solar-toolkit/gateway/handler/handler.go

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package handler
import (
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"encoding/json"
"io"
"log"
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"net/http"
"git.netflux.io/rob/solar-toolkit/inverter"
)
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const timestampMinimumYear = 2022
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type Store interface {
InsertETRuntimeData(*inverter.ETRuntimeData) error
}
type Handler struct {
store Store
}
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func New(store Store) *Handler { return &Handler{store: store} }
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func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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if r.Method != http.MethodPost {
http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
return
}
if r.URL.Path != "/gateway/et_runtime_data" {
http.Error(w, "endpoint not found", http.StatusNotFound)
return
}
body, err := io.ReadAll(r.Body)
if err != nil {
log.Printf("could not read body: %v", err)
http.Error(w, "unexpected error", http.StatusInternalServerError)
return
}
var runtimeData inverter.ETRuntimeData
err = json.Unmarshal(body, &runtimeData)
if err != nil {
log.Printf("could not unmarshal body: %v", err)
http.Error(w, "unexpected error", http.StatusInternalServerError)
return
}
if runtimeData.Timestamp.Year() < timestampMinimumYear {
log.Printf("invalid timestamp: %v", runtimeData.Timestamp)
http.Error(w, "invalid data", http.StatusBadRequest)
return
}
if err = h.store.InsertETRuntimeData(&runtimeData); err != nil {
log.Printf("error storing data: %v", err)
http.Error(w, "unexpected error", http.StatusInternalServerError)
return
}
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w.Header().Set("content-type", "application/json")
w.WriteHeader(http.StatusOK)
w.Write([]byte("OK\n"))
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}