Update to SvelteKit

[rbdr/forum] / src / utils / glyph_hash.js

diff --git a/src/utils/glyph_hash.js b/src/utils/glyph_hash.js
new file mode 100644 (file)
index 0000000..120c02a
--- /dev/null
+++ b/src/utils/glyph_hash.js
@@ -0,0 +1,38 @@
+const internals = {
+  kSplitterRegex: /.{1,8}/g,
+  kGlyphs: [
+    '☽',
+    '☆',
+    '♢',
+    '♡',
+    '╱',
+    '╲',
+    '╳',
+    '〰',
+    '▷',
+    '⏊',
+    '〒',
+    '▢',
+    '◯',
+    '⏃',
+    '⏀',
+    '⏆'
+  ]
+};
+
+// Return a glyph with color based on a 4 byte fragment of a UUIDv4
+const getGlyphHashFragment = function (uuidFragment) {
+
+  const glyphIndex = parseInt(uuidFragment.substring(0,2), 16) % 16;
+  return {
+    glyph: internals.kGlyphs[glyphIndex],
+    color: `#${uuidFragment.substring(2,8)}`
+  };
+};
+
+// Return an array of glyphs based on a UUIDv4
+export const getGlyphHash = function (uuid) {
+
+  const hashFragments = uuid.match(internals.kSplitterRegex);
+  return hashFragments.map(getGlyphHashFragment);
+};