add config

src/framework/configuration/configuration.ts

@@ -0,0 +1,149 @@
+import ConfigurationDefinition, {DefinitionType} from "./ConfigurationDefinition";
+import {parser, ArgCollection} from "args-command-parser";
+
+const portDefinition = new ConfigurationDefinition()
+  .withName("port")
+  .withType(DefinitionType.Number)
+  .withArgName("port")
+  .withEnvName("port")
+  .withDescription("Port of the server.")
+  .isRequired()
+  .withValidator("");
+
+class Configuration {
+
+  private readonly definitions: Map<string, ConfigurationDefinition> = new Map();
+  private readonly values: Map<string, string[] | undefined> = new Map();
+  private readonly defaultCommand: string;
+  private readonly envPrefix: string;
+  private readonly arguments: ArgCollection;
+  public constructor (defaultCommand: string, envPrefix: string, ...definitions: ConfigurationDefinition[]) {
+    this.arguments = parser();
+    for (const definition of definitions) {
+      this.definitions.set(definition.getName(), definition);
+      this.values.set(definition.getName(), this.getInternalValue(definition));
+    }
+    this.defaultCommand = defaultCommand;
+    this.envPrefix = envPrefix;
+  }
+
+  public getCommand (): string {
+    return this.arguments.data.commands.join(" ");
+  }
+
+  public getValue (name: string): string | string[] | boolean | boolean[] | number | number[] | undefined {
+    const def = this.definitions.get(name);
+    const value = this.values.get(name) ?? [];
+    switch ( def?.getType() ) {
+      case DefinitionType.Boolean: {
+        const result = this.toBoolean(value);
+        if(def.getMultiple()) {
+          return result;
+        }
+        return result[0];
+        break;
+      }
+      case DefinitionType.Number: {
+        const result: number[] = this.toInteger(value);
+        if(def.getMultiple()) {
+          return result;
+        }
+        return result[0];
+        break;
+      }
+      case DefinitionType.String: {
+        if(def.getMultiple()) {
+          return value;
+        }
+        return value[0];
+        break;
+      }
+    }
+  }
+
+  public getBooleanValue (name: string): boolean | boolean[] | undefined {
+    const def = this.definitions.get(name);
+    if(def?.getType() == DefinitionType.Boolean) {
+      const value = this.values.get(name) ?? [];
+      const result: boolean[] = this.toBoolean(value);
+      if(def.getMultiple()) {
+        return result;
+      }
+      return result[0];
+    }
+    return undefined;
+  }
+
+  public getNumberValue (name: string): number | number[] | undefined {
+    const def = this.definitions.get(name);
+    if(def?.getType() == DefinitionType.Number) {
+      const value = this.values.get(name) ?? [];
+      const result: number[] = this.toInteger(value);
+      if(def.getMultiple()) {
+        return result;
+      }
+      return result[0];
+    }
+    return undefined;
+  }
+
+  public getStringValue (name: string): string | string[] | undefined {
+    const def = this.definitions.get(name);
+    if(def?.getType() == DefinitionType.String) {
+      const value = this.values.get(name) ?? [];
+      if(def.getMultiple()) {
+        return value;
+      }
+      return value[0];
+    }
+    return undefined;
+  }
+
+  private toBoolean (value: string[]): boolean[] {
+    const result: boolean[] = [];
+    for (const v of value) {
+      result.push(v === "true" || v === "1" || v === "y");
+    }
+    return result;
+  }
+  
+  private toInteger (value: string[]): number[] {
+    const result: number[] = [];
+    for (const v of value) {
+      const f = parseFloat(v); const i = parseInt(v);
+      result.push((f == i) ? i : f);
+    }
+    return result;
+  }
+
+  private getInternalValue (def: ConfigurationDefinition): string[] | undefined {
+    let value = this.getArgValue(def);
+    value = (value === undefined)?this.getEnvValue(def):value;
+    if(value !== undefined) {
+      return value;
+    }
+    return undefined;
+  }
+
+  private getEnvValue (def: ConfigurationDefinition): string[] | undefined {
+    const value = process.env[this.envPrefix + "_" + def.getEnvName().toUpperCase()];
+    if(value !== undefined)
+      return [value];
+    else
+      return undefined;
+  }
+
+  private getArgValue (def: ConfigurationDefinition): string[] | undefined{
+    for (const arg of def.getArgName()) {
+      if(arg.length >= 2 && this.arguments.hasLongSwitch(arg)) {
+        return this.arguments.getLongSwitch(arg).values;
+      } else if (this.arguments.hasShortSwitch(arg)) {
+        return this.arguments.getShortSwitch(arg).values;
+      }
+    }
+    return undefined;
+  }
+
+}
+
+export default new Configuration("startServer", "ant", portDefinition);