From 69bbd4ed3804833b15285cf8637e96e59135f223 Mon Sep 17 00:00:00 2001
From: Julian T <julian@jtle.dk>
Date: Tue, 20 Jul 2021 22:30:45 +0200
Subject: Switch from python to rust

Rust implementation can parse flags, load config and iterate image files
---
 .gitignore     |    5 +
 Cargo.lock     | 1069 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml     |   15 +
 build.py       |  231 ------------
 shell.nix      |    6 +-
 src/context.rs |  105 ++++++
 src/main.rs    |   14 +
 7 files changed, 1211 insertions(+), 234 deletions(-)
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 delete mode 100755 build.py
 create mode 100644 src/context.rs
 create mode 100644 src/main.rs

diff --git a/.gitignore b/.gitignore
index 97f8a26..35d134e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,6 @@
 dist/imgs/*
+
+
+# Added by cargo
+
+/target
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..5f1e4cd
--- /dev/null
+++ b/Cargo.lock
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..5b0a26f
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,15 @@
+[package]
+name = "gallery"
+version = "0.1.0"
+authors = ["Julian T <julian@jtle.dk>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+tera = "1.12"
+image = "0.23"
+serde = { version = "1.0", features = ["derive"] }
+serde_yaml = "0.8"
+structopt = "0.3"
+glob = "0.3"
diff --git a/build.py b/build.py
deleted file mode 100755
index 9dccb8e..0000000
--- a/build.py
+++ /dev/null
@@ -1,231 +0,0 @@
-#!/usr/bin/env python3
-import jinja2
-import PIL.Image
-import PIL.ImageOps
-import argparse
-import json
-import yaml
-import os
-import re
-import hashlib
-import glob
-from datetime import datetime
-
-imagereg = re.compile("([a-z0-9]*)\\..*")
-thumbsize = 480
-
-
-def hashfile(fname):
-    md5 = hashlib.md5()
-    print(fname)
-    with open(fname, "rb") as f:
-        for chunk in iter(lambda: f.read(4096), b""):
-            md5.update(chunk)
-
-    return md5
-
-
-def parse_res(res):
-    return int(res)
-
-
-class FileLoader(jinja2.BaseLoader):
-    def get_source(self, environment, template):
-        if not os.path.exists(template):
-            raise jinja2.TemplateNotFound(template)
-        mtime = os.path.getmtime(template)
-        with open(template, "r") as f:
-            source = f.read()
-        return source, template, lambda: mtime == os.path.getmtime(template)
-
-
-class ImageLocation:
-    def __init__(self, folder, extension):
-        self.folder = folder
-        self.stuff = {}
-        self.ext = extension
-
-        self.unused = set()
-        self.existing = {}
-
-        if not os.path.isdir(folder):
-            os.mkdir(folder)
-
-        self.look()
-
-        self.tmpname = os.path.join(folder, "tmp")
-
-    def look(self):
-        for name in os.listdir(self.folder):
-            m = imagereg.match(name)
-            if m is not None:
-                fhash = m.group(1)
-
-                self.unused.add(fhash)
-                self.existing[fhash] = name
-
-    def convert(self, imgname, resolution):
-        # First determine the hash from settings
-        thash = hashlib.md5(
-                bytes(
-                    f"{resolution}+{self.ext}" + imgname,
-                    encoding="utf8")
-                ).hexdigest()
-
-        # Now check if it exists
-        if thash in self.existing:
-            print(f"Skipping file {imgname}[{thash}]")
-            return self.existing[thash], thash
-
-        # Okay convert it
-        fname = f"{thash}.{self.ext}"
-        print(f"Converting file {imgname} to {fname}")
-
-        tmpname = f"{self.tmpname}.{self.ext}"
-        with PIL.Image.open(imgname) as im:
-            target_height = resolution
-            im = PIL.ImageOps.exif_transpose(im)
-            if im.size[0] > target_height:
-                res = (int((im.size[0] / im.size[1]) * target_height), target_height)
-                im = im.resize(res, PIL.Image.ANTIALIAS)
-
-            im.save(tmpname)
-
