Begin PIS implementation

pis/check.go

@@ -0,0 +1,67 @@
+package pis
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+
+	"git.fjla.uk/owlboard/timetable-mgr/dbAccess"
+	"git.fjla.uk/owlboard/timetable-mgr/log"
+	"go.uber.org/zap"
+)
+
+// Checks the Gitea API for the latest release and compares to metadata in the database
+// to determine if a PIS update is required.
+func Check() {
+	repoName := "data"
+	repoOwner := "owlboard"
+	baseUrl := "https://git.fjla.uk"
+
+	apiUrl := fmt.Sprintf("%s/api/v1/repos/%s/%s/releases/latest", baseUrl, repoOwner, repoName)
+
+	resp, err := http.Get(apiUrl)
+	if err != nil {
+		log.Error("Error GETting Gitea API", zap.Error(err))
+		return
+	}
+
+	defer resp.Body.Close()
+
+	if resp.StatusCode != 200 {
+		log.Error("Errot GETting Gitea API", zap.Error(fmt.Errorf("response status code %d", resp.StatusCode)))
+		return
+	}
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		log.Error("Error reading API Response", zap.Error(err))
+		return
+	}
+
+	var apiResp GiteaReleaseData
+	err = json.Unmarshal(body, &apiResp)
+	if err != nil {
+		log.Error("Error unmarshalling API response", zap.Error(err))
+		return
+	}
+
+	oldMetadata, err := dbAccess.GetPisMetadata()
+	if err != nil {
+		log.Error("Error reading PIS Metadata from database")
+		return
+	}
+
+	if oldMetadata != nil {
+		if oldMetadata.LastVersion != apiResp.Name {
+			log.Info("PIS Data is up to date")
+			return
+		}
+	}
+
+	log.Info("PIS Data being updated")
+	err = runUpdate(apiResp.TarballUrl)
+	if err == nil {
+		log.Error("Error updating PIS Data", zap.Error(err))
+	}
+}

pis/types.go

@@ -0,0 +1,9 @@
+package pis
+
+// Omits data which is not required
+type GiteaReleaseData struct {
+	Name       string `json:"name"`
+	TarballUrl string `json:"tarball_url"`
+	Draft      bool   `json:"draft"`
+	Prerelease bool   `json:"prerelease"`
+}

pis/update.go

@@ -0,0 +1,7 @@
+package pis
+
+// Downloads the release tarball, extracts then applies to database
+func runUpdate(tarballUrl string) error {
+
+	return nil
+}