lib

encode.rs (6230B)

---

 #[cfg(not(feature = "std"))]
 use alloc::{
     format,
     string::{String, ToString},
     vec,
     vec::Vec,
 };
 
 use radroots_event::{
     farm::crdt::FarmCrdtDocumentKind,
     farm::file::{FarmFileDimensions, FarmFileMetadata, FarmFileSource, KIND_FARM_FILE_METADATA},
     farm::workspace::KIND_FARM_WORKSPACE_MANIFEST,
     tag::name::{TAG_A, TAG_D, TAG_H, TAG_MIME, TAG_ORIGINAL_SHA256, TAG_SHA256, TAG_URL},
 };
 
 use crate::d_tag::validate_d_tag;
 use crate::error::EventEncodeError;
 use crate::field_helpers::{
     push_optional_tag, push_tag, push_tag_values, validate_lowercase_hex_64,
     validate_non_empty_field,
 };
 use radroots_event::wire::Nip01EventWireParts;
 
 const TAG_ALT: &str = "alt";
 const TAG_BLURHASH: &str = "blurhash";
 const TAG_DIMENSIONS: &str = "dim";
 const TAG_FALLBACK: &str = "fallback";
 const TAG_IMAGE: &str = "image";
 const TAG_OWNER_DOCUMENT: &str = "radroots:owner_document";
 const TAG_SIZE: &str = "size";
 const TAG_THUMB: &str = "thumb";
 
 pub fn farm_file_metadata_build_tags(
     metadata: &FarmFileMetadata,
 ) -> Result<Vec<Vec<String>>, EventEncodeError> {
     validate_metadata(metadata)?;
     let workspace = format!(
         "{KIND_FARM_WORKSPACE_MANIFEST}:{}:{}",
         metadata.workspace.pubkey, metadata.workspace.d_tag
     );
     let mut tags = Vec::new();
     push_tag(&mut tags, TAG_D, metadata.d_tag.as_str());
     push_tag(&mut tags, TAG_H, metadata.farm_group_id.as_str());
     push_tag(&mut tags, TAG_A, workspace);
     push_tag(&mut tags, TAG_URL, metadata.url.as_str());
     push_tag(&mut tags, TAG_MIME, metadata.mime_type.as_str());
     push_tag(&mut tags, TAG_SHA256, metadata.sha256.as_str());
     push_tag_values(
         &mut tags,
         TAG_OWNER_DOCUMENT,
         vec![
             metadata.owner_document_id.clone(),
             document_kind_tag(&metadata.owner_document_kind),
         ],
     );
     push_optional_tag(
         &mut tags,
         TAG_ORIGINAL_SHA256,
         metadata.original_sha256.as_deref(),
     );
     if let Some(size) = metadata.size_bytes {
         push_tag(&mut tags, TAG_SIZE, size.to_string());
     }
     if let Some(dimensions) = metadata.dimensions {
         push_tag(&mut tags, TAG_DIMENSIONS, dimensions_tag(dimensions));
     }
     push_optional_tag(&mut tags, TAG_BLURHASH, metadata.blurhash.as_deref());
     push_source_tag(&mut tags, TAG_THUMB, metadata.thumb.as_ref())?;
     push_source_tag(&mut tags, TAG_IMAGE, metadata.image.as_ref())?;
     push_optional_tag(&mut tags, TAG_ALT, metadata.alt.as_deref());
     for fallback in &metadata.fallbacks {
         validate_non_empty_field(fallback, "fallbacks")?;
         push_tag(&mut tags, TAG_FALLBACK, fallback.clone());
     }
     Ok(tags)
 }
 
 pub fn to_wire_parts(metadata: &FarmFileMetadata) -> Result<Nip01EventWireParts, EventEncodeError> {
     to_wire_parts_with_kind(metadata, KIND_FARM_FILE_METADATA)
 }
 
