[enh][m]: update theme (#40)

themes/base.ts

@@ -0,0 +1,8 @@
+export default {
+  primary: '#896A00',
+  secondary: '#254E70',
+  black: '#0C0C0C',
+  positive: '#0C0C0C',
+  textPrimary: '#896A00',
+  backgroundPrimary: '#FAEEC5',
+};

themes/index.ts

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+import base from './base';
+import { IThemes } from './utils';
+
+/**
+ * The default theme to load
+ */
+export const DEFAULT_THEME: string = 'base';
+
+export const themes: IThemes = {
+  base,
+};

themes/primary.ts

@@ -0,0 +1,6 @@
+import { extend } from './utils';
+import base from './base';
+
+export default extend(base, {
+  // Custom styles for primary theme
+});

themes/utils.ts

@@ -0,0 +1,44 @@
+import { themes } from './index';
+
+export interface ITheme {
+  [key: string]: string;
+}
+
+export interface IThemes {
+  [key: string]: ITheme;
+}
+
+export interface IMappedTheme {
+  [key: string]: string | null;
+}
+
+export const mapTheme = (variables: ITheme): IMappedTheme => {
+  return {
+    '--color-primary': variables.primary || '',
+    '--color-secondary': variables.secondary || '',
+    '--color-positive': variables.positive || '',
+    '--color-negative': variables.negative || '',
+    '--color-text-primary': variables.textPrimary || '',
+    '--background-primary': variables.backgroundPrimary || '',
+    '--background-sec': variables.backgroundSecondary || '',
+  };
+};
+
+export const applyTheme = (theme: string): void => {
+  const themeObject: IMappedTheme = mapTheme(themes[theme]);
+  if (!themeObject) return;
+
+  const root = document.documentElement;
+
+  Object.keys(themeObject).forEach((property) => {
+    if (property === 'name') {
+      return;
+    }
+
+    root.style.setProperty(property, themeObject[property]);
+  });
+};
+
+export const extend = (extending: ITheme, newTheme: ITheme): ITheme => {
+  return { ...extending, ...newTheme };
+};