feature: getEditorMetadata helper (#1789)

* feature: `getEditorMetadata` helper
* add documentation
* remove unused `throttle` reference

Author: shockey

docs/helpers.md

@@ -0,0 +1,22 @@
+### `getEditorMetadata`
+
+`getEditorMetadata` is a method that allows you to get information about the Editor's state without reaching directly into the plugin system.
+
+Example:
+
+```js
+const editor = SwaggerEditor({ /* your configuration here */ })
+
+SwaggerEditor.getEditorMetadata()
+```
+
+Result:
+
+```js
+{
+  contentString: String,
+  contentObject: Object,
+  isValid: Boolean,
+  errors: Array,
+}
+```

src/plugins/editor-metadata/index.js

@@ -0,0 +1,15 @@
+export default function(system) {
+  return {
+    rootInjects: {
+      getEditorMetadata() {
+        const allErrors = system.errSelectors.allErrors()
+        return {
+          contentString: system.specSelectors.specStr(),
+          contentObject: system.specSelectors.specJson().toJS(),
+          isValid: allErrors.size === 0,
+          errors: allErrors.toJS()
+        }
+      }
+    }
+  }
+}

test/plugins/editor-metadata/index.js

@@ -0,0 +1,163 @@
+import expect from "expect"
+import SwaggerUi from "swagger-ui"
+import EditorMetadataPlugin from "plugins/editor-metadata"
+
+function getSystem(spec) {
+  return new Promise((resolve) => {
+    const system = SwaggerUi({
+      spec,
+      domNode: null,
+      presets: [
+        SwaggerUi.plugins.SpecIndex,
+        SwaggerUi.plugins.ErrIndex,
+        SwaggerUi.plugins.DownloadUrl,
+        SwaggerUi.plugins.SwaggerJsIndex,
+      ],
+      initialState: {
+        layout: undefined
+      },
+      plugins: [
+        EditorMetadataPlugin,
+        () => ({
+          statePlugins: {
+            configs: {
+              actions: {
+                loaded: () => {
+                  return {
+                    type: "noop"
+                  }
+                }
+              }
+            }
+          }
+        })
+      ]
+    })
+    
+    resolve(system)
+  })
+}
+
+describe("editor metadata plugin", function() {
+  this.timeout(10 * 1000)
+
+  it("should provide a `getEditorMetadata` method", async () => {
+    const spec = {}
+
+    const system = await getSystem(spec)
+
+    expect(system.getEditorMetadata).toBeA(Function)
+  })
+
+  it("should return JS object spec content from the `getEditorMetadata` method", async () => {
+    const spec = {
+      swagger: "2.0",
+      paths: {
+        "/": {
+          get: {
+            description: "hello there!",
+            responses: {
+              "200": {
+                description: "ok"
+              }
+            }
+          }
+        }
+      }
+    }
+
+    const system = await getSystem(spec)
+
+    expect(system.getEditorMetadata().contentString).toEqual(`{"swagger":"2.0","paths":{"/":{"get":{"description":"hello there!","responses":{"200":{"description":"ok"}}}}}}`)
+    expect(system.getEditorMetadata().contentObject).toEqual(spec)
+  })
+
+
+  it("should return YAML string spec content from the `getEditorMetadata` method", async () => {
+    const spec = `---
+    swagger: '2.0'
+    paths:
+      "/":
+        get:
+          description: hello there!
+          responses:
+            '200':
+              description: ok`
+
+    const system = await getSystem()
+
+    system.specActions.updateSpec(spec)
+
+    expect(system.getEditorMetadata().contentString).toEqual(spec)
+    expect(system.getEditorMetadata().contentObject).toEqual({
+      swagger: "2.0",
+      paths: {
+        "/": {
+          get: {
+            description: "hello there!",
+            responses: {
+              "200": {
+                description: "ok"
+              }
+            }
+          }
+        }
+      }
+    })
+  })
+  
+  it("should return isValid for a valid spec", async () => {
+    const spec = {
+      swagger: "2.0",
+      paths: {
+        "/": {
+          get: {
+            description: "hello there!",
+            responses: {
+              "200": {
+                description: "ok"
+              }
+            }
+          }
+        }
+      }
+    }
+
+    const system = await getSystem(spec)
+
+    expect(system.getEditorMetadata().isValid).toBeA("boolean")
+    expect(system.getEditorMetadata().isValid).toBe(true)
+  })
+
+    
+  it("should return isValid for an invalid spec", async () => {
+    const spec = {
+      swagger: "2.0",
+      paths: {
+        "/": {
+          get: {
+            description: "hello there!",
+            responses: {
+              "200": {
+                description: "ok"
+              }
+            }
+          }
+        }
+      }
+    }
+
+    const err = {
+      type: "spec",
+      message: "it's broken!"
+    }
+
+    const system = await getSystem(spec)
+
+    system.errActions.newSpecErr(err)
+
+    expect(system.getEditorMetadata().isValid).toBeA("boolean")
+    expect(system.getEditorMetadata().isValid).toBe(false)
+    expect(system.getEditorMetadata().errors).toEqual([err])
+  })
+})