Merge pull request #580 from ralphocdol/unique-array-custom-api

added unique to filter arrays with unique items in custom-api

Author: svilenmarkov

Diff for: docs/custom-api.md

@@ -397,6 +397,7 @@ The following helper functions provided by Glance are available:
 - `sortByFloat(key string, order string, arr []JSON): []JSON`: Sorts an array of JSON objects by a float key in either ascending or descending order.
 - `sortByTime(key string, layout string, order string, arr []JSON): []JSON`: Sorts an array of JSON objects by a time key in either ascending or descending order. The format must be provided in Go's [date format](https://pkg.go.dev/time#pkg-constants).
 - `concat(strings ...string) string`: Concatenates multiple strings together.
+- `unique(key string, arr []JSON) []JSON`: Returns a unique array of JSON objects based on the given key.
 
 The following helper functions provided by Go's `text/template` are available:
 

Diff for: internal/glance/cli.go

@@ -91,7 +91,6 @@ func cliSensorsPrint() int {
 				fmt.Printf(" - %v\n", w)
 			}
 		}
-
 		return 1
 	}
 

Diff for: internal/glance/widget-custom-api.go

@@ -547,6 +547,18 @@ var customAPITemplateFuncs = func() template.FuncMap {
 		"concat": func(items ...string) string {
 			return strings.Join(items, "")
 		},
+		"unique": func(key string, results []decoratedGJSONResult) []decoratedGJSONResult {
+			seen := make(map[string]struct{})
+			out := make([]decoratedGJSONResult, 0, len(results))
+			for _, result := range results {
+				val := result.String(key)
+				if _, ok := seen[val]; !ok {
+					seen[val] = struct{}{}
+					out = append(out, result)
+				}
+			}
+			return out
+		},
 	}
 
 	for key, value := range globalTemplateFunctions {