feat: add new config strategy to backend

backend/src/config/config.controller.ts

@@ -0,0 +1,18 @@
+import { Controller, Get } from "@nestjs/common";
+import { ConfigService } from "./config.service";
+import { ConfigDTO } from "./dto/config.dto";
+
+@Controller("configs")
+export class ConfigController {
+  constructor(private configService: ConfigService) {}
+
+  @Get()
+  async list() {
+    return new ConfigDTO().fromList(await this.configService.list())
+  }
+
+  @Get("admin")
+  async listForAdmin() {
+    return await this.configService.listForAdmin();
+  }
+}

backend/src/config/config.module.ts

@@ -0,0 +1,21 @@
+import { Global, Module } from "@nestjs/common";
+import { PrismaService } from "src/prisma/prisma.service";
+import { ConfigController } from "./config.controller";
+import { ConfigService } from "./config.service";
+
+@Global()
+@Module({
+  providers: [
+    {
+      provide: "CONFIG_VARIABLES",
+      useFactory: async (prisma: PrismaService) => {
+        return await prisma.config.findMany();
+      },
+      inject: [PrismaService],
+    },
+    ConfigService,
+  ],
+  controllers: [ConfigController],
+  exports: [ConfigService],
+})
+export class ConfigModule {}

backend/src/config/config.service.ts

@@ -0,0 +1,41 @@
+import { Inject, Injectable } from "@nestjs/common";
+import { Config } from "@prisma/client";
+import { PrismaService } from "src/prisma/prisma.service";
+
+@Injectable()
+export class ConfigService {
+  constructor(
+    @Inject("CONFIG_VARIABLES") private configVariables: Config[],
+    private prisma: PrismaService
+  ) {}
+
+  get(key: string): any {
+    const configVariable = this.configVariables.filter(
+      (variable) => variable.key == key
+    )[0];
+
+    if (!configVariable) throw new Error(`Config variable ${key} not found`);
+
+    const value = configVariable.value ?? configVariable.default;
+
+    if (configVariable.type == "number") return parseInt(value);
+    if (configVariable.type == "boolean") return value == "true";
+    if (configVariable.type == "string") return value;
+  }
+
+  async listForAdmin() {
+    return await this.prisma.config.findMany();
+  }
+
+  async list() {
+    const configVariables = await this.prisma.config.findMany({
+      where: { secret: { equals: false } },
+    });
+
+    return configVariables.map((configVariable) => {
+      if (!configVariable.value) configVariable.value = configVariable.default;
+
+      return configVariable;
+    });
+  }
+}

backend/src/config/dto/config.dto.ts

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+import { Expose, plainToClass } from "class-transformer";
+
+export class ConfigDTO {
+  @Expose()
+  key: string;
+
+  @Expose()
+  value: string;
+
+  @Expose()
+  type: string;
+
+  fromList(partial: Partial<ConfigDTO>[]) {
+    return partial.map((part) =>
+      plainToClass(ConfigDTO, part, { excludeExtraneousValues: true })
+    );
+  }
+}