Added env configuration for plugins

* Added env.

* Added tree config.

* Added tree.

* Fixed settings test.

* Added test cases.

src/node/utils/Settings.ts

@@ -27,6 +27,10 @@
  * limitations under the License.
  */
 
+import {MapArrayType} from "../types/MapType";
+import {SettingsNode, SettingsTree} from "./SettingsTree";
+import {coerce} from "semver";
+
 const absolutePaths = require('./AbsolutePaths');
 const deepEqual = require('fast-deep-equal/es6');
 const fs = require('fs');
@@ -50,10 +54,12 @@ const nonSettings = [
 
 // This is a function to make it easy to create a new instance. It is important to not reuse a
 // config object after passing it to log4js.configure() because that method mutates the object. :(
-const defaultLogConfig = (level:string) => ({appenders: {console: {type: 'console'}},
+const defaultLogConfig = (level: string) => ({
+    appenders: {console: {type: 'console'}},
     categories: {
         default: {appenders: ['console'], level},
-  }});
+    }
+});
 const defaultLogLevel = 'INFO';
 
 const initLogging = (config: any) => {
@@ -554,11 +560,16 @@ const coerceValue = (stringValue:string) => {
     }
 
     switch (stringValue) {
-    case 'true': return true;
-    case 'false': return false;
-    case 'undefined': return undefined;
-    case 'null': return null;
-    default: return stringValue;
+        case 'true':
+            return true;
+        case 'false':
+            return false;
+        case 'undefined':
+            return undefined;
+        case 'null':
+            return null;
+        default:
+            return stringValue;
     }
 };
 
@@ -598,14 +609,16 @@ const coerceValue = (stringValue:string) => {
  *
  * see: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#The_replacer_parameter
  */
-const lookupEnvironmentVariables = (obj: object) => {
-  const stringifiedAndReplaced = JSON.stringify(obj, (key, value) => {
+const lookupEnvironmentVariables = (obj: MapArrayType<any>) => {
+    const replaceEnvs = (obj: MapArrayType<any>) => {
+        for (let [key, value] of Object.entries(obj)) {
             /*
             * the first invocation of replacer() is with an empty key. Just go on, or
             * we would zap the entire object.
             */
             if (key === '') {
-      return value;
+                obj[key] = value;
+                continue
             }
 
             /*
@@ -616,10 +629,23 @@ const lookupEnvironmentVariables = (obj: object) => {
              * The environment variable expansion syntax "${ENV_VAR}" is just a string
              * of specific form, after all.
              */
-    if (typeof value !== 'string') {
-      return value;
+
+            if(key === 'undefined' || value === undefined) {
+                delete obj[key]
+                continue
             }
 
+            if ((typeof value !== 'string' && typeof value !== 'object') || value === null) {
+                obj[key] = value;
+                continue
+            }
+
+            if (typeof obj[key] === "object") {
+                replaceEnvs(obj[key]);
+                continue
+            }
+
+
             /*
              * Let's check if the string value looks like a variable expansion (e.g.:
              * "${ENV_VAR}" or "${ENV_VAR:default_value}")
@@ -629,8 +655,8 @@ const lookupEnvironmentVariables = (obj: object) => {
 
             if (match == null) {
                 // no match: use the value literally, without any substitution
-
-      return value;
+                obj[key] = value;
+                continue
             }
 
             /*
@@ -651,14 +677,16 @@ const lookupEnvironmentVariables = (obj: object) => {
                  * We have to return null, because if we just returned undefined, the
                  * configuration item "key" would be stripped from the returned object.
                  */
-      return null;
+                obj[key] = null;
+                continue
             }
 
             if ((envVarValue === undefined) && (defaultValue !== undefined)) {
                 logger.debug(`Environment variable "${envVarName}" not found for ` +
                     `configuration key "${key}". Falling back to default value.`);
 
-      return coerceValue(defaultValue);
+                obj[key] = coerceValue(defaultValue);
+                continue
             }
 
             // envVarName contained some value.
@@ -670,14 +698,42 @@ const lookupEnvironmentVariables = (obj: object) => {
             logger.debug(
                 `Configuration key "${key}" will be read from environment variable "${envVarName}"`);
 
-    return coerceValue(envVarValue!);
-  });
+            obj[key] = coerceValue(envVarValue!);
+        }
+        return obj
+    }
 
-  const newSettings = JSON.parse(stringifiedAndReplaced);
+    replaceEnvs(obj);
 
-  return newSettings;
+    // Add plugin ENV variables
+
+    /**
+     * If the key contains a double underscore, it's a plugin variable
+     * E.g.
+     */
+    let treeEntries = new Map<string, string | undefined>
+    const root = new SettingsNode("EP")
+
+    for (let [env, envVal] of Object.entries(process.env)) {
+        if (!env.startsWith("EP")) continue
+        treeEntries.set(env, envVal)
+    }
+    treeEntries.forEach((value, key) => {
+        let pathToKey = key.split("__")
+        let currentNode = root
+        let depth = 0
+        depth++
+        currentNode.addChild(pathToKey, value!)
+    })
+
+    //console.log(root.collectFromLeafsUpwards())
+    const rooting = root.collectFromLeafsUpwards()
+    console.log("Rooting is", rooting.ADMIN)
+    obj = Object.assign(obj, rooting)
+    return obj;
 };
 
+
 /**
  * - reads the JSON configuration file settingsFilename from disk
  * - strips the comments
@@ -718,9 +774,7 @@ const parseSettings = (settingsFilename:string, isSettings:boolean) => {
 
         logger.info(`${settingsType} loaded from: ${settingsFilename}`);
 
