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# -*- coding: UTF-8 -*- 

# Copyright 2009-2015 Luc Saffre 

# License: BSD (see file COPYING for details) 

 

""" 

 

Summary from <http://en.wikipedia.org/wiki/Restful>:  

 

    On an element: 

 

    - GET : Retrieve a representation of the addressed member of the collection expressed in an appropriate MIME type. 

    - PUT : Update the addressed member of the collection or create it with the specified ID.  

    - POST : Treats the addressed member as a collection and creates a new subordinate of it.  

    - DELETE : Delete the addressed member of the collection.  

 

    On a list: 

 

    - GET : List the members of the collection.  

    - PUT : Replace the entire collection with another collection.  

    - POST : Create a new entry in the collection where the ID is assigned automatically by the collection.  

      The ID created is included as part of the data returned by this operation.  

    - DELETE : Delete the entire collection. 

     

 

 

 

""" 

from builtins import str 

 

import logging 

logger = logging.getLogger(__name__) 

 

from django import http 

from django.db import models 

from django.conf import settings 

from django.views.generic import View 

import json 

from django.utils.translation import ugettext as _ 

from django.utils.encoding import force_text 

 

from lino.api import dd 

 

from lino.utils.xmlgen import html as xghtml 

E = xghtml.E 

 

from lino.utils import ucsv 

from lino.utils import isiterable 

from lino.utils import dblogger 

from lino.core import auth 

 

from lino.core import actions 

from lino.core import dbtables 

 

from lino.core.views import requested_actor, action_request 

from lino.core.views import json_response, json_response_kw 

 

from lino.core import constants 

from lino.core.requests import BaseRequest 

 

MAX_ROW_COUNT = 300 

 

 

class HttpResponseDeleted(http.HttpResponse): 

    status_code = 204 

 

 

def elem2rec_empty(ar, ah, elem, **rec): 

    """ 

    Returns a dict of this record, designed for usage by an EmptyTable. 

    """ 

    #~ rec.update(data=rh.store.row2dict(ar,elem)) 

    rec.update(data=elem._data) 

    #~ rec = elem2rec1(ar,ah,elem) 

    #~ rec.update(title=_("Insert into %s...") % ar.get_title()) 

    rec.update(title=ar.get_action_title()) 

    rec.update(id=-99998) 

    #~ rec.update(id=elem.pk) or -99999) 

    if ar.actor.parameters: 

        #~ rec.update(param_values=ar.ah.store.pv2dict(ar.ui,ar.param_values)) 

        rec.update( 

            param_values=ar.actor.params_layout.params_store.pv2dict( 

                ar.param_values)) 

    return rec 

 

 

def delete_element(ar, elem): 

    if elem is None: 

        raise Warning("Cannot delete None") 

    msg = ar.actor.disable_delete(elem, ar) 

    if msg is not None: 

        ar.error(None, msg, alert=True) 

        return settings.SITE.kernel.render_action_response(ar) 

 

    #~ dblogger.log_deleted(ar.request,elem) 

 

    #~ changes.log_delete(ar.request,elem) 

 

    dd.pre_ui_delete.send(sender=elem, request=ar.request) 

 

    try: 

        elem.delete() 

    except Exception as e: 

        dblogger.exception(e) 

        msg = _("Failed to delete %(record)s : %(error)s." 

                ) % dict(record=dd.obj2unicode(elem), error=e) 

        #~ msg = "Failed to delete %s." % element_name(elem) 

        ar.error(None, msg) 

        return settings.SITE.kernel.render_action_response(ar) 

        #~ raise Http404(msg) 

 

    return HttpResponseDeleted() 

 

 

class AdminIndex(View): 

 

    """ 

    Similar to PlainIndex 

    """ 

 

    def get(self, request, *args, **kw): 

        # logger.info("20150427 AdminIndex.get()") 

        # settings.SITE.startup() 

        renderer = dd.plugins.extjs.renderer 

        # if settings.SITE.user_model is not None: 

        #     user = request.subst_user or request.user 

        #     a = settings.SITE.get_main_action(user) 

        #     if a is not None and a.get_view_permission(user.profile): 

        #         kw.update(on_ready=renderer.action_call(request, a, {})) 

        return http.HttpResponse(renderer.html_page(request, **kw)) 

 

 

class MainHtml(View): 

 

    def get(self, request, *args, **kw): 

        #~ logger.info("20130719 MainHtml") 

        settings.SITE.startup() 

        ui = settings.SITE.kernel 

        #~ raise Exception("20131023") 

        ar = BaseRequest(request) 

        ar.success(html=settings.SITE.get_main_html(request)) 

        return ui.render_action_response(ar) 

 

 

class Authenticate(View): 

    """This view is being used when :setting:`remote_user_header` is 

    empty (and :setting:`user_model` not). 