-        os.rename(tmpname, os.path.join(self.folder, fname))
-
-        self.existing[thash] = fname
-        self.unused.add(thash)
-
-        return fname, thash
-
-    def fetch(self, imgname, resolution, relto=None):
-        # Check if we already have it
-        fname, hash = self.convert(imgname, resolution)
-
-        # Mark the hash as used
-        self.unused.remove(hash)
-
-        if relto is not None:
-            full = os.path.join(self.folder, fname)
-            return os.path.relpath(full, start=relto)
-
-        return fname
-
-    def clean(self):
-        print("Running cleanup")
-        for uhash in self.unused:
-            fname = os.path.join(self.folder, self.existing[uhash])
-            print(f"Removing file {fname}")
-            os.remove(fname)
-
-
-class Image:
-    def __init__(self, filename):
-        self.name = os.path.basename(filename)
-        self.filename = filename
-        self.description = ""
-        self.url = ""
-        self.thumburl = ""
-        self.fullurl = ""
-        self.file = filename
-
-        self.taken = None
-        self.load_metadata()
-
-    def load_metadata(self):
-        try:
-            with PIL.Image.open(self.filename) as im:
-                taken_str = im.getexif()[36867]
-        except KeyError:
-            print(f"Could not load date from image {self.filename}")
-            return
-
-        self.taken = datetime.strptime(taken_str, "%Y:%m:%d %H:%M:%S")
-
-
-def value_or_default(val, default=None):
-    if val is None:
-        return default
-    return val
-
-
-class Loader:
-    def __init__(self, config_file, loadpath):
-        self.config = Loader.__load_config(config_file)
-
-        self.loadpath = loadpath
-
-        self.images = []
-
-    def __load_config(config_file):
-        config = {}
-        with open(config_file, "r") as f:
-            config = yaml.safe_load(f)
-
-        print(f"Loaded config: {config}")
-        return config
-
-    def load(self, imagehook=None, clear=False):
-        # Clear if neccesary
-        if clear:
-            self.images = []
-
-        # First find all images from glob
-        for image in glob.iglob(os.path.join(self.loadpath, self.config["imageglob"])):
-            img = Image(image)
-            img.description = self.config["info"].get(img.name, "")
-
-            if imagehook is not None:
-                img = imagehook(img)
-
-            self.images.append(img)
-
-        self.images = sorted(self.images,
-                             key=lambda img: value_or_default(img.taken,
-                                                              datetime.min),
-                             reverse=True)
-
-    def to_json(self):
-        jsonable = [img.__dict__ for img in self.images]
-        return json.dumps(jsonable)
-
-
-parser = argparse.ArgumentParser()
-parser.add_argument("--dest", "-d", default="dist", help="where to put resulting files")
-parser.add_argument("--size", "-s", type=int, default="1080", help="size to scale web images to")
-parser.add_argument("--commit", "-g", help="git commit hash to announce")
-parser.add_argument("--clean",  help="clean unused image files", action="store_true")
-parser.add_argument("--config", "-c", default=None, help="where to load image definitions from")
-parser.add_argument("--template", "-t", default="index.html.j2", help="html template to use")
-parser.add_argument("--cgit", "-w", help="cgit repo base url")
-parser.add_argument("load", help="where to load full size images from")
-parser.add_argument("--ext", "-e", default="png", help="image extension to use")
-
-args = parser.parse_args()
-
-if args.config is None:
-    args.config = os.path.join(args.load, "imginfo.yml")
-
-context = {
-        "cgit": args.cgit,
-        "git": args.commit
-        }
-
-loader = Loader(args.config, args.load)
-loc = ImageLocation(os.path.join(args.dest, "imgs"), args.ext)
-
-
-def imgload(img):
-    if context["cgit"] is not None:
-        img.fullurl = os.path.join(context["cgit"], "plain", img.name)
