.count > 0); | ||
| } | ||
|
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| _clearExpiredHourAgo() { | ||
| if (this._clearExpiredTimeoutId) { | ||
| clearTimeout(this._clearExpiredTimeoutId); | ||
| } | ||
| this._clearExpiredTimeoutId = setTimeout(async () => { | ||
| await this.prismaClient[this.modelName].deleteMany({ | ||
| where: { | ||
| expire: { | ||
| lt: new Date(Date.now() - 3600000), | ||
| }, | ||
| }, | ||
| }); | ||
| this._clearExpiredHourAgo(); | ||
| }, 300000); // Clear every 5 minutes | ||
| } | ||
| } | ||
|
|
||
| module.exports = RateLimiterPrisma; |
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