    :class:`lino.core.auth.SessionUserMiddleware` 

 

    """ 

 

    def get(self, request, *args, **kw): 

        action_name = request.GET.get(constants.URL_PARAM_ACTION_NAME) 

        if action_name == 'logout': 

            username = request.session.pop('username', None) 

            request.session.pop('password', None) 

            #~ username = request.session['username'] 

            #~ del request.session['password'] 

 

            ar = BaseRequest(request) 

            ar.success("User %r logged out." % username) 

            return settings.SITE.kernel.render_action_response(ar) 

        raise http.Http404() 

 

    def post(self, request, *args, **kw): 

        username = request.POST.get('username') 

        password = request.POST.get('password') 

        user = auth.authenticate(username, password) 

        ar = BaseRequest(request) 

        if user is None: 

            ar.error("Could not authenticate %r" % username) 

        else: 

            request.session['username'] = username 

            request.session['password'] = password 

            ar.success(("Now logged in as %r" % username)) 

            # print "20150428 Now logged in as %r (%s)" % (username, user) 

        return settings.SITE.kernel.render_action_response(ar) 

 

 

class RunJasmine(View): 

 

    """ 

    """ 

 

    def get(self, request, *args, **kw): 

        ui = settings.SITE.kernel 

        return http.HttpResponse( 

            ui.extjs_renderer.html_page(request, run_jasmine=True)) 

 

 

class EidAppletService(View): 

 

    """ 

    """ 

 

    def post(self, request, *args, **kw): 

        ui = settings.SITE.kernel 

        return ui.success(html='Hallo?') 

 

 

class Callbacks(View): 

 

    def get(self, request, thread_id, button_id): 

        return settings.SITE.kernel.run_callback(request, thread_id, button_id) 

 

 

def choices_for_field(request, holder, field): 

    # Return the choices for the given field and the given web request 

    # (whose requesting holder is given as `holder`). 

    # holder is either a Model, an Actor or an Action. 

    # model = holder.get_chooser_model() 

    chooser = holder.get_chooser_for_field(field.name) 

    # logger.info('20140822 choices_for_field(%s.%s) --> %s', 

    #             holder, field.name, chooser) 

    if chooser: 

        qs = chooser.get_request_choices(request, holder) 

        if not isiterable(qs): 

            raise Exception("%s.%s_choices() returned non-iterable %r" % ( 

                holder.model, field.name, qs)) 

        if chooser.simple_values: 

            def row2dict(obj, d): 

                d[constants.CHOICES_TEXT_FIELD] = str(obj) 

                d[constants.CHOICES_VALUE_FIELD] = obj 

                return d 

        elif chooser.instance_values: 

            # same code as for ForeignKey 

            def row2dict(obj, d): 

                d[constants.CHOICES_TEXT_FIELD] = holder.get_choices_text( 

                    obj, request, field) 

                d[constants.CHOICES_VALUE_FIELD] = obj.pk 

                return d 

        else:  # values are (value,text) tuples 

            def row2dict(obj, d): 

                d[constants.CHOICES_TEXT_FIELD] = str(obj[1]) 

                d[constants.CHOICES_VALUE_FIELD] = obj[0] 

                return d 

 

    elif field.choices: 

        qs = field.choices 

 

        def row2dict(obj, d): 

            if type(obj) is list or type(obj) is tuple: 

                d[constants.CHOICES_TEXT_FIELD] = str(obj[1]) 

                d[constants.CHOICES_VALUE_FIELD] = obj[0] 

            else: 

                d[constants.CHOICES_TEXT_FIELD] = holder.get_choices_text( 

                    obj, request, field) 