 pub fn to_wire_parts_with_kind(
     metadata: &FarmFileMetadata,
     kind: u32,
 ) -> Result<Nip01EventWireParts, EventEncodeError> {
     if kind != KIND_FARM_FILE_METADATA {
         return Err(EventEncodeError::InvalidKind(kind));
     }
     let tags = farm_file_metadata_build_tags(metadata)?;
     Ok(Nip01EventWireParts {
         kind,
         content: metadata.caption.clone().unwrap_or_default(),
         tags,
     })
 }
 
 pub(crate) fn validate_metadata(metadata: &FarmFileMetadata) -> Result<(), EventEncodeError> {
     validate_d_tag(&metadata.d_tag, "d_tag")?;
     validate_non_empty_field(&metadata.farm_group_id, "farm_group_id")?;
     validate_non_empty_field(&metadata.workspace.pubkey, "workspace.pubkey")?;
     validate_d_tag(&metadata.workspace.d_tag, "workspace.d_tag")?;
     validate_d_tag(&metadata.owner_document_id, "owner_document_id")?;
     validate_non_empty_field(&metadata.url, "url")?;
     validate_non_empty_field(&metadata.mime_type, "mime_type")?;
     validate_lowercase_hex_64(&metadata.sha256, "sha256")?;
     if let Some(hash) = metadata.original_sha256.as_deref() {
         validate_lowercase_hex_64(hash, "original_sha256")?;
     }
     if let Some(caption) = metadata.caption.as_deref() {
         validate_non_empty_field(caption, "caption")?;
     }
     if let Some(dimensions) = metadata.dimensions {
         validate_dimensions(dimensions, "dimensions")?;
     }
     if let Some(blurhash) = metadata.blurhash.as_deref() {
         validate_non_empty_field(blurhash, "blurhash")?;
     }
     validate_source(metadata.thumb.as_ref(), "thumb")?;
     validate_source(metadata.image.as_ref(), "image")?;
     if let Some(alt) = metadata.alt.as_deref() {
         validate_non_empty_field(alt, "alt")?;
     }
     for fallback in &metadata.fallbacks {
         validate_non_empty_field(fallback, "fallbacks")?;
     }
     Ok(())
 }
 
 pub(crate) fn document_kind_tag(kind: &FarmCrdtDocumentKind) -> String {
     kind.as_str().to_string()
 }
 
 fn validate_dimensions(
     dimensions: FarmFileDimensions,
     field: &'static str,
 ) -> Result<(), EventEncodeError> {
     if dimensions.w == 0 || dimensions.h == 0 {
         Err(EventEncodeError::InvalidField(field))
     } else {
         Ok(())
     }
 }
 
 fn validate_source(
     source: Option<&FarmFileSource>,
     field: &'static str,
 ) -> Result<(), EventEncodeError> {
     let Some(source) = source else {
         return Ok(());
     };
     validate_non_empty_field(&source.url, field)?;
     if let Some(mime_type) = source.mime_type.as_deref() {
         validate_non_empty_field(mime_type, field)?;
     }
     if let Some(dimensions) = source.dimensions {
         validate_dimensions(dimensions, field)?;
     }
     Ok(())
 }
 
 fn push_source_tag(
     tags: &mut Vec<Vec<String>>,
     key: &'static str,
     source: Option<&FarmFileSource>,
 ) -> Result<(), EventEncodeError> {
     let Some(source) = source else {
         return Ok(());
     };
     validate_source(Some(source), key)?;
     let mut values = vec![source.url.clone()];
     if let Some(mime_type) = source.mime_type.as_deref() {
         values.push(mime_type.to_string());
     }
     if let Some(dimensions) = source.dimensions {
         values.push(dimensions_tag(dimensions));
     }
     push_tag_values(tags, key, values);
     Ok(())
 }
 
 fn dimensions_tag(dimensions: FarmFileDimensions) -> String {
     format!("{}x{}", dimensions.w, dimensions.h)
 }