STEINNI
98 lines
3.6 KiB
JavaScript
98 lines
3.6 KiB
JavaScript
const Ajv = require("ajv")
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const confSchema = require('./configSchema.json')
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let DynamoDBClient, GetItemCommand, marshall, unmarshall
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module.exports = class configHelper {
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constructor(options){
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this.config = {}
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if(options.onAws) {
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DynamoDBClient = require("@aws-sdk/client-dynamodb").DynamoDBClient
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GetItemCommand = require("@aws-sdk/client-dynamodb").GetItemCommand
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marshall = require("@aws-sdk/util-dynamodb").marshall
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unmarshall = require("@aws-sdk/util-dynamodb").unmarshall
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this. dynamoClient = new DynamoDBClient({ region: options.awsRegion })
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this.awsTable = options.awsTable
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this.awsServiceName = options.awsServiceName
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this.fetchConfig = this.fetchConfigDynamo
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this.refreshAccessRights = this.refreshAccessRightsDynamo
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} else {
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this.localfile = options.localfile
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this.fetchConfig = this.fetchConfigFile
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this.refreshAccessRights = this.refreshAccessRightsFile
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}
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const ajv = new Ajv({
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allowUnionTypes: true
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})
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this.configValidator = ajv.compile(confSchema)
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}
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isValidConfig(conf){
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if(this.configValidator(conf)) return(true)
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console.error('Invalid configuration: ', this.configValidator.errors)
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return(false)
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}
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async dynamoGet(subKey = null){
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let params = new GetItemCommand({
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TableName: this.awsTable,
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Key: {
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serviceName: marshall(this.awsServiceName),
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},
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})
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let result = await this.dynamoClient.send(params)
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let obj = unmarshall(result.Item)
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if((typeof(subKey)=='string') && (subKey in obj)) return(obj[subKey])
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return(obj)
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}
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async fetchConfigDynamo(){
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let curConfig = this.config
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this.config = await this.dynamoGet()
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if(process.env.UNSECURE) this.config.server.unsecure = Boolean(process.env.UNSECURE);
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if(process.env.REDIS_HOST) this.config.redis.host = process.env.REDIS_HOST;
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if(process.env.REDIS_TLS) this.config.redis.tls = Boolean(process.env.REDIS_TLS);
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if(process.env.REDIS_PORT) this.config.redis.port = Number(process.env.REDIS_PORT);
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if(process.env.REDIS_USER) this.config.redis.user = process.env.REDIS_USER;
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if(process.env.REDIS_PASSWORD) this.config.redis.pass = process.env.REDIS_PASSWORD;
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if(this.isValidConfig(this.config)) return(this.config)
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console.error(this.isValidConfig.errors)
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//revert if invalid conf
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this.config = curConfig
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}
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async fetchConfigFile(){
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let curConfig = this.config
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this.config = await require(this.localfile)
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if(this.isValidConfig(this.config)) return(this.config)
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console.error(this.isValidConfig.errors)
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//revert if invalid conf
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this.config = curConfig
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}
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async refreshAccessRightsDynamo(){
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let ar = await this.dynamoGet('accessRights')
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this.config.accessRights = ar
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}
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async refreshAccessRightsFile(){
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delete require.cache[require.resolve(this.localfile)]
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let tmp
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try { tmp = require(this.localfile) }
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catch(err) {
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console.error('Error Reloading config !! (bad json?) => Keeping current accessRights !')
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return
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}
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if(!tmp.accessRights) {
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console.error('Error Reloading config !! (no accessRights !) => Keeping current accessRights !')
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return
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}
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this.config.accessRights = tmp.accessRights
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}
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}
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