From cfaff61abf7ebfea3354c18fe57fdb047064de5f Mon Sep 17 00:00:00 2001
From: Bryan Ashby <bryan@l33t.codes>
Date: Sun, 7 Jun 2020 22:20:34 -0600
Subject: [PATCH] WIP new Configuration class

---
 core/config.js | 104 ++++++++++++++++++++++++++++++++++++++++++++++++-
 package.json   |   3 +-
 yarn.lock      |  13 +++++++
 3 files changed, 118 insertions(+), 2 deletions(-)

diff --git a/core/config.js b/core/config.js
index d50ff356..f6e7eee3 100644
--- a/core/config.js
+++ b/core/config.js
@@ -8,12 +8,114 @@ const DefaultConfig = require('./config_default');
 //  deps
 const paths = require('path');
 const async = require('async');
-const _ = require('lodash');
 const assert = require('assert');
 
+const _ = require('lodash');
+const reduceDeep = require('deepdash/getReduceDeep')(_);
+
 exports.init                = init;
 exports.getDefaultPath      = getDefaultPath;
 
+class Configuration {
+    constructor(path, options) {
+        this.current = {};
+    }
+
+    static create(path, options, cb) {
+
+    }
+
+    get() {
+        return this.current;
+    }
+
+    _convertTo(value, type) {
+        switch (type) {
+            case 'bool' :
+            case 'boolean' :
+                value = 'true' === value.toLowerCase();
+                break;
+
+            case 'number' :
+                {
+                    const num = parseInt(value);
+                    if (!isNaN(num)) {
+                        value = num;
+                    }
+                }
+                break;
+
+            case 'object' :
+                try {
+                    value = JSON.parse(value);
+                } catch(e) { }
+                break;
+
+            case 'date' :
+            case 'time' :
+            case 'datetime' :
+            case 'timestamp' :
+                {
+                    const m = moment(value);
+                    if (m.isValid()) {
+                        value = m;
+                    }
+                }
+                break;
+
+            case 'regex' :
+                //	:TODO: What flags to use, etc.?
+                break;
+        }
+
+        return value;
+    }
+
+    _resolveEnvironmentVariable(spec) {
+        const [prefix, varName, type, array] = spec.split(':');
+        if (!varName) {
+            return;
+        }
+
+        let value = process.env[varName];
+        if (!value) {
+            return;
+        }
+
+        if ('array' === array) {
+            value = value.split(',').map(v => this._convertTo(v, type));
+        } else {
+            value = this._convertTo(value, type);
+        }
+
+        return value;
+    }
+
+    _resolveCurrent() {
+        reduceDeep(
+            this.current,
+            (acc, value, key, parent, ctx) => {
+                //	resolve self references; there may be a better way...
+                if (_.isString(value) && '@' === value.charAt(0)) {
+                    if (value.startsWith('@reference:')) {
+                        value = value.slice(11);
+                        const ref = _.get(acc, value);
+                        if (ref) {
+                            _.set(acc, ctx.path, ref);
+                        }
+                    } else if (value.startsWith('@environment:')) {
+                        value = this._resolveEnvironmentVariable(value);
+                        if (!_.isUndefined(value)) {
+                            _.set(acc, ctx.path, value);
+                        }
+                    }
+                }
+                return acc;
+            }
+        );
+    }
+};
+
 let currentConfiguration = {};
 
 function hasMessageConferenceAndArea(config) {
diff --git a/package.json b/package.json
index 3c5c770d..509fde49 100644
--- a/package.json
+++ b/package.json
@@ -58,7 +58,8 @@
     "uuid-parse": "1.1.0",
     "ws": "^7.3.0",
     "xxhash": "^0.3.0",
-    "yazl": "^2.5.1"
+    "yazl": "^2.5.1",
+    "deepdash" : "^5.1.1"
   },
   "devDependencies": {},
   "engines": {
diff --git a/yarn.lock b/yarn.lock
index 492d4761..bd556bfc 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -372,6 +372,14 @@ deep-extend@^0.6.0:
   resolved "https://registry.yarnpkg.com/deep-extend/-/deep-extend-0.6.0.tgz#c4fa7c95404a17a9c3e8ca7e1537312b736330ac"
   integrity sha512-LOHxIOaPYdHlJRtCQfDIVZtfw/ufM8+rVj649RIHzcm/vGwQRXFt6OPqIFWsm2XEMrNIEtWR64sY1LEKD2vAOA==
 
+deepdash@^5.1.1:
+  version "5.1.1"
+  resolved "https://registry.yarnpkg.com/deepdash/-/deepdash-5.1.1.tgz#dcf68b9e15085b5df18bdb4011723790e0c40430"
+  integrity sha512-esz3pjQJaeYO4z74seqCMrOYUsAAdrhO3KJuEnGEaxTGbSy8VGOWn7jTU2J3nR5WDyNpS5/hse3m/hdM1/8ZWA==
+  dependencies:
+    lodash "^4.17.15"
+    lodash-es "^4.17.15"
+
 define-property@^0.2.5:
   version "0.2.5"
   resolved "https://registry.yarnpkg.com/define-property/-/define-property-0.2.5.tgz#c35b1ef918ec3c990f9a5bc57be04aacec5c8116"
@@ -978,6 +986,11 @@ later@1.2.0:
   resolved "https://registry.yarnpkg.com/later/-/later-1.2.0.tgz#f2cf6c4dd7956dd2f520adf0329836e9876bad0f"
   integrity sha1-8s9sTdeVbdL1IK3wMpg26YdrrQ8=
 
+lodash-es@^4.17.15:
+  version "4.17.15"
+  resolved "https://registry.yarnpkg.com/lodash-es/-/lodash-es-4.17.15.tgz#21bd96839354412f23d7a10340e5eac6ee455d78"
+  integrity sha512-rlrc3yU3+JNOpZ9zj5pQtxnx2THmvRykwL4Xlxoa8I9lHBlVbbyPhgyPMioxVZ4NqyxaVVtaJnzsyOidQIhyyQ==
+
 lodash@^4.17.15:
   version "4.17.15"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"