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node_modules/@11ty/eleventy-img/src/memory-cache.js

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+const debug = require("debug")("Eleventy:Image");
+
+class MemoryCache {
+  constructor() {
+    this.cache = {};
+    this.hitCounter = 0;
+    this.missCounter = 0;
+  }
+
+  resetCount() {
+    this.hitCounter = 0;
+    this.missCounter = 0;
+  }
+
+  getCount() {
+    return [this.hitCounter, this.missCounter];
+  }
+
+  add(key, results) {
+    this.cache[key] = {
+      results
+    };
+
+    debug("Unique images processed: %o", this.size());
+  }
+
+  get(key, incrementCounts = false) {
+    if(this.cache[key]) {
+      if(incrementCounts) {
+        this.hitCounter++;
+      }
+      // debug("Images re-used (via in-memory cache): %o", this.hitCounter);
+
+      // may return promise
+      return this.cache[key].results;
+    }
+
+    if(incrementCounts) {
+      this.missCounter++;
+    }
+
+    return false;
+  }
+
+  has(key) {
+    return key in this.cache;
+  }
+
+  size() {
+    return Object.keys(this.cache).length;
+  }
+}
+
+module.exports = MemoryCache;