[ADD] base_import: batching (& some other features)

various UI changes
------------------

* renamed "test import" button to "test"
* move relation fields thing to debug mode
* remove "Defer parent/child computation" option as it was deprecated
  / removed from the backend in
  80f1ac3599ee630e7556ff4fcf3eb192931eccd8, turns out this checkbox
  existed inactive for longer than it's been of any use (added in
  68cb2ade09206b0abb3f7c8dccb5d35a6499f802 on 2017-11-29, made
  non-operating on 2018-01-24, that's so sad)

batching
--------

* add support for batching imports (skip & limit parameters)
* modify client to use batched imports & properly adapt responses so
  it still looks like a single import for the client (more or less)
  e.g. update row numbers in error messages, etc...
* properly handle partial imports though
* disable usual loading throbber to have a single progress
  notification displayed continuously throughout all the batches: the
  normal throbber only shows after 3s of waiting for an RPC response,
  so it would keep flashing in and out (appear 3s into a batch's
  import then disappear at the end only to reappear 3s into the next
  batch's loading)

NOTE: the limit is row-wise. If a record straddles the limit (because
of nested O2M records), the record is imported in full and the "next
row" is whatever row follows the record. This means a limit of 10 can
lead to an import of 17 lines, and as the progress indicator is in
records# the increments can jump around.

Task 2059448

1 files changed, 42 insertions, 30 deletions

diff --git a/addons/base_import/static/src/xml/base_import.xml b/addons/base_import/static/src/xml/base_import.xml
index 6d69d6995aa..aa0e956f9fd 100644
--- a/addons/base_import/static/src/xml/base_import.xml
+++ b/addons/base_import/static/src/xml/base_import.xml
@@ -4,7 +4,7 @@
         <form action="" method="post" enctype="multipart/form-data" class="oe_import">
             <input type="hidden" name="csrf_token" t-att-value="csrf_token"/>
             <input type="hidden" name="import_id"/>
-            <div class="oe_import_box col-lg-12 d-none">
+            <div class="oe_import_box d-none">
                 <input accept=".csv, .xls, .xlsx, .xlsm, .ods" t-attf-id="file_#{_id}"
                       name="file" class="oe_import_file" type="file" style="display:none;"/>
                 <div class="oe_import_with_file row">
@@ -36,34 +36,45 @@
                         </div>
                 </div>
             </div>
+            <div class="o_import_batch_alert alert alert-warning d-none">
+                Due to its large size, the file will be imported by batches.
+            </div>
+            <div class="o_import_partial_alert alert alert-warning d-none">
+                Click 'Resume' to proceed with the import, resuming at line
+                <span class="o_import_partial_count">0</span>.<br/>
+                You can test or reload your file before resuming the import.
+            </div>
 
-            <div class="oe_import_with_file oe_padding col-md-12 d-none">
+            <div class="oe_import_with_file d-none">
                 <h2>Map your columns to import</h2>
-                <div title="If the model uses openchatter, history tracking
-                            will set up subscriptions and send notifications
-                            during the import, but lead to a slower import."
-                    class="oe_import_tracking">
-                    <input type="checkbox" id="oe_import_tracking"/>
-                    <label for="oe_import_tracking">
-                        Track history during import
-                    </label>
-                </div>
-                <div title="If the model uses parent/child relations, computing the
-                    parent / child relation occurs on every line, and lead to a slower import.
-                    Defering it can speed up import."
-                    class="oe_import_deferparentstore">
-                    <input type="checkbox" id="oe_import_deferparentstore" checked="checked"/>
-                    <label for="oe_import_deferparentstore">
-                        Defer parent/child computation
-                    </label>
+                <div class="oe_import_debug_options">
+                    <div title="If the model uses openchatter, history tracking will set up subscriptions and send notifications during the import, but lead to a slower import." class="oe_import_debug_option">
+                        <input type="checkbox" id="oe_import_tracking"/>
+                        <label for="oe_import_tracking">
+                            Track history during import
+                        </label>
+                    </div>
+                    <div>
+                        <input type="checkbox" class="oe_import_has_header"
+                               id="oe_import_has_header" checked="checked"/>
+                        <label for="oe_import_has_header">The first row
+                         contains the label of the column</label>
+                    </div>
+                    <div class="js_import_options oe_import_debug_option oe_import_batch_limit">
+                        <label for="oe_import_batch_limit">Batch limit</label>
+                        <input id="oe_import_batch_limit" value="2000"/>
+                    </div>
+                    <div class="js_import_options oe_import_debug_option" title="Warning: ignores the labels line, empty lines and
+                            lines composed only of empty cells">
+                        <label for="oe_import_row_start">Start at line</label>
+                        <input id="oe_import_row_start" value="1"/>
+                    </div>
+                    <div class="oe_import_debug_option">
+                        <input type="checkbox" class="oe_import_advanced_mode" checked="checked"
+                               id="oe_import_advanced_mode"/>
+                        <label for="oe_import_advanced_mode">Show fields of relation fields (advanced)</label>
+                    </div>
                 </div>
-                <input type="checkbox" class="oe_import_has_header"
-                       id="oe_import_has_header" checked="checked"/>
-                <label for="oe_import_has_header">The first row
-                 contains the label of the column</label>
-                <input type="checkbox" class="oe_import_advanced_mode" checked="checked"
-                       id="oe_import_advanced_mode"/>
-                <label for="oe_import_advanced_mode">Show fields of relation fields (advanced)</label>
                 <p class="oe_import_noheaders text-muted">If the file contains
                 the column names, Odoo can try auto-detecting the
                 field corresponding to the column. This makes imports
@@ -95,8 +106,9 @@
     </t>
 
     <t t-name="ImportView.buttons">
-        <button type="button" class="btn btn-primary o_import_import d-none">Import</button>
-        <button type="button" class="btn btn-secondary o_import_validate d-none">Test Import</button>
+        <button type="button" class="btn btn-primary o_import_import o_import_import_full d-none">Import</button>
+        <button type="button" class="btn btn-primary o_import_import o_import_import_partial d-none">Resume</button>
+        <button type="button" class="btn btn-secondary o_import_validate d-none">Test</button>
         <button type="button" class="btn btn-secondary o_import_file_reload d-none">Reload File</button>
         <button type="button" class="btn btn-primary oe_import_file">Load File</button>
         <button type="button" class="btn btn-secondary o_import_cancel">Cancel</button>
@@ -132,7 +144,7 @@
         </tbody>
     </t>
     <t t-name="ImportView.preview.error">
-        <div class="oe_import_report bg-danger">
+        <div class="oe_import_report alert alert-danger">
             <p>Import preview failed due to: <t t-esc="error"/>.</p>
             <p>For CSV files, you may need to select the correct separator.</p>
             <p t-if="preview">Here is the start of the file we could not import:</p>
@@ -141,7 +153,7 @@
     </t>
     <ul t-name="ImportView.error">
         <li t-foreach="errors" t-as="error"
-            t-attf-class="oe_import_report bg-#{error_value[0].type}">
+            t-attf-class="oe_import_report alert alert-#{error_value[0].type}">
             <t t-if="error_value.length gt 1">
                 <t t-call="ImportView.error.multi.header">
                     <t t-set="error" t-value="error_value[0]"/>