                d[constants.CHOICES_VALUE_FIELD] = str(obj) 

            return d 

 

    elif isinstance(field, models.ForeignKey): 

        m = field.rel.model 

        t = m.get_default_table() 

        qs = t.request(request=request).data_iterator 

        # logger.info('20120710 choices_view(FK) %s --> %s', t, qs.query) 

 

        def row2dict(obj, d): 

            d[constants.CHOICES_TEXT_FIELD] = holder.get_choices_text( 

                obj, request, field) 

            d[constants.CHOICES_VALUE_FIELD] = obj.pk 

            return d 

    else: 

        raise http.Http404("No choices for %s" % field) 

    return (qs, row2dict) 

 

 

def choices_response(request, qs, row2dict, emptyValue): 

    quick_search = request.GET.get(constants.URL_PARAM_FILTER, None) 

    if quick_search is not None: 

        qs = dbtables.add_quick_search_filter(qs, quick_search) 

 

    count = len(qs) 

 

    offset = request.GET.get(constants.URL_PARAM_START, None) 

    if offset: 

        qs = qs[int(offset):] 

        #~ kw.update(offset=int(offset)) 

    limit = request.GET.get(constants.URL_PARAM_LIMIT, None) 

    if limit: 

        #~ kw.update(limit=int(limit)) 

        qs = qs[:int(limit)] 

 

    rows = [row2dict(row, {}) for row in qs] 

    if emptyValue is not None:  # 20121203 

        empty = dict() 

        empty[constants.CHOICES_TEXT_FIELD] = emptyValue 

        empty[constants.CHOICES_VALUE_FIELD] = None 

        rows.insert(0, empty) 

    return json_response_kw(count=count, rows=rows) 

    #~ return json_response_kw(count=len(rows),rows=rows) 

    #~ return json_response_kw(count=len(rows),rows=rows,title=_('Choices for %s') % fldname) 

 

 

class ActionParamChoices(View): 

    # Examples: `welfare.pcsw.CreateCoachingVisit` 

    def get(self, request, app_label=None, actor=None, an=None, field=None, **kw): 

        actor = requested_actor(app_label, actor) 

        ba = actor.get_url_action(an) 

        if ba is None: 

            raise Exception("Unknown action %r for %s" % (an, actor)) 

        field = ba.action.get_param_elem(field) 

        qs, row2dict = choices_for_field(request, ba.action, field) 

        if field.blank: 

            emptyValue = '<br/>' 

        else: 

            emptyValue = None 

        return choices_response(request, qs, row2dict, emptyValue) 

 

 

class Choices(View): 

 

    #~ def choices_view(self,request,app_label=None,rptname=None,fldname=None,**kw): 

    def get(self, request, app_label=None, rptname=None, fldname=None, **kw): 

        """ 

        Return a JSON object with two attributes `count` and `rows`, 

        where `rows` is a list of `(display_text, value)` tuples. 

        Used by ComboBoxes or similar widgets. 

        If `fldname` is not specified, returns the choices for 

        the `record_selector` widget. 

        """ 

        rpt = requested_actor(app_label, rptname) 

        emptyValue = None 

        if fldname is None: 

            ar = rpt.request(request=request)  # ,rpt.default_action) 

            #~ rh = rpt.get_handle(self) 

            #~ ar = ViewReportRequest(request,rh,rpt.default_action) 

            #~ ar = dbtables.TableRequest(self,rpt,request,rpt.default_action) 

            #~ rh = ar.ah 

            #~ qs = ar.get_data_iterator() 

            qs = ar.data_iterator 

            #~ qs = rpt.request(self).get_queryset() 

 

            def row2dict(obj, d): 

                d[constants.CHOICES_TEXT_FIELD] = str(obj) 

                # getattr(obj,'pk') 

                d[constants.CHOICES_VALUE_FIELD] = obj.pk 

                return d 

        else: 

            """ 

            NOTE: if you define a *parameter* with the same name 

            as some existing *data element* name, then the parameter 

            will override the data element. At least here in choices view. 

