Add update_here so updates are atomic at the zome level

Author: zippy

dna/zomes/where/src/here.rs

@@ -19,7 +19,6 @@ pub struct Here {
 }
 
 
-/// Input to the create channel call
 #[derive(Debug, Serialize, Deserialize, SerializedBytes)]
 #[serde(rename_all = "camelCase")]
 pub struct AddHereInput {
@@ -29,6 +28,14 @@ pub struct AddHereInput {
     pub meta: BTreeMap<String, String>,
 }
 
+/// Input to update a Here
+#[derive(Debug, Serialize, Deserialize, SerializedBytes)]
+#[serde(rename_all = "camelCase")]
+pub struct UpdateHereInput {
+    old_here_hh: HeaderHashB64,
+    new_here: AddHereInput,
+}
+
 #[hdk_extern]
 fn add_here(input: AddHereInput) -> ExternResult<HeaderHashB64> {
     // Find session
@@ -46,6 +53,12 @@ fn add_here(input: AddHereInput) -> ExternResult<HeaderHashB64> {
     Ok(link_hh.into())
 }
 
+#[hdk_extern]
+fn update_here(input: UpdateHereInput) -> ExternResult<HeaderHashB64> {
+    delete_here(input.old_here_hh)?;
+    add_here(input.new_here)
+}
+
 #[hdk_extern]
 fn delete_here(link_hh: HeaderHashB64) -> ExternResult<()> {
     delete_link(link_hh.into())?;

ui/lib/src/where.service.ts

@@ -133,6 +133,12 @@ export class WhereService {
     return this.callZome('add_here', input);
   }
 
+  async updateLocation(hereHh: HeaderHashB64, location: Location, spaceEh: EntryHashB64, sessionIndex: number): Promise<HeaderHashB64> {
+    const entry = this.hereFromLocation(location);
+    const input = {oldHereHh: hereHh, newHere: {spaceEh, sessionIndex, value: entry.value, meta: entry.meta}}
+    return this.callZome('update_here', input);
+  }
+
   async deleteLocation(hereHh: HeaderHashB64): Promise<EntryHashB64> {
     return this.callZome('delete_here', hereHh);
   }