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Original file line number | Diff line number | Diff line change |
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import { SelectQueryBuilder } from 'typeorm'; | ||
import { Log } from '../models'; | ||
import { validateBody, wrapHandler } from './helpers'; | ||
import { IsDate, IsOptional, IsString } from 'class-validator'; | ||
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type ParsedQuery = { | ||
[key: string]: string | ParsedQuery; | ||
}; | ||
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const parseQueryString = (query: string): ParsedQuery => { | ||
// Parses a query string that is used to search the JSON payload of a record | ||
// Example => createdUserPayload.userId: 123124121424 | ||
const result: ParsedQuery = {}; | ||
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const parts = query.match(/(\w+(\.\w+)*):\s*[^:]+/g); | ||
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if (!parts) { | ||
return result; | ||
} | ||
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parts.forEach((part) => { | ||
const [key, value] = part.split(/:(.+)/); | ||
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if (!key || value === undefined) return; | ||
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const keyParts = key.trim().split('.'); | ||
let current = result; | ||
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keyParts.forEach((part, index) => { | ||
if (index === keyParts.length - 1) { | ||
current[part] = value.trim(); | ||
} else { | ||
if (!current[part]) { | ||
current[part] = {}; | ||
} | ||
current = current[part] as ParsedQuery; | ||
} | ||
}); | ||
}); | ||
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return result; | ||
}; | ||
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const generateSqlConditions = ( | ||
parsedQuery: ParsedQuery, | ||
jsonPath: string[] = [] | ||
): string[] => { | ||
const conditions: string[] = []; | ||
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for (const [key, value] of Object.entries(parsedQuery)) { | ||
if (typeof value === 'object') { | ||
const newPath = [...jsonPath, key]; | ||
conditions.push(...generateSqlConditions(value, newPath)); | ||
} else { | ||
const jsonField = | ||
jsonPath.length > 0 | ||
? `${jsonPath.map((path) => `'${path}'`).join('->')}->>'${key}'` | ||
: `'${key}'`; | ||
conditions.push( | ||
`payload ${ | ||
jsonPath.length > 0 ? '->' : '->>' | ||
} ${jsonField} = '${value}'` | ||
); | ||
} | ||
} | ||
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return conditions; | ||
}; | ||
class Filter { | ||
@IsString() | ||
value: string; | ||
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@IsString() | ||
operator?: string; | ||
} | ||
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class DateFilter { | ||
@IsDate() | ||
value: string; | ||
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@IsString() | ||
operator: | ||
| 'is' | ||
| 'not' | ||
| 'after' | ||
| 'onOrAfter' | ||
| 'before' | ||
| 'onOrBefore' | ||
| 'empty' | ||
| 'notEmpty'; | ||
} | ||
class LogSearch { | ||
@IsOptional() | ||
eventType?: Filter; | ||
@IsOptional() | ||
result?: Filter; | ||
@IsOptional() | ||
timestamp?: Filter; | ||
@IsOptional() | ||
payload?: Filter; | ||
} | ||
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const generateDateCondition = (filter: DateFilter): string => { | ||
const { operator } = filter; | ||
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switch (operator) { | ||
case 'is': | ||
return `log.createdAt = :timestamp`; | ||
case 'not': | ||
return `log.createdAt != :timestamp`; | ||
case 'after': | ||
return `log.createdAt > :timestamp`; | ||
case 'onOrAfter': | ||
return `log.createdAt >= :timestamp`; | ||
case 'before': | ||
return `log.createdAt < :timestamp`; | ||
case 'onOrBefore': | ||
return `log.createdAt <= :timestamp`; | ||
case 'empty': | ||
return `log.createdAt IS NULL`; | ||
case 'notEmpty': | ||
return `log.createdAt IS NOT NULL`; | ||
default: | ||
throw new Error('Invalid operator'); | ||
} | ||
}; | ||
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const filterResultQueryset = async (qs: SelectQueryBuilder<Log>, filters) => { | ||
if (filters?.eventType) { | ||
qs.andWhere('log.eventType ILIKE :eventType', { | ||
eventType: `%${filters?.eventType?.value}%` | ||
}); | ||
} | ||
if (filters?.result) { | ||
qs.andWhere('log.result ILIKE :result', { | ||
result: `%${filters?.result?.value}%` | ||
}); | ||
} | ||
if (filters?.payload) { | ||
try { | ||
const parsedQuery = parseQueryString(filters?.payload?.value); | ||
const conditions = generateSqlConditions(parsedQuery); | ||
qs.andWhere(conditions[0]); | ||
} catch (error) {} | ||
} | ||
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if (filters?.timestamp) { | ||
const timestampCondition = generateDateCondition(filters?.timestamp); | ||
try { | ||
} catch (error) {} | ||
qs.andWhere(timestampCondition, { | ||
timestamp: new Date(filters?.timestamp?.value) | ||
}); | ||
} | ||
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return qs; | ||
}; | ||
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export const list = wrapHandler(async (event) => { | ||
const search = await validateBody(LogSearch, event.body); | ||
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const qs = Log.createQueryBuilder('log'); | ||
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const filterQs = await filterResultQueryset(qs, search); | ||
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const [results, resultsCount] = await filterQs.getManyAndCount(); | ||
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return { | ||
statusCode: 200, | ||
body: JSON.stringify({ | ||
result: results, | ||
count: resultsCount | ||
}) | ||
}; | ||
}); |
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,19 @@ | ||
import { BaseEntity, Column, Entity, PrimaryGeneratedColumn } from 'typeorm'; | ||
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@Entity() | ||
export class Log extends BaseEntity { | ||
@PrimaryGeneratedColumn('uuid') | ||
id: string; | ||
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@Column('json') | ||
payload: Object; | ||
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@Column({ nullable: false }) | ||
createdAt: Date; | ||
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@Column({ nullable: true }) | ||
eventType: string; | ||
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@Column({ nullable: false }) | ||
result: string; | ||
} |
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