            """ 

            #~ field = find_field(rpt.model,fldname) 

            field = rpt.get_param_elem(fldname) 

            if field is None: 

                field = rpt.get_data_elem(fldname) 

            if field.blank: 

                #~ logger.info("views.Choices: %r is blank",field) 

                emptyValue = '<br/>' 

            qs, row2dict = choices_for_field(request, rpt, field) 

 

        return choices_response(request, qs, row2dict, emptyValue) 

 

 

class Restful(View): 

 

    """ 

    Used to collaborate with a restful Ext.data.Store. 

    """ 

 

    def post(self, request, app_label=None, actor=None, pk=None): 

        rpt = requested_actor(app_label, actor) 

        ar = rpt.request(request=request) 

 

        instance = ar.create_instance() 

        # store uploaded files. 

        # html forms cannot send files with PUT or GET, only with POST 

        if ar.actor.handle_uploaded_files is not None: 

            ar.actor.handle_uploaded_files(instance, request) 

 

        data = request.POST.get('rows') 

        data = json.loads(data) 

        ar.form2obj_and_save(data, instance, True) 

 

        # Ext.ensible needs list_fields, not detail_fields 

        ar.set_response( 

            rows=[ar.ah.store.row2dict( 

                ar, instance, ar.ah.store.list_fields)]) 

        return json_response(ar.response) 

 

    def delete(self, request, app_label=None, actor=None, pk=None): 

        rpt = requested_actor(app_label, actor) 

        ar = rpt.request(request=request) 

        ar.set_selected_pks(pk) 

        return delete_element(ar, ar.selected_rows[0]) 

 

    def get(self, request, app_label=None, actor=None, pk=None): 

        rpt = requested_actor(app_label, actor) 

        assert pk is None, 20120814 

        ar = rpt.request(request=request) 

        rh = ar.ah 

        rows = [ 

            rh.store.row2dict(ar, row, rh.store.list_fields) 

            for row in ar.sliced_data_iterator] 

        kw = dict(count=ar.get_total_count(), rows=rows) 

        kw.update(title=str(ar.get_title())) 

        return json_response(kw) 

 

    def put(self, request, app_label=None, actor=None, pk=None): 

        rpt = requested_actor(app_label, actor) 

        ar = rpt.request(request=request) 

        ar.set_selected_pks(pk) 

        elem = ar.selected_rows[0] 

        rh = ar.ah 

 

        data = http.QueryDict(request.body).get('rows') 

        data = json.loads(data) 

        a = rpt.get_url_action(rpt.default_list_action_name) 

        ar = rpt.request(request=request, action=a) 

        ar.renderer = settings.SITE.kernel.extjs_renderer 

        ar.form2obj_and_save(data, elem, False) 

        # Ext.ensible needs list_fields, not detail_fields 

        ar.set_response( 

            rows=[rh.store.row2dict(ar, elem, rh.store.list_fields)]) 

        return json_response(ar.response) 

 

NOT_FOUND = "%s has no row with primary key %r" 

 

class ApiElement(View): 

 

    def get(self, request, app_label=None, actor=None, pk=None): 

        ui = settings.SITE.kernel 

        rpt = requested_actor(app_label, actor) 

 

        action_name = request.GET.get(constants.URL_PARAM_ACTION_NAME, 

                                      rpt.default_elem_action_name) 

        ba = rpt.get_url_action(action_name) 

        if ba is None: 

            raise http.Http404("%s has no action %r" % (rpt, action_name)) 

 

        if pk and pk != '-99999' and pk != '-99998': 

            #~ ar = ba.request(request=request,selected_pks=[pk]) 

            #~ print 20131004, ba.actor 

            ar = ba.request(request=request) 

 

            ar.set_selected_pks(pk) 

            elem = ar.selected_rows[0] 

        else: 

            ar = ba.request(request=request) 

            elem = None 

 

        ar.renderer = ui.extjs_renderer 

        ah = ar.ah 

 

        fmt = request.GET.get( 

            constants.URL_PARAM_FORMAT, ba.action.default_format) 

 

        if ba.action.opens_a_window: 

 

            if fmt == constants.URL_FORMAT_JSON: 

                if pk == '-99999': 

                    elem = ar.create_instance() 

                    datarec = ar.elem2rec_insert(ah, elem) 

                elif pk == '-99998': 

                    elem = ar.create_instance() 

                    datarec = elem2rec_empty(ar, ah, elem) 

                elif elem is None: 

                    datarec = dict( 

                        success=False, message=NOT_FOUND % (rpt, pk)) 

                else: 

                    datarec = ar.elem2rec_detailed(elem) 

                return json_response(datarec) 

