Change default image_mode to proxy, remove deprecated option

config/defaults.hjson

@@ -42,11 +42,6 @@
     url: "http://localhost:8080/"
     # Set a custom pictrs API key. ( Required for deleting images )
     api_key: "string"
-    # Backwards compatibility with 0.18.1. False is equivalent to `image_mode: None`, true is
-    # equivalent to `image_mode: StoreLinkPreviews`.
-    # 
-    # To be removed in 0.20
-    cache_external_link_previews: true
     # Specifies how to handle remote images, so that users don't have to connect directly to remote
     # servers.
     image_mode: 

crates/api_common/src/request.rs

@@ -343,7 +343,7 @@ pub async fn delete_image_from_pictrs(
 async fn generate_pictrs_thumbnail(image_url: &Url, context: &LemmyContext) -> LemmyResult<Url> {
   let pictrs_config = context.settings().pictrs_config()?;
 
-  match pictrs_config.image_mode() {
+  match pictrs_config.image_mode {
     PictrsImageMode::None => return Ok(image_url.clone()),
     PictrsImageMode::ProxyAllImages => {
       return Ok(proxy_image_link(image_url.clone(), context).await?.into())

crates/api_common/src/utils.rs

@@ -1045,7 +1045,7 @@ pub async fn process_markdown(
 
   markdown_check_for_blocked_urls(&text, url_blocklist)?;
 
-  if context.settings().pictrs_config()?.image_mode() == PictrsImageMode::ProxyAllImages {
+  if context.settings().pictrs_config()?.image_mode == PictrsImageMode::ProxyAllImages {
     let (text, links) = markdown_rewrite_image_links(text);
     RemoteImage::create(&mut context.pool(), links.clone()).await?;
 
@@ -1115,7 +1115,7 @@ async fn proxy_image_link_internal(
 pub async fn proxy_image_link(link: Url, context: &LemmyContext) -> LemmyResult<DbUrl> {
   proxy_image_link_internal(
     link,
-    context.settings().pictrs_config()?.image_mode(),
+    context.settings().pictrs_config()?.image_mode,
     context,
   )
   .await

crates/utils/src/settings/mod.rs

@@ -7,7 +7,7 @@ use urlencoding::encode;
 
 pub mod structs;
 
-use structs::{DatabaseConnection, PictrsConfig, PictrsImageMode, Settings};
+use structs::{DatabaseConnection, PictrsConfig, Settings};
 
 static DEFAULT_CONFIG_FILE: &str = "config/config.hjson";
 
@@ -114,17 +114,3 @@ impl Settings {
       .ok_or_else(|| anyhow!("images_disabled").into())
   }
 }
-
-impl PictrsConfig {
-  pub fn image_mode(&self) -> PictrsImageMode {
-    if let Some(cache_external_link_previews) = self.cache_external_link_previews {
-      if cache_external_link_previews {
-        PictrsImageMode::StoreLinkPreviews
-      } else {
-        PictrsImageMode::None
-      }
-    } else {
-      self.image_mode.clone()
-    }
-  }
-}

crates/utils/src/settings/structs.rs

@@ -76,16 +76,10 @@ pub struct PictrsConfig {
   #[default(None)]
   pub api_key: Option<String>,
 
-  /// Backwards compatibility with 0.18.1. False is equivalent to `image_mode: None`, true is
-  /// equivalent to `image_mode: StoreLinkPreviews`.
-  ///
-  /// To be removed in 0.20
-  pub(super) cache_external_link_previews: Option<bool>,
-
   /// Specifies how to handle remote images, so that users don't have to connect directly to remote
   /// servers.
-  #[default(PictrsImageMode::StoreLinkPreviews)]
-  pub(super) image_mode: PictrsImageMode,
+  #[default(PictrsImageMode::ProxyAllImages)]
+  pub image_mode: PictrsImageMode,
 
   /// Timeout for uploading images to pictrs (in seconds)
   #[default(30)]
@@ -106,8 +100,7 @@ pub enum PictrsImageMode {
   /// ensures that they can be reliably retrieved and can be resized using pict-rs APIs. However
   /// it also increases storage usage.
   ///
-  /// This is the default behaviour, and also matches Lemmy 0.18.
-  #[default]
+  /// This behaviour matches Lemmy 0.18.
   StoreLinkPreviews,
   /// If enabled, all images from remote domains are rewritten to pass through
   /// `/api/v3/image_proxy`, including embedded images in markdown. Images are stored temporarily
@@ -116,6 +109,7 @@ pub enum PictrsImageMode {
   /// local server.
   ///
   /// Requires pict-rs 0.5
+  #[default]
   ProxyAllImages,
 }