planning

node_modules/apollo-cache/src/utils.ts

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+import {
+  DocumentNode,
+  OperationDefinitionNode,
+  SelectionSetNode,
+  FieldNode,
+  FragmentDefinitionNode,
+} from 'graphql';
+
+export function queryFromPojo(obj: any): DocumentNode {
+  const op: OperationDefinitionNode = {
+    kind: 'OperationDefinition',
+    operation: 'query',
+    name: {
+      kind: 'Name',
+      value: 'GeneratedClientQuery',
+    },
+    selectionSet: selectionSetFromObj(obj),
+  };
+
+  const out: DocumentNode = {
+    kind: 'Document',
+    definitions: [op],
+  };
+
+  return out;
+}
+
+export function fragmentFromPojo(obj: any, typename?: string): DocumentNode {
+  const frag: FragmentDefinitionNode = {
+    kind: 'FragmentDefinition',
+    typeCondition: {
+      kind: 'NamedType',
+      name: {
+        kind: 'Name',
+        value: typename || '__FakeType',
+      },
+    },
+    name: {
+      kind: 'Name',
+      value: 'GeneratedClientQuery',
+    },
+    selectionSet: selectionSetFromObj(obj),
+  };
+
+  const out: DocumentNode = {
+    kind: 'Document',
+    definitions: [frag],
+  };
+
+  return out;
+}
+
+function selectionSetFromObj(obj: any): SelectionSetNode {
+  if (
+    typeof obj === 'number' ||
+    typeof obj === 'boolean' ||
+    typeof obj === 'string' ||
+    typeof obj === 'undefined' ||
+    obj === null
+  ) {
+    // No selection set here
+    return null;
+  }
+
+  if (Array.isArray(obj)) {
+    // GraphQL queries don't include arrays
+    return selectionSetFromObj(obj[0]);
+  }
+
+  // Now we know it's an object
+  const selections: FieldNode[] = [];
+
+  Object.keys(obj).forEach(key => {
+    const nestedSelSet: SelectionSetNode = selectionSetFromObj(obj[key]);
+
+    const field: FieldNode = {
+      kind: 'Field',
+      name: {
+        kind: 'Name',
+        value: key,
+      },
+      selectionSet: nestedSelSet || undefined,
+    };
+
+    selections.push(field);
+  });
+
+  const selectionSet: SelectionSetNode = {
+    kind: 'SelectionSet',
+    selections,
+  };
+
+  return selectionSet;
+}
+
+export const justTypenameQuery: DocumentNode = {
+  kind: 'Document',
+  definitions: [
+    {
+      kind: 'OperationDefinition',
+      operation: 'query',
+      name: null,
+      variableDefinitions: null,
+      directives: [],
+      selectionSet: {
+        kind: 'SelectionSet',
+        selections: [
+          {
+            kind: 'Field',
+            alias: null,
+            name: {
+              kind: 'Name',
+              value: '__typename',
+            },
+            arguments: [],
+            directives: [],
+            selectionSet: null,
+          },
+        ],
+      },
+    },
+  ],
+};