Redis

Redis Stack
npm i @pi-r/redis [1]

Interface

import type { RediSearchSchema, RedisClientOptions, SearchOptions } from "redis";

import type { CommandOptions } from "@redis/client/dist/lib/client/commands-queue";
import type { ScanOptions } from "@redis/client/dist/lib/commands/SCAN";
import type { XReadOptions, XReadStreams } from '@redis/client/dist/lib/commands/XREAD';
import type { JsonGetOptions } from "@redis/json/dist/lib/commands/GET";
import type { CreateOptions } from "@redis/search/dist/lib/commands/CREATE";
import type { FtAggregateOptions } from "@redis/search/dist/lib/commands/AGGREGATE";
import type { FtSearchOptions } from "@redis/search/dist/lib/commands/SEARCH";

interface RedisDataSource extends DbDataSource {
    source: "redis";

    uri: string; // redis://<username>:<password>@hostname:6379
    username?: string; // redis://hostname:6379
    password?: string;
    credential?: string | ServerAuth;
    database?: number;

    format?: "HASH" | "JSON" | "HKEYS" | "HVALS" | "HSCAN" | "SMEMBERS"; // Default is "HASH"
    key?: RedisArgument | RedisArgument[];
    field?: RedisArgument;
    path?: string; // JSONPath

    /* Scan */
    cursor?: RedisArgument | RedisArgument[] | number | number[];
    iterations?: number | number[];

    search?: {
        index: string; // Preexisting schema
        query: string;
        schema?: RediSearchSchema; // Temporary schema
        schema?: string; // settings.directory.schema + users/username/?
        options?: CreateOptions;
    };
    aggregate?: {/* Same */};

    streams?: XReadStreams;

    options?: {
        client?: RedisClientOptions;
        command?: CommandOptions; // client.commandOptions
        get?: JsonGetOptions;
        search?: FtSearchOptions;
        aggregate?: FtAggregateOptions;
        xread?: XReadOptions;
        scan?: ScanOptions;
    };

    update?: RedisSetValue | RedisSetValue[] | RedisJSONValue | RedisJSONValue[]; // @pi-r/redis/types
    update?: {
        format: "JSON";
        key: string;
        value: unknown | unknown[]; // https://docs.redis.com/latest/stack/json/commands

        command?: "DEL" | "FORGET" | "MERGE" | "MSET" | "NUMINCRBY" | "NUMMULTBY" | "SET" | "STRAPPEND"; // Default is "SET"

        command?: "ARRAPPEND" | "ARRINDEX" | "ARRINSERT" | "ARRPOP" | "ARRTRIM";
        start?: number;
        stop?: number;
        index?: number;
    };
}

type RedisArgument = string | Buffer;
type RedisCredential = ServerAuth;

Pool

import type { RedisPoolOptions } from "redis";

interface PoolConfig { // using RedisPoolOptions
    min?: number; // minimum
    max?: number; // maximum
    timeout?: number; // acquireTimeout
}

Authentication

squared.db.json

{
  "redis": {
    "main": {
      "protocol": "", // Default is "redis:"
      "hostname": "", // Default is "localhost"
      "port": "", // Default is "6379"
      "username": "",
      "password": "",
      "database": 0 // SELECT index (number > 0)
    }
  }
}

{
  "dataSource": {
    "uri": "redis://localhost:6379",
    "username": "**********",
    "password": "**********",
    /* OR */
    "uri": "redis://<username>:<password>@localhost:6379/<database>",
    /* OR */
    "credential": "main",
    /* OR */
    "credential": {
      "protocol": "redis:",
      "server": "localhost:6379",
      "username": "**********",
      "password": "**********",
      "database": 1
    }
  }
}

Example usage

{
  "selector": "img",
  "type": "attribute",
  "dataSource": {
    "source": "redis",
    "credential": {/* Authentication */},

    "key": "demo:1",
    "format": "JSON",
    /* OR */
    "search": {
      "schema": {
        "name": {
          "type": "TEXT", // SchemaFieldTypes.TEXT
          "sortable": true
        },
        "state": "TAG", // SchemaFieldTypes.TAG
        "age": "NUMERIC" // SchemaFieldTypes.NUMERIC
      },
      /* OR */
      "schema": "./path/to/data.json", // yaml + json5 + toml + xml + cjs

      "query": "@state:{CA}",
      "options": {
        "ON": "HASH", // JSON
        "PREFIX": "noderedis:demo"
      }
    },

    /* Result: { "item_src": "redis.png", "item_alt": "Redis" } */
    "value": {
      "src": "item_src",
      "alt": "item_alt"
    },

    "usePool": true
  }
}

Note

Search will only return the value object with the id field appended as __id__.

@pi-r/redis

Added in version 0.11.0:

NPM package redis was upgraded to 5.8.0.
RedisDataSource property streams as XReadStreams was created.
RedisDataSource property format with type “SMEMBERS” using key as string was implemented.

Changed in version 0.11.0:

Package will be developed under pi-r2 for future releases.

Added in version 0.10.1:

DbPool static property CACHE_IGNORE through @pi-r/redis/client/pool as keyof RedisClientOptions was implemented.

Added in version 0.8.0:

RedisDataSource property format with type “HSCAN” and optional argument cursor | iterations was implemented.