 

            after_show = ar.get_status(record_id=pk) 

            tab = request.GET.get(constants.URL_PARAM_TAB, None) 

            if tab is not None: 

                tab = int(tab) 

                after_show.update(active_tab=tab) 

 

            return http.HttpResponse( 

                ui.extjs_renderer.html_page( 

                    request, ba.action.label, 

                    on_ready=ui.extjs_renderer.action_call( 

                        request, ba, after_show))) 

 

        if isinstance(ba.action, actions.RedirectAction): 

            target = ba.action.get_target_url(elem) 

            if target is None: 

                raise http.Http404("%s failed for %r" % (ba, elem)) 

            return http.HttpResponseRedirect(target) 

 

        if pk == '-99998': 

            assert elem is None 

            elem = ar.create_instance() 

            ar.selected_rows = [elem] 

        elif elem is None: 

            raise http.Http404(NOT_FOUND % (rpt, pk)) 

        return settings.SITE.kernel.run_action(ar) 

 

    def post(self, request, app_label=None, actor=None, pk=None): 

        ar = action_request( 

            app_label, actor, request, request.POST, True, 

            renderer=settings.SITE.kernel.extjs_renderer) 

        if pk == '-99998': 

            elem = ar.create_instance() 

            ar.selected_rows = [elem] 

        else: 

            ar.set_selected_pks(pk) 

        return settings.SITE.kernel.run_action(ar) 

 

    def put(self, request, app_label=None, actor=None, pk=None): 

        data = http.QueryDict(request.body)  # raw_post_data before Django 1.4 

        # logger.info("20150130 %s", data) 

        ar = action_request( 

            app_label, actor, request, data, False, 

            renderer=settings.SITE.kernel.extjs_renderer) 

        ar.set_selected_pks(pk) 

        return settings.SITE.kernel.run_action(ar) 

 

    def delete(self, request, app_label=None, actor=None, pk=None): 

        data = http.QueryDict(request.body) 

        ar = action_request( 

            app_label, actor, request, data, False, 

            renderer=settings.SITE.kernel.extjs_renderer) 

        ar.set_selected_pks(pk) 

        return settings.SITE.kernel.run_action(ar) 

 

    def old_delete(self, request, app_label=None, actor=None, pk=None): 

        rpt = requested_actor(app_label, actor) 

        ar = rpt.request(request=request) 

        ar.set_selected_pks(pk) 

        elem = ar.selected_rows[0] 

        return delete_element(ar, elem) 

 

 

class ApiList(View): 

 

    def post(self, request, app_label=None, actor=None): 

        ar = action_request(app_label, actor, request, request.POST, True) 

        ar.renderer = settings.SITE.kernel.extjs_renderer 

        return settings.SITE.kernel.run_action(ar) 

 

    def get(self, request, app_label=None, actor=None): 

        ar = action_request(app_label, actor, request, request.GET, True) 

        ar.renderer = settings.SITE.kernel.extjs_renderer 

        rh = ar.ah 

 

        fmt = request.GET.get( 

            constants.URL_PARAM_FORMAT, 

            ar.bound_action.action.default_format) 

 

        if fmt == constants.URL_FORMAT_JSON: 

            rows = [rh.store.row2list(ar, row) 

                    for row in ar.sliced_data_iterator] 

            total_count = ar.get_total_count() 

            for row in ar.create_phantom_rows(): 

                d = rh.store.row2list(ar, row) 

                rows.append(d) 

                total_count += 1 

            kw = dict(count=total_count, 

                      rows=rows, 

                      success=True, 

                      no_data_text=ar.no_data_text, 

                      title=str(ar.get_title())) 

            if ar.actor.parameters: 

                kw.update( 

                    param_values=ar.actor.params_layout.params_store.pv2dict( 

                        ar.param_values)) 

            return json_response(kw) 

 

        if fmt == constants.URL_FORMAT_HTML: 

            after_show = ar.get_status() 

