From bb907d98801b279db270b7820cec04bd7ac80df0 Mon Sep 17 00:00:00 2001
From: trading_peter <pk@codeblob.work>
Date: Sat, 12 Mar 2022 22:45:49 +0100
Subject: [PATCH] Initial version

---
 README.md     |  2 +-
 dataStore.js  | 37 +++++++++++++++++++++++++++++++++++++
 package.json  | 13 +++++--------
 store.js      | 39 +++++++++++++++++++++++++++++++++++++++
 tp-element.js | 35 -----------------------------------
 5 files changed, 82 insertions(+), 44 deletions(-)
 create mode 100644 dataStore.js
 create mode 100644 store.js
 delete mode 100644 tp-element.js

diff --git a/README.md b/README.md
index 1ab27b7..0e6b018 100644
--- a/README.md
+++ b/README.md
@@ -1 +1 @@
-# tp-element
+# tp-store
diff --git a/dataStore.js b/dataStore.js
new file mode 100644
index 0000000..4caf0ad
--- /dev/null
+++ b/dataStore.js
@@ -0,0 +1,37 @@
+/**
+@license
+Copyright (c) 2022 trading_peter
+This program is available under Apache License Version 2.0
+*/
+
+const data = new Map();
+const instancesPerKey = new Map();
+
+export const DataStore = new class {
+  addInstance(instance, key, targetProperty) {
+    if (instancesPerKey.has(key) === false) {
+      instancesPerKey.set(key, [ { instance, targetProperty } ]);
+    } else {
+      instancesPerKey.get(key).push({ instance, targetProperty });
+    }
+
+    if (data.has(key)) {
+      this._notifyInstance(instance, key, data.get(key), targetProperty);
+    }
+  }
+
+  writeKey(key, value) {
+    data.set(key, value);
+
+    const instances = instancesPerKey.get(key);
+    if (Array.isArray(instances)) {
+      instances.forEach(entry => {
+        this._notifyInstance(entry.instance, key, value, entry.targetProperty);
+      });
+    }
+  }
+
+  _notifyInstance(instance, key, value, targetProperty) {
+    instance._storeUpdated(key, value, targetProperty);
+  }
+};
diff --git a/package.json b/package.json
index c39fdff..8a07eef 100644
--- a/package.json
+++ b/package.json
@@ -1,18 +1,15 @@
 {
-  "name": "@tp/tp-element",
-  "version": "0.0.1",
+  "name": "@tp/tp-store",
+  "version": "1.0.0",
   "description": "",
-  "main": "tp-element.js",
+  "main": "tp-store.js",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "repository": {
     "type": "git",
-    "url": "https://gitea.codeblob.work/tp-elements/tp-element.git"
+    "url": "https://gitea.codeblob.work/tp-stores/tp-store.git"
   },
   "author": "trading_peter",
-  "license": "Apache-2.0",
-  "dependencies": {
-    "lit": "^2.2.0"
-  }
+  "license": "Apache-2.0"
 }
diff --git a/store.js b/store.js
new file mode 100644
index 0000000..356b32d
--- /dev/null
+++ b/store.js
@@ -0,0 +1,39 @@
+/**
+@license
+Copyright (c) 2022 trading_peter
+This program is available under Apache License Version 2.0
+*/
+
+import { DataStore } from './dataStore';
+
+/**
+ * # Store
+ *
+ * A simple key value store.
+ */
+export const Store = function(superClass) {
+  return class extends superClass {
+    _storeSubscribe(keys) {
+      if (Array.isArray(keys) === false) {
+        keys = [ keys ];
+      }
+
+      keys.forEach(key => {
+        let targetProperty;
+        if (typeof key === 'object') {
+          targetProperty = key.targetProperty;
+          key = key.key;
+        }
+        DataStore.addInstance(this, key, targetProperty);
+      });
+    }
+
+    _storeUpdated(key, newValue, targetProperty) {
+      this[targetProperty || key] = newValue;
+    }
+
+    _storeWrite(key, value) {
+      DataStore.writeKey(key, value);
+    }
+  };
+}
diff --git a/tp-element.js b/tp-element.js
deleted file mode 100644
index 6a92a2f..0000000
--- a/tp-element.js
+++ /dev/null
@@ -1,35 +0,0 @@
-/**
-@license
-Copyright (c) 2022 trading_peter
-This program is available under Apache License Version 2.0
-*/
-
-import { LitElement, html, css } from 'lit';
-
-class TpElement extends LitElement {
-  static get styles() {
-    return [
-      css`
-        :host {
-          display: block;
-        }
-      `
-    ];
-  }
-
-  render() {
-    const { } = this;
-
-    return html`
-
-    `;
-  }
-
-  static get properties() {
-    return { };
-  }
-
-
-}
-
-window.customElements.define('tp-element', TpElement);