-    const replacedSettings = lookupEnvironmentVariables(settings);
-
-    return replacedSettings;
+        return lookupEnvironmentVariables(settings);
     } catch (e: any) {
         logger.error(`There was an error processing your ${settingsType} ` +
             `file from ${settingsFilename}: ${e.message}`);
@@ -814,7 +868,8 @@ exports.reloadSettings = () => {
         try {
             exports.sessionKey = fs.readFileSync(sessionkeyFilename, 'utf8');
             logger.info(`Session key loaded from: ${sessionkeyFilename}`);
-    } catch (err) { /* ignored */ }
+        } catch (err) { /* ignored */
+        }
         const keyRotationEnabled = exports.cookie.keyRotationInterval && exports.cookie.sessionLifetime;
         if (!exports.sessionKey && !keyRotationEnabled) {
             logger.info(
@@ -870,4 +925,3 @@ exports.exportedForTestingOnly = {
 
 // initially load settings
 exports.reloadSettings();
-

src/node/utils/SettingsTree.ts

@@ -0,0 +1,112 @@
+import {MapArrayType} from "../types/MapType";
+
+export class SettingsTree {
+    private children: Map<string, SettingsNode>;
+    constructor() {
+        this.children = new Map();
+    }
+
+    public addChild(key: string, value: string) {
+        this.children.set(key, new SettingsNode(key, value));
+    }
+
+    public removeChild(key: string) {
+        this.children.delete(key);
+    }
+
+    public getChild(key: string) {
+        return this.children.get(key);
+    }
+
+    public hasChild(key: string) {
+        return this.children.has(key);
+    }
+}
+
+
+export class SettingsNode {
+    private readonly key: string;
+    private value:  string | number | boolean | null | undefined;
+    private children: MapArrayType<SettingsNode>;
+
+    constructor(key: string, value?:  string | number | boolean | null | undefined) {
+        this.key = key;
+        this.value = value;
+        this.children = {}
+    }
+
+    public addChild(path: string[], value: string) {
+        let currentNode:SettingsNode = this;
+        for (let i = 0; i < path.length; i++) {
+            const key = path[i];
+            /*
+                Skip the current node if the key is the same as the current node's key
+             */
+            if (key === this.key ) {
+                continue
+            }
+            /*
+                If the current node does not have a child with the key, create a new node with the key
+             */
+            if (!currentNode.hasChild(key)) {
+                currentNode = currentNode.children[key] = new SettingsNode(key, this.coerceValue(value));
+            } else {
+                /*
+                 Else move to the child node
+                 */
+                currentNode = currentNode.getChild(key);
+            }
+        }
+    }
+
+
+    public collectFromLeafsUpwards() {
+        let collected:MapArrayType<any> = {};
+        for (const key in this.children) {
+            const child = this.children[key];
+            if (child.hasChildren()) {
+                collected[key] = child.collectFromLeafsUpwards();
+            } else {
+                collected[key] = child.value;
+            }
+        }
+        return collected;
+    }
+
+    coerceValue = (stringValue: string) => {
+        // cooked from https://stackoverflow.com/questions/175739/built-in-way-in-javascript-to-check-if-a-string-is-a-valid-number
+        // @ts-ignore
+        const isNumeric = !isNaN(stringValue) && !isNaN(parseFloat(stringValue) && isFinite(stringValue));
+
+        if (isNumeric) {
+            // detected numeric string. Coerce to a number
+
+            return +stringValue;
+        }
+
+        switch (stringValue) {
+            case 'true':
+                return true;
+            case 'false':
+                return false;
+            case 'undefined':
+                return undefined;
+            case 'null':
+                return null;
+            default:
+                return stringValue;
+        }
+    };
+
+    public hasChildren() {
+        return Object.keys(this.children).length > 0;
+    }
+
+    public getChild(key: string) {
+        return this.children[key];
+    }
+
+    public hasChild(key: string) {
+        return this.children[key] !== undefined;
+    }
+}

src/tests/backend/specs/settings.ts

@@ -58,4 +58,35 @@ describe(__filename, function () {
             });
         });
     });
+
+
+    describe("Parse plugin settings", function () {
+
+        before(async function () {
+            process.env["EP__ADMIN__PASSWORD"] = "test"
+        })
+
+        it('should parse plugin settings', async function () {
+            let settings = parseSettings(path.join(__dirname, 'settings.json'), true);
+            assert.equal(settings.ADMIN.PASSWORD, "test");
+        })
+
+        it('should bundle settings with same path', async function () {
+            process.env["EP__ADMIN__USERNAME"] = "test"
+            let settings = parseSettings(path.join(__dirname, 'settings.json'), true);
+            assert.deepEqual(settings.ADMIN, {PASSWORD: "test", USERNAME: "test"});
+        })
+
+        it("Can set the ep themes", async function () {
+            process.env["EP__ep_themes__default_theme"] = "hacker"
+            let settings = parseSettings(path.join(__dirname, 'settings.json'), true);
+            assert.deepEqual(settings.ep_themes, {"default_theme": "hacker"});
+        })
+
+        it("can set the ep_webrtc settings", async function () {
+            process.env["EP__ep_webrtc__enabled"] = "true"
+            let settings = parseSettings(path.join(__dirname, 'settings.json'), true);
+            assert.deepEqual(settings.ep_webrtc, {"enabled": true});
+        })
+    })
 });