updating definition of otherConfig in fdc3.chart to use an array of context objects

CHANGELOG.md

@@ -14,6 +14,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 * Updated definition of the `Instrument` context type to include optional market identifiers ([#819](https://github.com/finos/FDC3/pull/819))
 * Corrected API functions and object types to always use `string` instead of `String` ([#924](https://github.com/finos/FDC3/pull/924))
+* Updated definition of the `otherConfig` element of the `Chart` context type from an Object to an array of Contexts as this allows the `type` of each additional item of config to be examined before it is used ([#985](https://github.com/finos/FDC3/pull/985))
 
 ### Deprecated
 

docs/context/ref/Chart.md

@@ -21,7 +21,7 @@ In addition to handling requests to plot charts, a charting application may use
 
 ## Schema
 
-https://fdc3.finos.org/schemas/next/chart.schema.json
+[https://fdc3.finos.org/schemas/next/chart.schema.json](https://fdc3.finos.org/schemas/next/chart.schema.json)
 
 ## Details
 
@@ -31,9 +31,9 @@ https://fdc3.finos.org/schemas/next/chart.schema.json
 | `instruments`    | Instrument[]  | Yes      | <pre>[<br/>&emsp;&emsp;{<br/>&emsp;&emsp;&emsp;&emsp;"type": "fdc3.instrument",<br/>&emsp;&emsp;&emsp;&emsp;"id": {<br/>&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;"ticker": "AAPL"<br/>&emsp;&emsp;&emsp;&emsp;}<br/>&emsp;&emsp;},<br/>&emsp;&emsp;{<br/>&emsp;&emsp;&emsp;&emsp;"type": "fdc3.instrument",<br/>&emsp;&emsp;&emsp;&emsp;"id": {<br/>&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;"ticker": "MSFT"<br/>&emsp;&emsp;&emsp;&emsp;}<br/>&emsp;&emsp;}<br/>]</pre> |
 | `range` | TimeRange  | No       | <pre>{<br/>&emsp;&emsp;"type": "fdc3.timerange",<br/>&emsp;&emsp;"startTime": "2022-03-30T15:44:44+00:00",<br/>&emsp;&emsp;"endTime": "2022-04-30T23:59:59+00:00"<br/>}</pre>            |
 | `style`    | string  | No       | one of: `'line'`, `'bar'`, `'stacked-bar'`, `'mountain'`, `'candle'`, `'pie'`, `'scatter'`, `'histogram'`, `'heatmap'`, `'custom'`      |
-| `otherConfig`* | object  | No |  `{ /* unstandardized additional config */}`  |
+| `otherConfig`* | array  | No |  `[ {/* additional config context objects */} ]`  |
 
-\* It is common for charts to support other configuration, such as indicators, annotations etc., which do not have standarized formats, but may be included in the `otherConfig` element.
+\* It is common for charts to support other configuration, such as indicators, annotations etc., which do not have standardized formats, but may be included in the `otherConfig` array as context objects.
 
 ## Example
 
@@ -60,20 +60,24 @@ const chart = {
         endTime: "2020-10-31T08:00:00.000Z"
     },
     style: "line",
-    otherConfig: {
-        indicators: [
-            {
-                name: "ma",
-                parameters: {
-                    period: 14,
-                    type: "ema"
-                }
-            },
-            {
-                name: "volume"
+    otherConfig: [
+        {
+            type: "somevendor.someproduct.indicator",
+            name: "stddev",
+            parameters: {
+                period: 10,
+                matype: "exponential"
             }
-        ]
-    }
+        },
+        {
+            type: "someothervendor.someotherproduct.formula",
+            formula: "standard-deviation",
+            fields: {
+                lookback: 10,
+                type: "ema"
+            }
+        }
+    ]
 };
 
 fdc3.raiseIntent("ViewChart", chart);

src/context/ContextTypes.ts

@@ -24,7 +24,7 @@
 
 export interface Chart {
   instruments: InstrumentElement[];
-  otherConfig?: { [key: string]: any };
+  otherConfig?: OtherConfigElement[];
   range?: TimeRangeObject;
   style?: Style;
   type: string;
@@ -62,6 +62,13 @@ export interface PurpleMarket {
   [property: string]: any;
 }
 
+export interface OtherConfigElement {
+  id?: { [key: string]: any };
+  name?: string;
+  type: string;
+  [property: string]: any;
+}
+
 export interface TimeRangeObject {
   endTime?: Date;
   startTime?: Date;
@@ -600,7 +607,7 @@ const typeMap: any = {
   Chart: o(
     [
       { json: 'instruments', js: 'instruments', typ: a(r('InstrumentElement')) },
-      { json: 'otherConfig', js: 'otherConfig', typ: u(undefined, m('any')) },
+      { json: 'otherConfig', js: 'otherConfig', typ: u(undefined, a(r('OtherConfigElement'))) },
       { json: 'range', js: 'range', typ: u(undefined, r('TimeRangeObject')) },
       { json: 'style', js: 'style', typ: u(undefined, r('Style')) },
       { json: 'type', js: 'type', typ: '' },
@@ -641,6 +648,14 @@ const typeMap: any = {
     ],
     'any'
   ),
+  OtherConfigElement: o(
+    [
+      { json: 'id', js: 'id', typ: u(undefined, m('any')) },
+      { json: 'name', js: 'name', typ: u(undefined, '') },
+      { json: 'type', js: 'type', typ: '' },
+    ],
+    'any'
+  ),
   TimeRangeObject: o(
     [
       { json: 'endTime', js: 'endTime', typ: u(undefined, Date) },

src/context/schemas/chart.schema.json

@@ -20,7 +20,10 @@
       "enum": [	"line", "bar", "stacked-bar", "mountain", "candle", "pie", "scatter", "histogram", "heatmap", "custom"]
     },
     "otherConfig": {
-      "type": "object"
+      "type": "array",
+      "items": {
+        "$ref": "context.schema.json#"
+      }
     }
   },
   "required": ["instruments"]