experimental re-embedding (#1186)

* first cut at re-embedding route and back-end support

* update and expand config route tests

* add scanpy_umap

* add reembedding to config route parameters

* front-end support for reembedding fetch and UI

* remove unused imports

* add loading state

* save reembedding in reducer state

* improve withColsFrom

* transmit reembed schema to client; pick unique embedding names

* display embeddings

* format

* lint

* spaces, tab size 2

* lint

* test hack for smoke-test race

* back out hack sleep

* add check for backed mode

* add unit test for reembedding

* lint

* hide re-embedding CLI param from help

client/src/reducers/layoutChoice.js

@@ -14,6 +14,14 @@ function bestDefaultLayout(layouts) {
   return layouts[0];
 }
 
+function setToDefaultLayout(world) {
+  const { schema } = world;
+  const available = schema.layout.obs.map(v => v.name).sort();
+  const current = bestDefaultLayout(available);
+  const currentDimNames = schema.layout.obsByName[current].dims;
+  return { available, current, currentDimNames };
+}
+
 const LayoutChoice = (
   state = {
     available: [], // all available choices
@@ -24,14 +32,13 @@ const LayoutChoice = (
   nextSharedState
 ) => {
   switch (action.type) {
-    case "universe exists, but loading is still in progress":
-    case "reset World to eq Universe": {
+    case "universe exists, but loading is still in progress": {
       // set default to default
-      const { schema } = nextSharedState.world;
-      const available = schema.layout.obs.map(v => v.name).sort();
-      const current = bestDefaultLayout(available);
-      const currentDimNames = schema.layout.obsByName[current].dims;
-      return { available, current, currentDimNames };
+      const { universe } = nextSharedState;
+      return {
+        ...state,
+        ...setToDefaultLayout(universe)
+      };
     }
 
     case "set layout choice": {
@@ -41,6 +48,31 @@ const LayoutChoice = (
       return { ...state, current, currentDimNames };
     }
 
+    case "reembed: add reembedding": {
+      const name = action.schema.name;
+      const available = Array.from(new Set(state.available).add(name));
+      return {
+        ...state,
+        available
+      };
+    }
+
+    case "reembed: clear all reembeddings": {
+      const { universe } = nextSharedState;
+      const { current } = state;
+      const dflt = setToDefaultLayout(universe);
+      if (dflt.available.includes(current)) {
+        return {
+          ...state,
+          available: dflt.available
+        };
+      }
+      return {
+        ...state,
+        ...dflt
+      };
+    }
+
     default: {
       return state;
     }