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Merge pull request #461 from MareStare/feat/add-more-docs-to-local-autocomplete

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Add more docs to the local autocomplete binary layout
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liamwhite 2025-03-17 18:15:23 -04:00 • committed by GitHub
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1 changed files with 35 additions and 11 deletions
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46
lib/philomena/autocomplete/generator.ex
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@ -5,32 +5,56 @@ defmodule Philomena.Autocomplete.Generator do
See assets/js/utils/local-autocompleter.ts for how this should be used. See assets/js/utils/local-autocompleter.ts for how this should be used.
The file follows the following binary format: The file follows the following binary format:
// Note that all pointer types (`struct T*`) are all relative to the binary payload start.
// Variable-length struct.
struct tag { struct tag {
uint8_t key_length; // Full name of the tag in UTF8.
uint8_t key[]; uint8_t name_length;
uint8_t association_length; uint8_t name[];
// List of IDs of other tags that appear on the same images in >50% of cases
uint8_t associations_length;
uint32_t associations[]; uint32_t associations[];
}; };
// Fixed-length struct.
struct tag_reference { struct tag_reference {
uint32_t tag_location; // 32 bit pointer to a tag in the `tags` array
union { struct tag* tag;
int32_t raw;
uint32_t num_uses; ///< when positive // If >=0 then this tag is canonical and the `meta` is the number of images with this tag
uint32_t alias_index; ///< when negative, -alias_index - 1 //
}; // If <0 then `-meta - 1` (to allow 0 as a possibility for the target) will give the index
// of a `tag_reference` for the canonical tag aliased by this one
// in the `primary_references` array
int32_t meta;
}; };
// Fixed-length struct.
struct secondary_reference { struct secondary_reference {
uint32_t primary_location; // Index of the `tag_reference` in the `primary_references` array
uint32_t primary_reference_index;
}; };
// Variable-length struct.
struct autocomplete_file { struct autocomplete_file {
// Array of variable-length structs, so any references to the items in
// this array must be direct pointers instead of item indexes.
struct tag tags[]; struct tag tags[];
// List of canonical/alias tags references with their respective metadata
struct tag_reference primary_references[]; struct tag_reference primary_references[];
// List of references to tags sorted by tag name discarding the namespace
struct secondary_reference secondary_references[]; struct secondary_reference secondary_references[];
uint32_t format_version; uint32_t format_version;
uint32_t reference_start;
// 32 bit pointer to the `primary_references` array start
struct tag_reference* primary_references_start;
// Length of the `tags` array.
uint32_t num_tags; uint32_t num_tags;
}; };