Initial lens implementation

helpers/lenses/lenses.js

@@ -0,0 +1,37 @@
+import jsonLens from "./jsonLens"
+import rawLens from "./rawLens"
+import imageLens from "./imageLens"
+import htmlLens from "./htmlLens"
+
+const lenses = [
+  jsonLens,
+  imageLens,
+  htmlLens,
+
+  // Keep Raw Lens as the last option
+  rawLens,
+]
+
+function getSuitableLenses(response) {
+  const result = []
+
+  if (response && response.headers && response.headers["content-type"]) {
+    const properContentType = response.headers["content-type"].split(";")[0]
+
+    for (const lens of lenses) {
+      if (
+        lens.supportedContentTypes === null ||
+        lens.supportedContentTypes.includes(properContentType)
+      ) {
+        result.push(lens)
+      }
+    }
+  } else {
+    // We don't know the content type, so lets just add rawLens
+    result.push(rawLens)
+  }
+
+  return result
+}
+
+export default getSuitableLenses