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ScoDoc/app/tables/table_builder.py

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##############################################################################
# ScoDoc
# Copyright (c) 1999 - 2023 Emmanuel Viennet. All rights reserved.
# See LICENSE
##############################################################################
"""Classes pour aider à construire des tables de résultats
"""
from collections import defaultdict
from openpyxl import Workbook
from openpyxl.utils import get_column_letter
from app.scodoc import sco_excel
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class Element:
"Element de base pour les tables"
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def __init__(
self,
elt: str,
content=None,
classes: list[str] = None,
attrs: dict[str, str] = None,
data: dict = None,
):
self.elt = elt
self.attrs = attrs or {}
self.classes = classes or []
"list of classes for the element"
self.content = content
self.data = data or {}
"data-xxx"
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def html(self, extra_classes: set[str] = None) -> str:
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"html for element"
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classes = [cls for cls in (self.classes + (list(extra_classes or []))) if cls]
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attrs_str = f"""class="{' '.join(classes)}" """ if classes else ""
# Autres attributs:
attrs_str += " " + " ".join([f'{k}="{v}"' for (k, v) in self.attrs.items()])
# et data-x
attrs_str += " " + " ".join([f'data-{k}="{v}"' for k, v in self.data.items()])
return f"""<{self.elt} {attrs_str}>{self.html_content()}</{self.elt}>"""
def html_content(self) -> str:
"Le contenu de l'élément, en html."
return str(self.content or "")
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def add_class(self, klass: str):
"Add a class, do nothing if already there"
if klass not in self.classes:
self.classes.append(klass)
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class Table(Element):
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"""Construction d'une table de résultats
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Ordre des colonnes: groupées par groupes, et dans chaque groupe par ordre d'insertion
On fixe l'ordre des groupes par ordre d'insertion
ou par insert_group ou par set_column_groups.
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"""
def __init__(
self,
selected_row_id: str = None,
classes: list[str] = None,
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attrs: dict[str, str] = None,
data: dict = None,
with_foot_titles=True,
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row_class=None,
xls_sheet_name="feuille",
xls_before_table=[], # liste de cellules a placer avant la table
xls_style_base=None, # style excel pour les cellules
xls_columns_width=None, # { col_id : largeur en "pixels excel" }
caption="",
origin="",
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):
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super().__init__("table", classes=classes, attrs=attrs, data=data)
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self.row_class = row_class or Row
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self.rows: list["Row"] = []
"ordered list of Rows"
self.row_by_id: dict[str, "Row"] = {}
self.column_ids = []
"ordered list of columns ids"
self.groups = []
"ordered list of column groups names"
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self.group_titles = {}
"title (in header top row) for the group"
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self.head = []
self.foot = []
self.column_group = {}
"the group of the column: { col_id : group }"
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self.column_classes: defaultdict[str, set[str]] = defaultdict(set)
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"classe ajoutée à toutes les cellules de la colonne: { col_id : class }"
self.selected_row_id = selected_row_id
"l'id de la ligne sélectionnée"
self.titles = {}
"Column title: { col_id : titre }"
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self.head_title_row: "Row" = Row(
self, "title_head", cell_elt="th", classes=["titles"]
)
self.foot_title_row: "Row" = (
Row(self, "title_foot", cell_elt="th", classes=["titles"])
if with_foot_titles
else None
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)
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self.empty_cell = Cell.empty()
# Excel (xls) spécifique:
self.xls_before_table = xls_before_table
self.xls_columns_width = xls_columns_width or {}
self.xls_sheet_name = xls_sheet_name
self.xls_style_base = xls_style_base
#
self.caption = caption
self.origin = origin
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def _prepare(self):
"""Prepare the table before generation:
Sort table columns, add header/footer titles rows
"""
self.sort_columns()
# Titres
if self.head_title_row:
self.add_head_row(self.head_title_row)
if self.foot_title_row:
self.add_foot_row(self.foot_title_row)
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def get_row_by_id(self, row_id) -> "Row":
"return the row, or None"
return self.row_by_id.get(row_id)
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def __len__(self):
"nombre de lignes dans le corps de la table"
return len(self.rows)
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def is_empty(self) -> bool:
"true if table has no rows"
return len(self.rows) == 0
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def select_row(self, row_id):
"mark rows as 'selected'"
self.selected_row_id = row_id
def to_list(self) -> list[dict]:
"""as a list, each row is a dict (sans les lignes d'en-tête ni de pied de table)"""
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self._prepare()
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return [row.to_dict() for row in self.rows]
def html(self, extra_classes: list[str] = None) -> str:
"""HTML version of the table"""
self._prepare()
return super().html(extra_classes=extra_classes)
def html_content(self) -> str:
"""Le contenu de la table en html."""
