2nd

2025-09-11 20:50:34 +00:00
parent 500166b0bc
commit de69b3d4de
18 changed files with 2427 additions and 0 deletions
@@ -0,0 +1,97 @@
+const Ajv = require("ajv")
+const confSchema = require('./configSchema.json')
+
+let  DynamoDBClient, GetItemCommand, marshall, unmarshall
+
+module.exports = class configHelper {
+
+    constructor(options){
+        this.config = {}
+        if(options.onAws) {
+            DynamoDBClient = require("@aws-sdk/client-dynamodb").DynamoDBClient
+            GetItemCommand = require("@aws-sdk/client-dynamodb").GetItemCommand
+            marshall = require("@aws-sdk/util-dynamodb").marshall
+            unmarshall = require("@aws-sdk/util-dynamodb").unmarshall
+            this. dynamoClient = new DynamoDBClient({ region: options.awsRegion })
+
+            this.awsTable = options.awsTable
+            this.awsServiceName = options.awsServiceName
+            this.fetchConfig = this.fetchConfigDynamo
+            this.refreshAccessRights = this.refreshAccessRightsDynamo
+        } else {
+            this.localfile = options.localfile
+            this.fetchConfig = this.fetchConfigFile
+            this.refreshAccessRights = this.refreshAccessRightsFile
+        }
+        const ajv = new Ajv({
+            allowUnionTypes: true
+        })
+        this.configValidator = ajv.compile(confSchema)        
+    }
+
+    isValidConfig(conf){
+        if(this.configValidator(conf)) return(true)
+        console.error('Invalid configuration: ', this.configValidator.errors)
+        return(false)
+    }
+
+    async dynamoGet(subKey = null){
+        let params = new GetItemCommand({
+            TableName: this.awsTable,
+            Key: {
+                serviceName: marshall(this.awsServiceName),
+            },
+          })
+        
+        let result = await this.dynamoClient.send(params)
+        let obj = unmarshall(result.Item)
+        if((typeof(subKey)=='string') && (subKey in obj)) return(obj[subKey])
+        return(obj)
+    }
+
+    async fetchConfigDynamo(){
+        let curConfig = this.config
+        this.config = await this.dynamoGet()
+
+        if(process.env.UNSECURE)        this.config.server.unsecure = Boolean(process.env.UNSECURE);
+        if(process.env.REDIS_HOST)      this.config.redis.host = process.env.REDIS_HOST;
+        if(process.env.REDIS_TLS)       this.config.redis.tls = Boolean(process.env.REDIS_TLS);
+        if(process.env.REDIS_PORT)      this.config.redis.port = Number(process.env.REDIS_PORT);
+        if(process.env.REDIS_USER)      this.config.redis.user = process.env.REDIS_USER;
+        if(process.env.REDIS_PASSWORD)  this.config.redis.pass = process.env.REDIS_PASSWORD;
+    
+        if(this.isValidConfig(this.config)) return(this.config)
+        console.error(this.isValidConfig.errors)
+        //revert if invalid conf
+        this.config = curConfig        
+    }
+
+    async fetchConfigFile(){
+        let curConfig = this.config
+        this.config = await require(this.localfile)
+        if(this.isValidConfig(this.config)) return(this.config)
+        console.error(this.isValidConfig.errors)
+        //revert if invalid conf
+        this.config = curConfig
+    }
+
+    async refreshAccessRightsDynamo(){
+        let ar =  await this.dynamoGet('accessRights')
+        this.config.accessRights = ar
+    }
+
+    async refreshAccessRightsFile(){
+        delete require.cache[require.resolve(this.localfile)]
+        let tmp
+        try { tmp = require(this.localfile) }
+        catch(err) { 
+            console.error('Error Reloading config !! (bad json?) => Keeping current accessRights !')
+            return 
+        }
+        if(!tmp.accessRights) {
+            console.error('Error Reloading config !! (no accessRights !) => Keeping current accessRights !')
+            return           
+        }
+        this.config.accessRights = tmp.accessRights
+    }
+}