DEV Community

Jesse Phillips
Jesse Phillips

Posted on

Hobby Project: Reference Content File in Meta Data

I spent this effort on a cross-reference in the meta data to the content file. This eliminates a required convention where file name of the meta and content is the same, which is a nice convention but I want to allow folders to be specified. We'll see how this evolves.

in(buildPath(folder,articleContentFolder).exists, format("Create direcorty `buildPath(\"%s\",articleContentFolder)` before calling to save articles.", folder))
Enter fullscreen mode Exit fullscreen mode

I will be enforcing articles being written in a sub directory of the output location. I have updated the contract to check the sub folder exists.

I have also modify the error message to provide a code sample. I've decided this sub directory is not configurable making the error message more valuable.

out(path) {
    assert(path.articleSaveLocation != path.metaSaveLocation, "Can't save to same file");
    assert(path.articleSaveLocation.endsWith(path.articleMetaPath), "Meta Reference to Article File must match.");
    assert(!path.articleSaveLocation.find(folder).empty, "Save Locations should utilized specified folder");
    assert(!path.metaSaveLocation.find(folder).empty, "Save Locations should utilized specified folder");
Enter fullscreen mode Exit fullscreen mode

Since I'm creating an intricate relationship between the three paths, I wanted to verify that relationship.

To create this validation I needed to pull out the logic to create the paths from the method writing the data.

I also wired up the api pulling.

if(!exists(buildPath(savePath, articleContentFolder)))
    mkdirRecurse(buildPath(savePath, articleContentFolder));

Enter fullscreen mode Exit fullscreen mode

Since I choose to delegate folder creation, the first step is creating the needed directory structure.

After that the rest of the components have been built and all I need is to sequence the calls.

D also provides a way to delegate the output. When I looked into this I remember I also want to start using iopipe. But ultimately I did not feel that the output range concept was going to hold its weight. saveArticles is already pretty disconnected and could easily be replaced.

In this case I did not start with the tests or contracts, these were added after manual confirmation.

unittest {
    ArticleMeta meta;
    meta.title = "Article Title";
    articlePaths("someLocation", meta);
Enter fullscreen mode Exit fullscreen mode

The specific unittest does no validation itself. Instead it exists to exercise the contract. By placing the test on the contract allow validation during code execution along with the unittests identified.

For those concerned with performance, contracts are removed if building release.

Top comments (0)