-
-    img.url = loc.fetch(img.file, args.size, relto=args.dest)
-    img.thumburl = loc.fetch(img.file, thumbsize, relto=args.dest)
-
-    return img
-
-
-loader.load(imgload, clear=True)
-
-with open(os.path.join(args.dest, "imgs", "index.json"), "w") as f:
-    f.write(loader.to_json())
diff --git a/shell.nix b/shell.nix
index c3dd58f..55db230 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,7 +1,7 @@
-{ pkgs ? import <nixpkgs> {}, pythonPackages ? pkgs.python38Packages }:
+{ pkgs ? import <nixpkgs> {} }:
 
 pkgs.mkShell {
-    buildInputs = with pythonPackages; [
-        pillow pyyaml
+    buildInputs = with pkgs; [
+        cargo gcc rls
     ];
 }
diff --git a/src/context.rs b/src/context.rs
new file mode 100644
index 0000000..6bc4c05
--- /dev/null
+++ b/src/context.rs
@@ -0,0 +1,105 @@
+use structopt::StructOpt;
+use serde::Deserialize;
+use std::collections::HashMap;
+use std::fs;
+use std::io;
+use std::path::PathBuf;
+
+#[derive(Debug, StructOpt)]
+#[structopt(name = "gallery")]
+pub struct Options {
+    #[structopt(long, help = "Just a thing")]
+    pub check: bool,
+    #[structopt(short, long, help = "Config file location")]
+    pub config: Option<PathBuf>,
+    #[structopt(help = "Picture location")]
+    pub load: PathBuf,
+}
+
+#[derive(Debug)]
+pub enum ConfigError {
+    Reading(io::Error),
+    Parsing(serde_yaml::Error),
+    CompilePattern(glob::PatternError),
+}
+
+#[derive(Deserialize, Debug)]
+pub struct Config {
+    pub imageglob: String,
+    pub info: HashMap<String, String>,
+
+    #[serde(skip)]
+    pub imageglob_compiled: glob::Pattern,
+}
+
+#[derive(Debug)]
+pub struct Context {
+    pub options: Options,
+    pub config: Config,
+}
+
+impl Context {
+    pub fn new_with_args() -> Result<Context, ConfigError> {
+        let opts = Options::from_args();
+        let config = Config::load_with_options(&opts)?;
+
+        Ok(Context {
+            options: opts,
+            config: config,
+        })
+    }
+
+    pub fn get_image_files(&self) -> Result<Vec<PathBuf>, io::Error> {
+        let files = fs::read_dir(&self.options.load)?
+            // Remove errored entries (SILENTLY)
+            .filter(|entry| entry.is_ok())
+            .map(|entry| entry.unwrap().path())
+            // Filter out directories and files that do not match pattern
+            .filter(|path| path.file_name()
+                    .map_or(false, |file| self.config.imageglob_compiled.matches(file.to_str().unwrap()))
+                    )
+            .collect();
+
+        Ok(files)
+    }
+}
+
+impl Config {
+    fn load_from_file(path: &PathBuf) -> Result<Config, ConfigError> {
+        let content = fs::read_to_string(path)?;
+        let mut config: Config = serde_yaml::from_str(&content)?;
+
+        config.imageglob_compiled = glob::Pattern::new(&config.imageglob)?;
+
+        Ok(config)
+    }
+
+    pub fn load_with_options(opts: &Options) -> Result<Config, ConfigError> {
+        let config_path = match &opts.config {
+            Some(path) => path.to_path_buf(),
+            None => opts.load.join("imginfo.yml"),
+        };
+
+        Config::load_from_file(&config_path)
+    }
+
+
+}
+
+impl From<io::Error> for ConfigError {
+    fn from(error: io::Error) -> Self {
+        ConfigError::Reading(error)
+    }
+}
+
+impl From<serde_yaml::Error> for ConfigError {
+    fn from(error: serde_yaml::Error) -> Self {
+        ConfigError::Parsing(error)
+    }
+}
+
+impl From<glob::PatternError> for ConfigError {
+    fn from(error: glob::PatternError) -> Self {
+        ConfigError::CompilePattern(error)
+    }
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..06346a2
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,14 @@
+mod context;
+use context::Context;
+
+fn main() {
+    println!("Hello, world!");
+
+    let ctx = Context::new_with_args().unwrap();
+
+    println!("{:?}", ctx);
+
+    for file in ctx.get_image_files().unwrap() {
+        println!("{}", file.display());
+    }
+}
-- 
cgit v1.2.3