Feature: bulk creation of bookmarks

This changes creates a new form in addlink page allowing to create
multiple bookmarks at once more easily. It focuses on re-using as much
existing code and template component as  possible.

These changes includes:
  - a new form in addlink (hidden behind a button by default),
containing a text area for URL, and tags/private status to apply to
created links
  - this form displays a new template called editlink.batch, itself
including editlink template multiple times
  - User interation in this new templates are handle by a new JS script
(shaare-batch.js) making AJAX requests, and therefore does not need page
reloading
  - ManageShaareController has been split into 3 distinct controllers:
    + ShaareAdd: displays addlink template
    + ShaareManage: various operation applied on existing shaares
(change visibility, pin, deletion, etc.)
    + ShaarePublish: handles creation/edit forms and saving Shaare's
form
  - Updated translations

Fixes #137

4 files changed, 204 insertions, 23 deletions

diff --git a/assets/common/js/metadata.js b/assets/common/js/metadata.js
index 2b013364..d5a28a35 100644
--- a/assets/common/js/metadata.js
+++ b/assets/common/js/metadata.js
@@ -56,37 +56,41 @@ function updateThumb(basePath, divElement, id) {
 
 (() => {
   const basePath = document.querySelector('input[name="js_base_path"]').value;
-  const loaders = document.querySelectorAll('.loading-input');
 
   /*
    * METADATA FOR EDIT BOOKMARK PAGE
    */
-  const inputTitle = document.querySelector('input[name="lf_title"]');
-  if (inputTitle != null) {
-    if (inputTitle.value.length > 0) {
-      clearLoaders(loaders);
-      return;
-    }
+  const inputTitles = document.querySelectorAll('input[name="lf_title"]');
+  if (inputTitles != null) {
+    [...inputTitles].forEach((inputTitle) => {
+      const form = inputTitle.closest('form[name="linkform"]');
+      const loaders = form.querySelectorAll('.loading-input');
+
+      if (inputTitle.value.length > 0) {
+        clearLoaders(loaders);
+        return;
+      }
 
-    const url = document.querySelector('input[name="lf_url"]').value;
+      const url = form.querySelector('input[name="lf_url"]').value;
 
-    const xhr = new XMLHttpRequest();
-    xhr.open('GET', `${basePath}/admin/metadata?url=${encodeURI(url)}`, true);
-    xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
-    xhr.onload = () => {
-      const result = JSON.parse(xhr.response);
-      Object.keys(result).forEach((key) => {
-        if (result[key] !== null && result[key].length) {
-          const element = document.querySelector(`input[name="lf_${key}"], textarea[name="lf_${key}"]`);
-          if (element != null && element.value.length === 0) {
-            element.value = he.decode(result[key]);
+      const xhr = new XMLHttpRequest();
+      xhr.open('GET', `${basePath}/admin/metadata?url=${encodeURI(url)}`, true);
+      xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
+      xhr.onload = () => {
+        const result = JSON.parse(xhr.response);
+        Object.keys(result).forEach((key) => {
+          if (result[key] !== null && result[key].length) {
+            const element = form.querySelector(`input[name="lf_${key}"], textarea[name="lf_${key}"]`);
+            if (element != null && element.value.length === 0) {
+              element.value = he.decode(result[key]);
+            }
           }
-        }
-      });
-      clearLoaders(loaders);
-    };
+        });
+        clearLoaders(loaders);
+      };
 
