stefanbohacek/gist:4dde5b0231e504a4ae29e234306b8602

## gistfile1.txt
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <link
      rel="stylesheet"
      href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/css/bootstrap.min.css"
      integrity="sha384-rbsA2VBKQhggwzxH7pPCaAqO46MgnOM80zW1RWuH61DGLwZJEdK2Kadq2F9CUG65"
      crossorigin="anonymous"
    />
  </head>
  <body>
    <div class="bg-light p-5 mt-5 mb-5">
      <form id="data-form">
        <div class="mb-3">
          <label for="instance" class="form-label">Mastodon instance</label>
          <div class="input-group">
            <span class="input-group-text" id="basic-addon3">https://</span>
            <input
              required
              type="text"
              class="form-control"
              name="instance"
              id="instance"
              placeholder="mastodon.social"
            />
          </div>
          <div class="form-text">
            The name of the Mastodon instance, without <code>https</code>.
          </div>
        </div>
        <div class="mb-3">
          <label for="data" class="form-label"
            >Fediverse connections data</label
          >
          <input
            required
            class="form-control"
            type="file"
            name="data"
            id="data"
            accept=".csv"
          />
          <div class="form-text">
            Download yours
            <a
              href="https://data.stefanbohacek.dev/projects/fediverse"
              target="_blank"
              >here</a
            >.
          </div>
        </div>
        <button id="form-submit" type="submit" class="btn btn-primary">
          Submit
        </button>
      </form>
      <div id="results"></div>
    </div>
    <script>
      const csvToJSON = (csv, headers, quoteChar = '"', delimiter = ",") => {
        const regex = new RegExp(
          `\\s*(${quoteChar})?(.*?)\\1\\s*(?:${delimiter}|$)`,
          "gs"
        );

        const match = (line) =>
          [...line.matchAll(regex)].map((m) => m[2]).slice(0, -1);

        const lines = csv.split("\n");
        const heads = headers ?? match(lines.shift());

        return lines.map((line) => {
          return match(line).reduce((acc, cur, i) => {
            const val = cur.length <= 0 ? null : Number(cur) || cur;
            const key = heads[i] ?? `extra_${i}`;
            return { ...acc, [key]: val };
          }, {});
        });
      };

      const getDomainBlocks = async (instance) => {
        let results = {};
        try {
          const resp = await fetch(
            `https://${instance}/api/v1/instance/domain_blocks`
          );
          const respJSON = await resp.json();
          respJSON.forEach((domain) => {
            if (domain.severity === "suspend") {
              results[domain.domain] = domain;
            }
          });
        } catch (error) {
          alert(`Domain block list not available for ${instance}.`);
          toggleFormElements(form, false);
        } finally {
          return results;
        }
      };

      const toggleFormElements = (form, disabled) => {
        const formElements = form.elements;

        for (element of formElements) {
          if (element.tagName === "BUTTON") {
            element.disabled = disabled;
          } else {
            element.readOnly = disabled;
          }
        }
      };

      const form = document.getElementById("data-form");
      const formSubmitBtn = document.getElementById("form-submit");
      const resultsElement = document.getElementById("results");

      form.addEventListener("submit", (event) => {
        toggleFormElements(form, true);

        event.preventDefault();
        const formData = new FormData(form);
        const values = [...formData.entries()];

        const instance = formData.get("instance");
        const data = formData.get("data");

        let lostContacts = [];
        let reader = new FileReader();

        reader.onload = async (e) => {
          const dataJSON = csvToJSON(e.target.result);
          const blockedDomains = await getDomainBlocks(instance);
          let resultsHTML = "";

          if (blockedDomains) {
            const blockedDomainNames = Object.keys(blockedDomains);

            if (blockedDomainNames && blockedDomainNames.length) {
              for (const instance of dataJSON) {
                if (blockedDomainNames.includes(instance.domain)) {
                  instance.comment = blockedDomains[instance.domain].comment;
                  lostContacts.push(instance);
                }
              }

              if (lostContacts && lostContacts.length) {
                resultsHTML = `
                  <p class="mt-4">By moving to ${instance}, you will lose ${lostContacts.length.toLocaleString()} connection(s).</p>
                  <table class="table table-striped">
                    <thead>
                      <tr>
                        <th scope="col">Instance</th>
                        <th scope="col">Connections</th>
                        <th scope="col">Comment</th>
                      </tr>
                    </thead>
                    <tbody>
                    ${lostContacts
                      .map(
                        (domain) => `
                      <tr>
                        <th scope="row">${domain.domain}</th>
                        <td>${domain.connections.toLocaleString()}</td>
                        <td>${domain.comment}</td>
                      </tr>
                    `
                      )
                      .join("")}
                    </tbody>
                  </table>
                  `;
              } else {
                resultsHTML = `<p class="mt-4"><strong>Good news!</strong> None of your contacts' instances are blocked by ${instance}.`;
              }
            }
          }

          resultsElement.innerHTML = resultsHTML;
          if (lostContacts && lostContacts.length){
            resultsElement.scrollIntoView({
              behavior: 'smooth'
            });
          }

          toggleFormElements(form, false);
        };

