From 5d7e0a0db279a787efaff1154daf522b56a2fb07 Mon Sep 17 00:00:00 2001
From: Tim Green <iamtimgreen@gmail.com>
Date: Tue, 22 Nov 2022 23:29:50 +1100
Subject: [PATCH] feat(parser): support global tags in frontmatter.

---
 packages/core/src/model.ts                  |  1 +
 packages/core/src/parser.ts                 | 11 +++++--
 packages/core/test/fixtures/parser/tags.md  | 21 +++++++++++++
 packages/core/test/fixtures/parser/tags.yml | 35 +++++++++++++++++++++
 4 files changed, 65 insertions(+), 3 deletions(-)
 create mode 100644 packages/core/test/fixtures/parser/tags.md
 create mode 100644 packages/core/test/fixtures/parser/tags.yml

diff --git a/packages/core/src/model.ts b/packages/core/src/model.ts
index 28c7342..9d3c367 100644
--- a/packages/core/src/model.ts
+++ b/packages/core/src/model.ts
@@ -13,6 +13,7 @@ export interface NoteModel {
 export interface IFrontmatterConfig {
   deckName?: string;
   models?: Record<ModelName, NoteModel>;
+  tags?: string[];
 }
 
 export interface IDeck {
diff --git a/packages/core/src/parser.ts b/packages/core/src/parser.ts
index fd39701..379c9a5 100644
--- a/packages/core/src/parser.ts
+++ b/packages/core/src/parser.ts
@@ -14,12 +14,12 @@ import YAML from "yaml";
 
 import { rehypeAnkiMathjax } from "./lib/rehype-anki-mathjax";
 import { remarkTagLink, TagLink } from "./lib/remark-tag-link";
-import { INotePosition } from "./model";
 import {
   BASIC_MODEL,
   IDeck,
   IFrontmatterConfig,
   INote,
+  INotePosition,
   MediaInfo,
   MediaName,
 } from "./model";
@@ -169,6 +169,7 @@ export class Parser {
 
   private async toNote(
     nodes: Array<Content>,
+    frontmatterConfig?: IFrontmatterConfig,
     dirpath?: string,
   ): Promise<INote | undefined> {
     const heading = nodes[0] as Heading;
@@ -182,7 +183,9 @@ export class Parser {
     }
 
     const cardTag = headingTags[0]!!;
-    const tags = headingTags.slice(1);
+    const localTags = headingTags.slice(1);
+    const globalTags = frontmatterConfig?.tags || [];
+    const tags = Array.from(new Set(localTags.concat(globalTags)));
     if (
       !Parser.isBasicCardTag(cardTag) &&
       !Parser.extractCustomModelName(cardTag)
@@ -301,7 +304,9 @@ export class Parser {
     );
 
     const notes = (
-      await Promise.all(noteMds.map((it) => this.toNote(it, dirpath)))
+      await Promise.all(
+        noteMds.map((it) => this.toNote(it, frontmatterConfig, dirpath)),
+      )
     ).filter((n) => !!n) as Array<INote>;
 
     return {
diff --git a/packages/core/test/fixtures/parser/tags.md b/packages/core/test/fixtures/parser/tags.md
new file mode 100644
index 0000000..2d1282f
--- /dev/null
+++ b/packages/core/test/fixtures/parser/tags.md
@@ -0,0 +1,21 @@
+---
+tags:
+  - global-tag-1
+  - global-tag-2
+---
+
+# Ignored
+
+ignored
+
+# Note 1 #card #local-tag-1
+
+n1 text
+
+## n1 h2
+
+n1 text
+
+# #card Note 2 #local-tag-2
+
+## n2 h2
diff --git a/packages/core/test/fixtures/parser/tags.yml b/packages/core/test/fixtures/parser/tags.yml
new file mode 100644
index 0000000..3f5e62d
--- /dev/null
+++ b/packages/core/test/fixtures/parser/tags.yml
@@ -0,0 +1,35 @@
+deckName: Default
+frontmatterConfig:
+  tags:
+    - global-tag-1
+    - global-tag-2
+notes:
+  - modelName: Basic
+    inOrderFields: [Front, Back]
+    values:
+      Front: "Note 1 \n "
+      Back: |-
+        <p>n1 text</p>
+        <h2>n1 h2</h2>
+        <p>n1 text</p>
+    tags:
+      - local-tag-1
+      - global-tag-1
+      - global-tag-2
+    medias: {}
+    position:
+      startLine: 11
+      endLine: 17
+  - modelName: Basic
+    inOrderFields: [Front, Back]
+    values:
+      Front: " Note 2 "
+      Back: <h2>n2 h2</h2>
+    tags:
+      - local-tag-2
+      - global-tag-1
+      - global-tag-2
+    medias: {}
+    position:
+      startLine: 19
+      endLine: 21