 

            sp = request.GET.get( 

                constants.URL_PARAM_SHOW_PARAMS_PANEL, None) 

            if sp is not None: 

                #~ after_show.update(show_params_panel=sp) 

                after_show.update( 

                    show_params_panel=constants.parse_boolean(sp)) 

 

            # if isinstance(ar.bound_action.action, actions.InsertRow): 

            #     elem = ar.create_instance() 

            #     rec = ar.elem2rec_insert(rh, elem) 

            #     after_show.update(data_record=rec) 

 

            kw = dict(on_ready= 

                      ar.renderer.action_call( 

                          ar.request, 

                          ar.bound_action, after_show)) 

            #~ print '20110714 on_ready', params 

            kw.update(title=ar.get_title()) 

            return http.HttpResponse(ar.renderer.html_page(request, **kw)) 

 

        if fmt == 'csv': 

            #~ response = HttpResponse(mimetype='text/csv') 

            charset = settings.SITE.csv_params.get('encoding', 'utf-8') 

            response = http.HttpResponse( 

                content_type='text/csv;charset="%s"' % charset) 

            if False: 

                response['Content-Disposition'] = \ 

                    'attachment; filename="%s.csv"' % ar.actor 

            else: 

                #~ response = HttpResponse(content_type='application/csv') 

                response['Content-Disposition'] = \ 

                    'inline; filename="%s.csv"' % ar.actor 

 

            #~ response['Content-Disposition'] = 'attachment; filename=%s.csv' % ar.get_base_filename() 

            w = ucsv.UnicodeWriter(response, **settings.SITE.csv_params) 

            w.writerow(ar.ah.store.column_names()) 

            if True:  # 20130418 : also column headers, not only internal names 

                column_names = None 

                fields, headers, cellwidths = ar.get_field_info(column_names) 

                w.writerow(headers) 

 

            for row in ar.data_iterator: 

                w.writerow([str(v) for v in rh.store.row2list(ar, row)]) 

            return response 

 

        if fmt == constants.URL_FORMAT_PRINTER: 

            if ar.get_total_count() > MAX_ROW_COUNT: 

                raise Exception(_("List contains more than %d rows") % 

                                MAX_ROW_COUNT) 

            response = http.HttpResponse( 

                content_type='text/html;charset="utf-8"') 

            doc = xghtml.Document(force_text(ar.get_title())) 

            doc.body.append(E.h1(doc.title)) 

            t = doc.add_table() 

            #~ settings.SITE.kernel.ar2html(ar,t,ar.data_iterator) 

            ar.dump2html(t, ar.data_iterator) 

            doc.write(response, encoding='utf-8') 

            return response 

 

        return settings.SITE.kernel.run_action(ar) 

 

 

class GridConfig(View): 

 

    def put(self, request, app_label=None, actor=None): 

        rpt = requested_actor(app_label, actor) 

        PUT = http.QueryDict(request.body)  # raw_post_data before Django 1.4 

        gc = dict( 

            widths=[int(x) 

                    for x in PUT.getlist(constants.URL_PARAM_WIDTHS)], 

            columns=[str(x) 

                     for x in PUT.getlist(constants.URL_PARAM_COLUMNS)], 

            hiddens=[(x == 'true') 

                     for x in PUT.getlist(constants.URL_PARAM_HIDDENS)], 

            #~ hidden_cols=[str(x) for x in PUT.getlist('hidden_cols')], 

        ) 

 

        filter = PUT.get('filter', None) 

        if filter is not None: 

            filter = json.loads(filter) 

            gc['filters'] = [constants.dict2kw(flt) for flt in filter] 

 

        name = PUT.get('name', None) 

        if name is None: 

            name = constants.DEFAULT_GC_NAME 

        else: 

            name = int(name) 

 

        gc.update(label=PUT.get('label', "Standard")) 

        try: 

            msg = rpt.save_grid_config(name, gc) 

        except IOError as e: 

            msg = _("Error while saving GC for %(table)s: %(error)s") % dict( 

                table=rpt, error=e) 

            return settings.SITE.kernel.error(None, msg, alert=True) 

        #~ logger.info(msg) 

        settings.SITE.kernel.extjs_renderer.build_site_cache(True) 

        return settings.SITE.kernel.success(msg)