-    xhr.send();
+      xhr.send();
+    });
   }
 
   /*
diff --git a/assets/common/js/shaare-batch.js b/assets/common/js/shaare-batch.js
new file mode 100644
index 00000000..9f612993
--- /dev/null
+++ b/assets/common/js/shaare-batch.js
@@ -0,0 +1,107 @@
+const sendBookmarkForm = (basePath, formElement) => {
+  const inputs = formElement
+    .querySelectorAll('input[type="text"], textarea, input[type="checkbox"], input[type="hidden"]');
+
+  const formData = new FormData();
+  [...inputs].forEach((input) => {
+    formData.append(input.getAttribute('name'), input.value);
+  });
+
+  return new Promise((resolve, reject) => {
+    const xhr = new XMLHttpRequest();
+    xhr.open('POST', `${basePath}/admin/shaare`);
+    xhr.onload = () => {
+      if (xhr.status !== 200) {
+        alert(`An error occurred. Return code: ${xhr.status}`);
+        reject();
+      } else {
+        formElement.remove();
+        resolve();
+      }
+    };
+    xhr.send(formData);
+  });
+};
+
+const sendBookmarkDelete = (buttonElement, formElement) => (
+  new Promise((resolve, reject) => {
+    const xhr = new XMLHttpRequest();
+    xhr.open('GET', buttonElement.href);
+    xhr.onload = () => {
+      if (xhr.status !== 200) {
+        alert(`An error occurred. Return code: ${xhr.status}`);
+        reject();
+      } else {
+        formElement.remove();
+        resolve();
+      }
+    };
+    xhr.send();
+  })
+);
+
+const redirectIfEmptyBatch = (basePath, formElements, path) => {
+  if (formElements == null || formElements.length === 0) {
+    window.location.href = `${basePath}${path}`;
+  }
+};
+
+(() => {
+  const basePath = document.querySelector('input[name="js_base_path"]').value;
+  const getForms = () => document.querySelectorAll('form[name="linkform"]');
+
+  const cancelButtons = document.querySelectorAll('[name="cancel-batch-link"]');
+  if (cancelButtons != null) {
+    [...cancelButtons].forEach((cancelButton) => {
+      cancelButton.addEventListener('click', (e) => {
+        e.preventDefault();
+        e.target.closest('form[name="linkform"]').remove();
+        redirectIfEmptyBatch(basePath, getForms(), '/admin/add-shaare');
+      });
+    });
+  }
+
+  const saveButtons = document.querySelectorAll('[name="save_edit"]');
+  if (saveButtons != null) {
+    [...saveButtons].forEach((saveButton) => {
+      saveButton.addEventListener('click', (e) => {
+        e.preventDefault();
+
+        const formElement = e.target.closest('form[name="linkform"]');
+        sendBookmarkForm(basePath, formElement)
+          .then(() => redirectIfEmptyBatch(basePath, getForms(), '/'));
+      });
+    });
+  }
+
+  const saveAllButtons = document.querySelectorAll('[name="save_edit_batch"]');
+  if (saveAllButtons != null) {
+    [...saveAllButtons].forEach((saveAllButton) => {
+      saveAllButton.addEventListener('click', (e) => {
+        e.preventDefault();
+
+        const promises = [];
+        [...getForms()].forEach((formElement) => {
+          promises.push(sendBookmarkForm(basePath, formElement));
+        });
+
+        Promise.all(promises).then(() => {
+          window.location.href = basePath || '/';
+        });
+      });
+    });
+  }
+
+  const deleteButtons = document.querySelectorAll('[name="delete_link"]');
+  if (deleteButtons != null) {
+    [...deleteButtons].forEach((deleteButton) => {
+      deleteButton.addEventListener('click', (e) => {
+        e.preventDefault();
+
+        const formElement = e.target.closest('form[name="linkform"]');
+        sendBookmarkDelete(e.target, formElement)
+          .then(() => redirectIfEmptyBatch(basePath, getForms(), '/'));
+      });
+    });
+  }
+})();
diff --git a/assets/default/js/base.js b/assets/default/js/base.js
index 7f6b9637..9161b4fc 100644
--- a/assets/default/js/base.js
+++ b/assets/default/js/base.js
@@ -634,4 +634,25 @@ function init(description) {
       });
     });
   }
+
+  const bulkCreationButton = document.querySelector('.addlink-batch-show-more-block');
+  if (bulkCreationButton != null) {
+    const toggleBulkCreationVisibility = (showMoreBlockElement, formElement) => {
+      if (bulkCreationButton.classList.contains('pure-u-0')) {
+        showMoreBlockElement.classList.remove('pure-u-0');
+        formElement.classList.add('pure-u-0');
+      } else {
+        showMoreBlockElement.classList.add('pure-u-0');
+        formElement.classList.remove('pure-u-0');
+      }
+    };
+
+    const bulkCreationForm = document.querySelector('.addlink-batch-form-block');
+
+    toggleBulkCreationVisibility(bulkCreationButton, bulkCreationForm);
+    bulkCreationButton.querySelector('a').addEventListener('click', (e) => {
+      e.preventDefault();
+      toggleBulkCreationVisibility(bulkCreationButton, bulkCreationForm);
+    });
+  }
 })();
diff --git a/assets/default/scss/shaarli.scss b/assets/default/scss/shaarli.scss
index 7dc61903..7c85dee8 100644
--- a/assets/default/scss/shaarli.scss
+++ b/assets/default/scss/shaarli.scss
@@ -1023,6 +1023,10 @@ body,
     &.button-red {
       background: $red;
     }
+
+    &.button-grey {
+      background: $light-grey;
+    }
   }
 
   .submit-buttons {
@@ -1083,6 +1087,11 @@ body,
           position: absolute;
           right: 5%;
         }
+
+        &.button-grey {
+          position: absolute;
+          left: 5%;
+        }
       }
     }
   }
@@ -1750,6 +1759,46 @@ form {
   }
 }
 
+// Batch creation
+input[name='save_edit_batch'] {
+  @extend %page-form-button;
+}
+
+.addlink-batch-show-more {
+  display: flex;
+  align-items: center;
+  margin: 20px 0 8px;
+
+  a {
+    color: var(--main-color);
+    text-decoration: none;
+  }
+
+  &::before,
+  &::after {
+    content: "";
+    flex-grow: 1;
+    background: rgba(0, 0, 0, 0.35);
+    height: 1px;
+    font-size: 0;
+    line-height: 0;
+  }
+
+  &::before {
+    margin: 0 16px 0 0;
+  }
+
+  &::after {
+    margin: 0 0 0 16px;
+  }
+}
+
+.addlink-batch-form-block {
+  .pure-alert {
+    margin: 25px 0 0 0;
+  }
+}
+
 // Print rules
 @media print {
   .shaarli-menu {