Only show explore tab for surface-weather-observation/synop (#74)

Fix link detection for OAFeat and OARec

Records with observations, display button for "explore observations", "OAFeat observation collection", and "OARec discovery metadata". Records without observations, display button for "OARec discovery metadata"

src/views/Datasets.vue

@@ -9,14 +9,21 @@
  <v-col sm="12" md="3">
  <v-container>
  <v-row justify="center" fill-height>
- <v-card class="pa-0 ma-0" @click="loadMap(item.id)">
- <v-overlay open-on-hover contained activator="parent" class="align-center justify-center">
- <v-btn flat>
- {{ $t("datasets.map") }}
- </v-btn>
- </v-overlay>
- <dataset-map :dataset="item" />
- </v-card>
+ <template v-if="item.hasObs">
+ <v-card class="pa-0 ma-0" @click="loadMap(item.id)">
+ <v-overlay open-on-hover contained activator="parent" class="align-center justify-center">
+ <v-btn flat>
+ {{ $t("datasets.map") }}
+ </v-btn>
+ </v-overlay>
+ <dataset-map :dataset="item" />
+ </v-card>
+ </template>
+ <template v-else>
+ <v-card class="pa-0 ma-0">
+ <dataset-map :dataset="item" />
+ </v-card>
+ </template>
  </v-row>
  </v-container>
  </v-col>
@@ -107,25 +114,27 @@ export default {
  .then(function (response) {
  // handle success
  for (var c of response.data.features) {
- const links = [
- {
+ const links = [];
+ c.hasObs = c.properties["wmo:topicHierarchy"].includes("surface-based-observations/synop");
+ if (c.hasObs) {
+ links.push({
  href: undefined,
  target: `/${c.id}`,
  type: "Map",
  msg: "explore",
  icon: "mdi-map-marker-circle",
- },
- ];
+ })
+ }
  for (var link of c.links) {
- if (link.type === "OARec") {
+ if (link.rel === "canonical") {
  links.push({
  href: link.href,
  target: undefined,
  type: "OARec",
  msg: "oarec",
  icon: "mdi-open-in-new",
  });
- } else if (link.type === "OAFeat") {
+ } else if (link.rel === "collection" && c.hasObs) {
  links.push({
  href: link.href,
  target: undefined,