feat(utils): add `getTagComparator` that generate comparator, only numFirst supported

src/scripts/taglist-order.js

@@ -56,3 +56,35 @@ export const splitTagToArray = (tag) =>
     .split('')
     .reduce(tagReduce, [])
     .map((e) => (isDigit(e.charAt(0)) ? parseInt(e) : e));
+
+const applyOrder = (order, e1, e2) => {
+  if (e1 === e2) {
+    return 0;
+  }
+  if (order.numFirst) {
+    if (typeof e1 === 'number') {
+      const factor = order.numAsc ? 1 : -1;
+      return typeof e2 === 'number' ? (e1 - e2) * factor : -1;
+    } else if (typeof e2 === 'number') {
+      return 1;
+    } else {
+      const factor = order.alphaAsc ? 1 : -1;
+      return e1.localeCompare(e2) * factor
+    }
+  }
+};
+
+export const getTagComparator = (order) => {
+  return (e1, e2) => {
+    const tag1 = splitTagToArray(e1.tag || e1);
+    const tag2 = splitTagToArray(e2.tag || e2);
+
+    for (var i = 0; i < tag1.length && i < tag2.length; i++) {
+      const compare = applyOrder(order, tag1[i], tag2[i]);
+      if (compare != 0) {
+        return compare;
+      }
+    }
+    return (e1.tag || e1).length - (e2.tag || e2).length;
+  };
+};

test/taglist-order.test.js

@@ -1,4 +1,5 @@
 import { taglistOrderVariants, taglistOrderParser, splitTagToArray } from '../src/scripts/taglist-order.js';
+import { getTagComparator } from '../src/scripts/taglist-order.js';
 import { DockerRegistryUIError } from '../src/scripts/error.js';
 import assert from 'assert';
 
@@ -84,4 +85,38 @@ describe('utils tests', () => {
       assert.deepEqual(splitTagToArray('alpine-lts'), ['alpine-lts']);
     });
   });
+
+  describe('getTagComparator', () => {
+    it('should sort tags with `num-asc;alpha-asc`', () => {
+      const comparator = getTagComparator(taglistOrderParser('num-asc;alpha-asc'));
+
+      assert.deepEqual(['0.2.4', '1.2.5', '0.2.5'].sort(comparator), ['0.2.4', '0.2.5', '1.2.5']);
+      assert.deepEqual(['latest', '0.2.4', 'main'].sort(comparator), ['0.2.4', 'latest', 'main']);
+      assert.deepEqual(['latest', '1.0.0-SNAPSHOT', '1.0.0'].sort(comparator), ['1.0.0', '1.0.0-SNAPSHOT', 'latest']);
+    });
+
+    it('should sort tags with `num-desc;alpha-asc`', () => {
+      const comparator = getTagComparator(taglistOrderParser('num-desc;alpha-asc'));
+
+      assert.deepEqual(['0.2.4', '1.2.5', '0.2.5'].sort(comparator), ['1.2.5', '0.2.5', '0.2.4']);
+      assert.deepEqual(['latest', '0.2.4', 'main'].sort(comparator), ['0.2.4', 'latest', 'main']);
+      assert.deepEqual(['latest', '1.0.0-SNAPSHOT', '1.0.0'].sort(comparator), ['1.0.0', '1.0.0-SNAPSHOT', 'latest']);
+    });
+
+    it('should sort tags with `num-asc;alpha-desc`', () => {
+      const comparator = getTagComparator(taglistOrderParser('num-asc;alpha-desc'));
+
+      assert.deepEqual(['0.2.4', '1.2.5', '0.2.5'].sort(comparator), ['0.2.4', '0.2.5', '1.2.5']);
+      assert.deepEqual(['latest', '0.2.4', 'main'].sort(comparator), ['0.2.4', 'main', 'latest']);
+      assert.deepEqual(['latest', '1.0.0-SNAPSHOT', '1.0.0'].sort(comparator), ['1.0.0', '1.0.0-SNAPSHOT', 'latest']);
+    });
+
+    it('should sort tags with `num-desc;alpha-desc`', () => {
+      const comparator = getTagComparator(taglistOrderParser('num-desc;alpha-desc'));
+
+      assert.deepEqual(['0.2.4', '1.2.5', '0.2.5'].sort(comparator), ['1.2.5', '0.2.5', '0.2.4']);
+      assert.deepEqual(['latest', '0.2.4', 'main'].sort(comparator), ['0.2.4', 'main', 'latest']);
+      assert.deepEqual(['latest', '1.0.0-SNAPSHOT', '1.0.0'].sort(comparator), ['1.0.0', '1.0.0-SNAPSHOT', 'latest']);
+    });
+  });
 });