Bunch of stuff

plugins/core/core.plugin.json

@@ -21,13 +21,41 @@
       "invoke": "toggle_h2",
       "mac": "Cmd-2",
       "key": "Ctrl-2"
+    },
+    "Page: Delete": {
+      "invoke": "deletePage"
+    },
+    "Page: Rename": {
+      "invoke": "renamePage"
+    },
+    "Pages: Reindex": {
+      "invoke": "reindexPages"
+    },
+    "Pages: Back Links": {
+      "invoke": "showBackLinks"
     }
   },
   "events": {
     "page:click": ["taskToggle", "clickNavigate"],
-    "editor:complete": ["pageComplete"]
+    "editor:complete": ["pageComplete"],
+    "page:index": ["indexLinks"]
   },
   "functions": {
+    "indexLinks": {
+      "path": "./page.ts:indexLinks"
+    },
+    "deletePage": {
+      "path": "./page.ts:deletePage"
+    },
+    "showBackLinks": {
+      "path": "./page.ts:showBackLinks"
+    },
+    "renamePage": {
+      "path": "./page.ts:renamePage"
+    },
+    "reindexPages": {
+      "path": "./page.ts:reindex"
+    },
     "pageComplete": {
       "path": "./navigate.ts:pageComplete"
     },

plugins/core/page.ts

@@ -0,0 +1,104 @@
+import { IndexEvent } from "../../webapp/src/app_event.ts";
+import { pageLinkRegex } from "../../webapp/src/constant.ts";
+import { syscall } from "./lib/syscall.ts";
+
+const wikilinkRegex = new RegExp(pageLinkRegex, "g");
+
+export async function indexLinks({ name, text }: IndexEvent) {
+  console.log("Now indexing", name);
+  let backLinks: { key: string; value: string }[] = [];
+  for (let match of text.matchAll(wikilinkRegex)) {
+    let toPage = match[1];
+    let pos = match.index!;
+    backLinks.push({
+      key: `pl:${toPage}:${pos}`,
+      value: name,
+    });
+  }
+  console.log("Found", backLinks.length, "wiki link(s)");
+  await syscall("indexer.batchSet", name, backLinks);
+}
+
+export async function deletePage() {
+  let pageMeta = await syscall("editor.getCurrentPage");
+  console.log("Navigating to start page");
+  await syscall("editor.navigate", "start");
+  console.log("Deleting page from space");
+  await syscall("space.deletePage", pageMeta.name);
+  console.log("Reloading page list");
+  await syscall("space.reloadPageList");
+}
+
+export async function renamePage() {
+  const pageMeta = await syscall("editor.getCurrentPage");
+  const oldName = pageMeta.name;
+  const newName = await syscall("editor.prompt", `Rename ${oldName} to:`);
+  if (!newName) {
+    return;
+  }
+  console.log("New name", newName);
+
+  let pagesToUpdate = await getBackLinks(oldName);
+  console.log("All pages containing backlinks", pagesToUpdate);
+
+  let text = await syscall("editor.getText");
+  console.log("Writing new page to space");
+  await syscall("space.writePage", newName, text);
+  console.log("Deleting page from space");
+  await syscall("space.deletePage", oldName);
+  console.log("Reloading page list");
+  await syscall("space.reloadPageList");
+  console.log("Navigating to new page");
+  await syscall("editor.navigate", newName);
+
+  let pageToUpdateSet = new Set<string>();
+  for (let pageToUpdate of pagesToUpdate) {
+    pageToUpdateSet.add(pageToUpdate.page);
+  }
+
+  for (let pageToUpdate of pageToUpdateSet) {
+    console.log("Now going to update links in", pageToUpdate);
+    let { text } = await syscall("space.readPage", pageToUpdate);
+    if (!text) {
+      // Page likely does not exist, but at least we can skip it
+      continue;
+    }
+    let newText = text.replaceAll(`[[${oldName}]]`, `[[${newName}]]`);
+    if (text !== newText) {
+      console.log("Changes made, saving...");
+      await syscall("space.writePage", pageToUpdate, newText);
+    }
+  }
+}
+
+type BackLink = {
+  page: string;
+  pos: number;
+};
+
+async function getBackLinks(pageName: string): Promise<BackLink[]> {
+  let allBackLinks = await syscall(
+    "indexer.scanPrefixGlobal",
+    `pl:${pageName}:`
+  );
+  let pagesToUpdate: BackLink[] = [];
+  for (let { key, value } of allBackLinks) {
+    let keyParts = key.split(":");
+    pagesToUpdate.push({
+      page: value,
+      pos: +keyParts[keyParts.length - 1],
+    });
+  }
+  return pagesToUpdate;
+}
+
+export async function showBackLinks() {
+  const pageMeta = await syscall("editor.getCurrentPage");
+  let backLinks = await getBackLinks(pageMeta.name);
+
+  console.log("Backlinks", backLinks);
+}
+
+export async function reindex() {
+  await syscall("space.reindex");
+}