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generating markup success

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This commit is contained in:
Michal Vanko 2024-09-03 23:15:55 +02:00
parent 41017e7459
commit f1b3400e63
1 changed files with 86 additions and 33 deletions
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119
axum_server/src/picture_generator/picture_markup_generator.rs
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@ -26,12 +26,21 @@ impl ExportFormat {
ExportFormat::PNG => "png",
}
}
pub fn get_type(&self) -> &str {
match self {
ExportFormat::JPG => "image/jpeg",
ExportFormat::AVIF => "image/avif",
ExportFormat::SVG => "image/svg+xml",
ExportFormat::PNG => "image/png",
}
}
}
pub fn generate_picture_markup(
orig_img_path: &str,
width: u32,
height: u32,
alt_text: &str,
) -> Result<String, anyhow::Error> {
let exported_formats = get_export_formats(orig_img_path);
let path_to_generated = get_generated_file_name(orig_img_path);
@ -39,17 +48,53 @@ pub fn generate_picture_markup(
let orig_img_dimensions = orig_img.dimensions();
let resolutions = get_resolutions(orig_img_dimensions, width, height);
let source_tags = exported_formats.iter().map(|format| {
let srcset = generate_srcset(&path_to_generated, format, &resolutions);
});
let source_tags = exported_formats
.iter()
.map(|format| {
let srcset = generate_srcset(&path_to_generated, format, &resolutions);
let format_type = format.get_type();
format!(
r#"<source
srcset="{srcset}"
type="{format_type}"
>"#
)
})
.collect::<Vec<String>>()
.join("\n");
let mut result = String::from("<picture>");
let image_path = get_image_path(
&path_to_generated,
resolutions.first().expect("Should this error ever happen?"),
exported_formats.last().expect("Can this one ever happen?"),
);
let image_tag = format!(
r#"<img
src="{image_path}"
width="{width}"
height="{height}"
alt="{alt_text}"
>"#
);
result.push_str("</picture>");
let result = format!(
r#"<picture>
{source_tags}
{image_tag}
</picture>"#
);
Ok(result)
}
fn get_image_path(path: &Path, resolution: &(u32, u32, f32), format: &ExportFormat) -> String {
let path_name = path.to_str().expect("Image has to have a valid path");
let (width, height, _) = resolution;
let extension = format.get_extension();
format!("{path_name}_{width}x{height}.{extension}")
}
fn get_resolutions(
(orig_width, orig_height): (u32, u32),
width: u32,
@ -151,13 +196,28 @@ fn test_get_max_resolution() {
);
}
fn strip_prefixes(path: &Path) -> &Path {
// Loop to remove all leading "../" components
let mut parent_path = path
.parent()
.expect("there should be a parent route to an image");
while let Ok(stripped) = parent_path
.strip_prefix("..")
.or(parent_path.strip_prefix("."))
{
parent_path = stripped;
}
parent_path
}
fn get_generated_file_name(orig_img_path: &str) -> PathBuf {
let path = Path::new(&orig_img_path);
let parent = path
.parent()
.expect("There should be a parent route to an image")
.strip_prefix(".")
.unwrap();
// let parent = path
// .parent()
// .expect("There should be a parent route to an image")
// .strip_prefix(".")
// .unwrap();
let parent = strip_prefixes(path);
let file_name = path
.file_stem()
.expect("There should be a name for every img");
@ -178,25 +238,19 @@ fn test_get_generated_paths() {
);
}
fn generate_srcset(
path_name: &Path,
format: &ExportFormat,
resolutions: &[(u32, u32, f32)],
) -> String {
fn generate_srcset(path: &Path, format: &ExportFormat, resolutions: &[(u32, u32, f32)]) -> String {
resolutions
.iter()
.map(|resolution| {
let extension = format.get_extension();
let (width, height, density) = resolution;
let path = path_name
.to_str()
.expect("Path to an image has to be valid");
let path_name = path.to_str().expect("Path to an image has to be valid");
let formatted_density = if density.fract() == 0.0 {
format!("{}", density) // Convert to integer if there is no decimal part
} else {
format!("{:.1}", density) // Format to 1 decimal place if there is a fractional part
};
format!("{path}_{width}x{height}.{extension} {formatted_density}x")
format!("{path_name}_{width}x{height}.{extension} {formatted_density}x")
})
.collect::<Vec<String>>()
.join(", ")
@ -243,26 +297,25 @@ fn test_generate_srcset() {
fn test_generate_picture_markup() {
let width = 300;
let height = 200;
let orig_img_path = "./images/uploads/img_name.jpg";
let result = r#"""
<picture>
let orig_img_path = "../static/images/uploads/2020-03-23_20-24-06_393.jpg";
let result = r#"<picture>
<source
srcset="./generated_images/images/uploads/img_name_300x200.avif 1x, ./generated_images/images/uploads/img_name_450x300.avif 1.5x, ./generated_images/images/uploads/img_name_600x400.avif 2x, ./generated_images/images/uploads/img_name_900x600.avif 3x, ./generated_images/images/uploads/img_name_1200x800.avif 4x"
srcset="./generated_images/static/images/uploads/2020-03-23_20-24-06_393_300x200.avif 1x, ./generated_images/static/images/uploads/2020-03-23_20-24-06_393_450x300.avif 1.5x, ./generated_images/static/images/uploads/2020-03-23_20-24-06_393_600x400.avif 2x, ./generated_images/static/images/uploads/2020-03-23_20-24-06_393_900x600.avif 3x, ./generated_images/static/images/uploads/2020-03-23_20-24-06_393_1200x800.avif 4x"
type="image/avif"
>
<source
srcset="./generated_images/images/uploads/img_name_300x200.jpg 1x, ./generated_images/images/uploads/img_name_450x300.jpg 1.5x, ./generated_images/images/uploads/img_name_600x400.jpg 2x, ./generated_images/images/uploads/img_name_900x600.jpg 3x, ./generated_images/images/uploads/img_name_1200x800.jpg 4x"
>
<source
srcset="./generated_images/static/images/uploads/2020-03-23_20-24-06_393_300x200.jpg 1x, ./generated_images/static/images/uploads/2020-03-23_20-24-06_393_450x300.jpg 1.5x, ./generated_images/static/images/uploads/2020-03-23_20-24-06_393_600x400.jpg 2x, ./generated_images/static/images/uploads/2020-03-23_20-24-06_393_900x600.jpg 3x, ./generated_images/static/images/uploads/2020-03-23_20-24-06_393_1200x800.jpg 4x"
type="image/jpeg"
>
<img
src="./generated_images/images/uploads/img_name_300x200.jpg"
width="300"
height="200"
>
</picture>
"""#;
src="./generated_images/static/images/uploads/2020-03-23_20-24-06_393_300x200.jpg"
width="300"
height="200"
alt="Testing image alt"
>
</picture>"#;
assert_eq!(
generate_picture_markup(orig_img_path, width, height)
generate_picture_markup(orig_img_path, width, height, "Testing image alt")
.expect("picture markup has to be generated"),
result
);