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newline = "\n"
header = (
f"""
<thead>
{ newline.join(row.html() for row in self.head) }
</thead>
"""
if self.head
else ""
)
footer = (
f"""
<tfoot>
{ newline.join(row.html() for row in self.foot) }
</tfoot>
"""
if self.foot
else ""
)
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return f"""
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{header}
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<tbody>
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{
newline.join(row.html() for row in self.rows)
}
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</tbody>
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{footer}
"""
def add_row(self, row: "Row") -> "Row":
"""Append a new row"""
self.rows.append(row)
self.row_by_id[row.id] = row
return row
def add_head_row(self, row: "Row") -> "Row":
"Add a row to table head"
self.head.append(row)
self.row_by_id[row.id] = row
return row
def add_foot_row(self, row: "Row") -> "Row":
"Add a row to table foot"
self.foot.append(row)
self.row_by_id[row.id] = row
return row
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def add_groups_header(self):
"""Insert a header line at the top of the table
with a multicolumn th cell per group
"""
self.sort_columns()
groups_header = RowGroupsHeader(
self, "groups_header", classes=["groups_header"]
)
self.head.insert(0, groups_header)
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def sort_rows(self, key: callable, reverse: bool = False):
"""Sort table rows"""
self.rows.sort(key=key, reverse=reverse)
def sort_columns(self):
"""Sort columns ids"""
groups_order = {group: i for i, group in enumerate(self.groups)}
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cols_order = {col_id: i for i, col_id in enumerate(self.column_ids)}
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self.column_ids.sort(
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key=lambda col_id: (
groups_order.get(self.column_group.get(col_id), col_id),
cols_order[col_id],
)
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)
def insert_group(self, group: str, after: str = None, before: str = None):
"""Déclare un groupe de colonnes et le place avant ou après un autre groupe.
Si pas d'autre groupe indiqué, le place après, à droite du dernier.
Si le group existe déjà, ne fait rien (ne le déplace pas).
"""
if group in self.groups:
return
other = after or before
if other is None:
self.groups.append(group)
else:
if not other in self.groups:
raise ValueError(f"invalid column group '{other}'")
index = self.groups.index(other)
if after:
index += 1
self.groups.insert(index, group)
def set_groups(self, groups: list[str]):
"""Define column groups and set order"""
self.groups = groups
def set_titles(self, titles: dict[str, str]):
"""Set columns titles"""
self.titles = titles
def update_titles(self, titles: dict[str, str]):
"""Set columns titles"""
self.titles.update(titles)
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def add_title(
self, col_id, title: str = None, classes: list[str] = None
) -> tuple["Cell", "Cell"]:
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"""Record this title,
and create cells for footer and header if they don't already exist.
"""
title = title or ""
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if col_id not in self.titles:
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self.titles[col_id] = title
if self.head_title_row:
self.head_title_row.cells[col_id] = self.head_title_row.add_cell(
col_id,
None,
title,
classes=classes,
group=self.column_group.get(col_id),
)
if self.foot_title_row:
self.foot_title_row.cells[col_id] = self.foot_title_row.add_cell(
col_id, None, title, classes=classes
)
head_cell = (
self.head_title_row.cells.get(col_id) if self.head_title_row else None
)
foot_cell = self.foot_title_row.cells[col_id] if self.foot_title_row else None
return head_cell, foot_cell
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def excel(self, wb: Workbook = None):
"""Simple Excel representation of the table."""
self._prepare()
if wb is None:
sheet = sco_excel.ScoExcelSheet(sheet_name=self.xls_sheet_name, wb=wb)
else:
sheet = wb.create_sheet(sheet_name=self.xls_sheet_name)
sheet.rows += self.xls_before_table
style_bold = sco_excel.excel_make_style(bold=True)
style_base = self.xls_style_base or sco_excel.excel_make_style()
for row in self.head:
sheet.append_row(row.to_excel(sheet, style=style_bold))
for row in self.rows:
sheet.append_row(row.to_excel(sheet, style=style_base))
for row in self.foot:
sheet.append_row(row.to_excel(sheet, style=style_base))
if self.caption:
sheet.append_blank_row() # empty line
sheet.append_single_cell_row(self.caption, style_base)
if self.origin:
sheet.append_blank_row() # empty line
sheet.append_single_cell_row(self.origin, style_base)
# Largeurs des colonnes
for col_id, width in self.xls_columns_width.items():
try:
idx = self.column_ids.index(col_id)
col = get_column_letter(idx + 1)
sheet.set_column_dimension_width(col, width)
except ValueError:
pass
if wb is None:
return sheet.generate()
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class Row(Element):
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"""A row."""
def __init__(
self,
table: Table,
row_id=None,
category=None,
cell_elt: str = None,
classes: list[str] = None,
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attrs: dict[str, str] = None,
data: dict = None,
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):
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super().__init__("tr", classes=classes, attrs=attrs, data=data)
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self.category = category
self.cells = {}
self.cell_elt = cell_elt
self.classes: list[str] = classes or []
"classes sur le <tr>"
self.id = row_id
self.table = table
def add_cell(
self,
col_id: str,
title: str,
content: str,
group: str = None,
attrs: list[str] = None,
classes: list[str] = None,
data: dict[str, str] = None,
elt: str = None,
raw_content=None,
target_attrs: dict = None,
target: str = None,
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column_classes: set[str] = None,
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) -> "Cell":
"""Create cell and add it to the row.
