From d9b278061ff37f08bfa8556d869c4cb63e898b28 Mon Sep 17 00:00:00 2001
From: qwerzl <me@qwerzl.me>
Date: Wed, 6 Mar 2024 21:25:25 +0800
Subject: [PATCH] feat: warn when font weights are not available

---
 src/providers/bunny.ts     | 4 ++++
 src/providers/fontshare.ts | 1 +
 src/providers/google.ts    | 9 +++++++++
 3 files changed, 14 insertions(+)

diff --git a/src/providers/bunny.ts b/src/providers/bunny.ts
index 39b941e..cc1cd89 100644
--- a/src/providers/bunny.ts
+++ b/src/providers/bunny.ts
@@ -65,6 +65,10 @@ async function getFontDetails (family: string, variants: ResolveFontFacesOptions
   const id = familyMap.get(family) as keyof typeof fonts
   const font = fonts[id]!
   const weights = variants.weights.filter(weight => font.weights.includes(Number(weight)))
+  if (weights.length == 0)
+    throw "No available font weights."
+  else if (variants.weights.length !== weights.length)
+    logger.warn(`Font weights \`${variants.weights}\` are not entirely available for \`${family}\` from \`bunny\`.`)
   const styleMap = {
     italic: 'i',
     oblique: 'i',
diff --git a/src/providers/fontshare.ts b/src/providers/fontshare.ts
index 395f986..334007f 100644
--- a/src/providers/fontshare.ts
+++ b/src/providers/fontshare.ts
@@ -103,6 +103,7 @@ async function getFontDetails (family: string, variants: ResolveFontFacesOptions
     numbers.push(style.weight.number)
   }
 
+  if (numbers.length == 0) throw "No available font weights."
   const css = await fontAPI(`/css?f[]=${font.slug + '@' + numbers.join(',')}`)
 
   // TODO: support subsets and axes
diff --git a/src/providers/google.ts b/src/providers/google.ts
index c1c8268..dea2bb0 100644
--- a/src/providers/google.ts
+++ b/src/providers/google.ts
@@ -76,6 +76,15 @@ async function getFontDetails (family: string, variants: ResolveFontFacesOptions
   const weights = variableWeight
     ? [`${variableWeight.min}..${variableWeight.max}`]
     : variants.weights.filter(weight => String(weight) in font.fonts)
+
+  if (weights.length == 0)
+    throw "No available font weights."
+  else if (
+    (variableWeight && !(variants.weights.every(weight => Number(weight) >= variableWeight.min && Number(weight) <= variableWeight.max))) ||
+    (!variableWeight && variants.weights.length !== weights.length)
+  )
+    logger.warn(`Font weights \`${variants.weights}\` are not entirely available for \`${family}\` from \`google\`.`)
+
   const resolvedVariants = weights.flatMap(w => [...styles].map(s => `${s},${w}`)).sort()
 
   let css = ''