        reader.readAsBinaryString(data);
      });
    </script>
  </body>
</html>
	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8" />
	<meta name="viewport" content="width=device-width, initial-scale=1.0" />
	<title>Document</title>
	<link
	rel="stylesheet"
	href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/css/bootstrap.min.css"
	integrity="sha384-rbsA2VBKQhggwzxH7pPCaAqO46MgnOM80zW1RWuH61DGLwZJEdK2Kadq2F9CUG65"
	crossorigin="anonymous"
	/>
	</head>
	<body>
	<div class="bg-light p-5 mt-5 mb-5">
	<form id="data-form">
	<div class="mb-3">
	<label for="instance" class="form-label">Mastodon instance</label>
	<div class="input-group">
	<span class="input-group-text" id="basic-addon3">https://</span>
	<input
	required
	type="text"
	class="form-control"
	name="instance"
	id="instance"
	placeholder="mastodon.social"
	/>
	</div>
	<div class="form-text">
	The name of the Mastodon instance, without <code>https</code>.
	</div>
	</div>
	<div class="mb-3">
	<label for="data" class="form-label"
	>Fediverse connections data</label
	>
	<input
	required
	class="form-control"
	type="file"
	name="data"
	id="data"
	accept=".csv"
	/>
	<div class="form-text">
	Download yours
	<a
	href="https://data.stefanbohacek.dev/projects/fediverse"
	target="_blank"
	>here</a
	>.
	</div>
	</div>
	<button id="form-submit" type="submit" class="btn btn-primary">
	Submit
	</button>
	</form>
	<div id="results"></div>
	</div>
	<script>
	const csvToJSON = (csv, headers, quoteChar = '"', delimiter = ",") => {
	const regex = new RegExp(
	`\\s(${quoteChar})?(.?)\\1\\s*(?:${delimiter}\|$)`,
	"gs"
	);

	const match = (line) =>
	[...line.matchAll(regex)].map((m) => m[2]).slice(0, -1);

	const lines = csv.split("\n");
	const heads = headers ?? match(lines.shift());

	return lines.map((line) => {
	return match(line).reduce((acc, cur, i) => {
	const val = cur.length <= 0 ? null : Number(cur) \|\| cur;
	const key = heads[i] ?? `extra_${i}`;
	return { ...acc, [key]: val };
	}, {});
	});
	};

	const getDomainBlocks = async (instance) => {
	let results = {};
	try {
	const resp = await fetch(
	`https://${instance}/api/v1/instance/domain_blocks`
	);
	const respJSON = await resp.json();
	respJSON.forEach((domain) => {
	if (domain.severity === "suspend") {
	results[domain.domain] = domain;
	}
	});
	} catch (error) {
	alert(`Domain block list not available for ${instance}.`);
	toggleFormElements(form, false);
	} finally {
	return results;
	}
	};

	const toggleFormElements = (form, disabled) => {
	const formElements = form.elements;

	for (element of formElements) {
	if (element.tagName === "BUTTON") {
	element.disabled = disabled;
	} else {
	element.readOnly = disabled;
	}
	}
	};

	const form = document.getElementById("data-form");
	const formSubmitBtn = document.getElementById("form-submit");
	const resultsElement = document.getElementById("results");

	form.addEventListener("submit", (event) => {
	toggleFormElements(form, true);

	event.preventDefault();
	const formData = new FormData(form);
	const values = [...formData.entries()];

	const instance = formData.get("instance");
	const data = formData.get("data");

	let lostContacts = [];
	let reader = new FileReader();

	reader.onload = async (e) => {
	const dataJSON = csvToJSON(e.target.result);
	const blockedDomains = await getDomainBlocks(instance);
	let resultsHTML = "";

	if (blockedDomains) {
	const blockedDomainNames = Object.keys(blockedDomains);

	if (blockedDomainNames && blockedDomainNames.length) {
	for (const instance of dataJSON) {
	if (blockedDomainNames.includes(instance.domain)) {
	instance.comment = blockedDomains[instance.domain].comment;
	lostContacts.push(instance);
	}
	}

	if (lostContacts && lostContacts.length) {
	resultsHTML = `
	<p class="mt-4">By moving to ${instance}, you will lose ${lostContacts.length.toLocaleString()} connection(s).</p>
	<table class="table table-striped">
	<thead>
	<tr>
	<th scope="col">Instance</th>
	<th scope="col">Connections</th>
	<th scope="col">Comment</th>
	</tr>
	</thead>
	<tbody>
	${lostContacts
	.map(
	(domain) => `
	<tr>
	<th scope="row">${domain.domain}</th>
	<td>${domain.connections.toLocaleString()}</td>
	<td>${domain.comment}</td>
	</tr>
	`
	)
	.join("")}
	</tbody>
	</table>
	`;
	} else {
	resultsHTML = `<p class="mt-4"><strong>Good news!</strong> None of your contacts' instances are blocked by ${instance}.`;
	}
	}
	}

	resultsElement.innerHTML = resultsHTML;
	if (lostContacts && lostContacts.length){
	resultsElement.scrollIntoView({
	behavior: 'smooth'
	});
	}

	toggleFormElements(form, false);
	};

	reader.readAsBinaryString(data);
	});
	</script>
	</body>
	</html>