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group: groupe de colonnes
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classes is a list of css class names
"""
classes = classes.copy() if classes else []
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if group:
self.table.column_classes[col_id].add(group)
if column_classes:
self.table.column_classes[col_id].update(column_classes)
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cell = Cell(
content,
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classes,
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elt=elt or self.cell_elt,
attrs=attrs,
data=data,
raw_content=raw_content,
target=target,
target_attrs=target_attrs,
)
return self.add_cell_instance(col_id, cell, column_group=group, title=title)
def add_cell_instance(
self, col_id: str, cell: "Cell", column_group: str = None, title: str = None
) -> "Cell":
"""Add a cell to the row.
Si title est None, il doit avoir été ajouté avec table.add_title().
"""
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cell.data["group"] = column_group or ""
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self.cells[col_id] = cell
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if col_id not in self.table.column_ids:
self.table.column_ids.append(col_id)
self.table.insert_group(column_group)
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if column_group is not None:
self.table.column_group[col_id] = column_group
if title is not None:
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self.table.add_title(col_id, title, classes=cell.classes)
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return cell
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def html(self, extra_classes: list[str] = None) -> str:
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"""html for row, with cells"""
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if (self.id is not None) and self.id == getattr(self.table, "selected_row_id"):
self.classes.append("row_selected")
return super().html(extra_classes=extra_classes)
def html_content(self) -> str:
"Le contenu du row en html."
return "".join(
[
self.cells.get(col_id, self.table.empty_cell).html(
extra_classes=self.table.column_classes.get(col_id)
)
for col_id in self.table.column_ids
]
)
def to_dict(self) -> dict:
"""row as a dict, with only cell contents"""
return {
col_id: self.cells.get(col_id, self.table.empty_cell).raw_content
for col_id in self.table.column_ids
}
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def to_excel(self, sheet, style=None) -> list:
"build excel row for given sheet"
return sheet.make_row(self.to_dict().values(), style=style)
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class BottomRow(Row):
"""Une ligne spéciale pour le pied de table
avec un titre à gauche
(répété sur les colonnes indiquées par left_title_col_ids),
et automatiquement ajouté au footer.
"""
def __init__(
self, *args, left_title_col_ids: list[str] = None, left_title=None, **kwargs
):
super().__init__(*args, **kwargs)
self.left_title_col_ids = left_title_col_ids
if left_title is not None:
self.set_left_title(left_title)
self.table.add_foot_row(self)
def set_left_title(self, title: str = ""):
"Fill left title cells"
for col_id in self.left_title_col_ids:
self.add_cell(col_id, None, title)
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class Cell(Element):
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"""Une cellule de table"""
def __init__(
self,
content,
classes: list[str] = None,
elt="td",
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attrs: dict[str, str] = None,
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data: dict = None,
raw_content=None,
target: str = None,
target_attrs: dict = None,
):
"""if specified, raw_content will be used for raw exports like xlsx"""
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super().__init__(
elt if elt is not None else "td", content, classes, attrs, data
)
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if self.elt == "th":
self.attrs["scope"] = "row"
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self.data = data.copy() if data else {}
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self.raw_content = raw_content or content
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self.target = target
self.target_attrs = target_attrs or {}
@classmethod
def empty(cls):
"create a new empty cell"
return cls("")
def __str__(self):
return str(self.content)
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def html_content(self) -> str:
"content of the table cell, as html"
# entoure le contenu par un lien ?
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if (self.target is not None) or self.target_attrs:
href = f'href="{self.target}"' if self.target else ""
target_attrs_str = " ".join(
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[f'{k}="{v}"' for (k, v) in self.target_attrs.items()]
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)
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return f"<a {href} {target_attrs_str}>{super().html_content()}</a>"
return super().html_content()
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class RowGroupsHeader(Row):
"""Header line at the top of the table
with a multicolumn th cell per group
"""
def html_content(self):
"""Le contenu est généré intégralement ici: un th par groupe contigu
Note: les colonnes doivent avoir déjà été triées par table.sort_columns()
"""
column_ids = self.table.column_ids
nb_cols = len(self.table.column_ids)
elements = []
idx = 0
while idx < nb_cols:
group_title = self.table.group_titles.get(
self.table.column_group.get(column_ids[idx])
)
colspan = 1
idx += 1
# on groupe tant que les TITRES des groupes sont identiques
while idx < nb_cols and group_title == self.table.group_titles.get(
self.table.column_group.get(column_ids[idx])
):
idx += 1
colspan += 1
elements.append(f"""<th colspan="{colspan}">{group_title or ""}</th>""")
return "\n".join(elements) if len(elements) > 1 else ""