feat: Site pages get listed.

frontmatter.odin

@@ -0,0 +1,75 @@
+package main
+
+import "core:encoding/json"
+import "core:fmt"
+import "core:strings"
+
+Frontmatter :: struct {
+	title:       string,
+	date:        string,
+	publishDate: string,
+	draft:       bool,
+	isStarred:   bool,
+	menu:        string,
+}
+
+// parse_frontmatter splits raw file content into a Frontmatter struct and the
+// remaining markdown body. The frontmatter is a JSON object delimited by { }
+// at the start of the file.
+parse_frontmatter :: proc(content: string) -> (fm: Frontmatter, body: string, ok: bool) {
+	body = content
+
+	if !strings.has_prefix(content, "{\n") {
+		return
+	}
+	end := strings.index(content, "\n}\n")
+	if end < 0 {
+		return
+	} else {
+		end += 2
+	}
+
+	json_str := content[:end + 1]
+	body = strings.trim_left(content[end + 1:], " \t\r\n")
+
+	value, err := json.parse_string(json_str, spec = .JSON)
+	if err != nil {
+		fmt.eprintfln("thor: failed to parse frontmatter JSON: %v", err)
+		return
+	}
+	defer json.destroy_value(value)
+
+	obj, ok2 := value.(json.Object)
+	if !ok2 {
+		return
+	}
+
+	fm.title = json_get_string(obj, "title")
+	fm.date = json_get_string(obj, "date")
+	fm.publishDate = json_get_string(obj, "publishDate")
+	fm.draft = json_get_bool(obj, "draft")
+	fm.isStarred = json_get_bool(obj, "isStarred")
+	fm.menu = json_get_string(obj, "menu")
+
+	ok = true
+	return
+}
+
+json_get_string :: proc(obj: json.Object, key: string) -> string {
+	if v, ok := obj[key]; ok {
+		if s, ok2 := v.(json.String); ok2 {
+			return strings.clone(s)
+		}
+	}
+	return ""
+}
+
+json_get_bool :: proc(obj: json.Object, key: string) -> bool {
+	if v, ok := obj[key]; ok {
+		if b, ok2 := v.(json.Boolean); ok2 {
+			return b
+		}
+	}
+	return false
+}
+