From 93210dd021ad4d534fd020895d7889d798af7b4e Mon Sep 17 00:00:00 2001
From: andig <andi@evcc.io>
Date: Sat, 7 Dec 2024 14:28:32 +0100
Subject: [PATCH] Add Nordpool tariff api (#17628)

---
 templates/definition/tariff/nordpool.yaml | 79 +++++++++++++++++++++++
 util/format.go                            |  1 +
 util/format_functions.go                  |  4 ++
 3 files changed, 84 insertions(+)
 create mode 100644 templates/definition/tariff/nordpool.yaml

diff --git a/templates/definition/tariff/nordpool.yaml b/templates/definition/tariff/nordpool.yaml
new file mode 100644
index 000000000..11fbfc0f4
--- /dev/null
+++ b/templates/definition/tariff/nordpool.yaml
@@ -0,0 +1,79 @@
+template: nordpool
+products:
+  - brand: Nordpool spot prices
+requirements:
+  description:
+    de: "Nordpool Spot Preise im Day-Ahead-Markt für alle Märkte in der Nordpool-Region."
+    en: "Nordpool spot prices in day-ahead market for all markets in the Nordpool region."
+  evcc: ["skiptest"]
+group: price
+params:
+  - name: region
+    example: GER
+    validvalues:
+      [
+        "EE",
+        "LT",
+        "LV",
+        "AT",
+        "BE",
+        "FR",
+        "GER",
+        "NL",
+        "PL",
+        "DK1",
+        "DK2",
+        "FI",
+        "NO1",
+        "NO2",
+        "NO3",
+        "NO4",
+        "NO5",
+        "SE1",
+        "SE2",
+        "SE3",
+        "SE4",
+        "TEL",
+        "SYS",
+      ]
+  - name: currency
+    default: EUR
+    validvalues: ["DKK", "EUR", "NOK", "PLN", "RON", "SEK"]
+  - preset: tariff-base
+render: |
+  type: custom
+  forecast:
+    source: go
+    script: |
+      // concat today and tomorrow
+      "[" + strings.Trim(strings.Trim(today, "[]") + "," + strings.Trim(tomorrow, "[]"), ",") + "]"
+    in:
+      - name: today
+        type: string
+        config:
+          source: http
+          uri: https://dataportal-api.nordpoolgroup.com/api/DayAheadPrices?market=DayAhead&date={{ `{{ now.Local | date "2006-01-02" }}` }}&deliveryArea={{ .region }}&currency={{ .currency }}
+          jq: |
+            .multiAreaEntries | [
+              .[] | 
+              {
+                "start": .deliveryStart,
+                "end":   .deliveryEnd,
+                "price": .entryPerArea.{{ .region }}
+              }
+            ] | tostring
+      - name: tomorrow
+        type: string
+        config:
+          source: http
+          uri: https://dataportal-api.nordpoolgroup.com/api/DayAheadPrices?market=DayAhead&date={{ `{{ addDate (now.Local) 0 0 1 | date "2006-01-02" }}` }}&deliveryArea={{ .region }}&currency={{ .currency }}
+          jq: |
+            .multiAreaEntries | [
+              .[] | 
+              {
+                "start": .deliveryStart,
+                "end":   .deliveryEnd,
+                "price": .entryPerArea.{{ .region }}
+              }
+            ] | tostring
+  {{ include "tariff-base" . }}
diff --git a/util/format.go b/util/format.go
index a825612f4..5adaec3b8 100644
--- a/util/format.go
+++ b/util/format.go
@@ -53,6 +53,7 @@ func ReplaceFormatted(s string, kv map[string]interface{}) (string, error) {
 		Funcs(sprig.TxtFuncMap()).
 		Funcs(map[string]any{
 			"timeRound": timeRound,
+			"addDate":   addDate,
 		}).Parse(s)
 	if err != nil {
 		return s, err
diff --git a/util/format_functions.go b/util/format_functions.go
index 2ba39ea2c..db7ed9eb9 100644
--- a/util/format_functions.go
+++ b/util/format_functions.go
@@ -12,3 +12,7 @@ func timeRound(d time.Duration, round string) time.Duration {
 		return d
 	}
 }
+
+func addDate(ts time.Time, y, m, d int) time.Time {
+	return ts.AddDate(y, m, d)
+}