1 | <?php |
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2 | |
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3 | /** |
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4 | * @file |
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5 | * Field classes. |
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6 | * |
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7 | * These classes are always used together, so we keep them in the same file. |
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8 | */ |
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9 | |
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10 | /** |
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11 | * Base class for Views Or field handlers. |
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12 | */ |
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13 | class views_or_handler_field extends views_handler_field { |
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14 | /** |
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15 | * Set default values for form elements. |
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16 | */ |
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17 | function option_definition() { |
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18 | $options['exclude'] = array('default' => TRUE); |
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19 | return $options; |
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20 | } |
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21 | |
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22 | /** |
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23 | * Remove unnecessary form elements. |
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24 | */ |
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25 | function options_form(&$form, &$form_state) { |
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26 | $form['relationship']['#access'] = FALSE; |
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27 | } |
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28 | |
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29 | /** |
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30 | * Remove advanced rendering options from form. |
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31 | */ |
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32 | function allow_advanced_render() { |
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33 | return FALSE; |
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34 | } |
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35 | } |
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36 | |
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37 | /** |
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38 | * Field handler to start a group of alternatives. |
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39 | */ |
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40 | class views_or_handler_field_begin_alternatives extends views_or_handler_field { |
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41 | /** |
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42 | * Save existing fields and start a new field group. |
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43 | */ |
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44 | function query() { |
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45 | $base = $this->query->base_field; |
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46 | $fields = $this->query->fields; |
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47 | if (isset($fields[$base])) { |
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48 | $this->query->fields = array($base => $fields[$base]); |
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49 | unset($fields[$base]); |
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50 | } |
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51 | else { |
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52 | $this->query->fields = array(); |
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53 | } |
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54 | $this->query->views_or = $fields; |
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55 | } |
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56 | |
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57 | /** |
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58 | * Replace individual fields in the output with the COALESCE group. |
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59 | */ |
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60 | function pre_render($values) { |
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61 | $coalesce = FALSE; |
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62 | foreach ($this->view->field as $id => $field) { |
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63 | if ($field->field == 'views_or_begin') { |
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64 | $coalesce = TRUE; // We are in a COALESCE group. |
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65 | $first = FALSE; // This is not the first field in the group. |
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66 | } |
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67 | if ($coalesce) { |
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68 | if (!$first) { |
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69 | // Remove all fields except the first. |
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70 | unset($this->view->field[$id]); |
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71 | } |
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72 | // The next field will be the first in the group. |
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73 | $first = $field->field == 'views_or_begin' ? TRUE : FALSE; |
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74 | } |
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75 | if ($field->field == 'views_or_end') { |
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76 | $coalesce = FALSE; // We have reached the end of the COALESCE group. |
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77 | } |
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78 | } |
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79 | } |
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80 | } |
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81 | |
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82 | /** |
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83 | * Field handler to end a group of alternatives. |
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84 | */ |
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85 | class views_or_handler_field_end_alternatives extends views_or_handler_field { |
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86 | /** |
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87 | * Replace individual fields in the query with the COALESCE group. |
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88 | */ |
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89 | function query() { |
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90 | $base = $this->query->base_field; |
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91 | $fields = $this->query->fields; |
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92 | if (isset($fields[$base])) { |
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93 | $this->query->fields = array($base => $fields[$base]); |
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94 | unset($fields[$base]); |
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95 | } |
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96 | $this->query->fields = array_merge($this->query->fields, $this->query->views_or); |
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97 | if (!empty($fields)) { |
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98 | $coalesce = array(); |
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99 | $alias = NULL; |
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100 | foreach ($fields as $field) { |
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101 | $coalesce[] = "$field[table].$field[field]"; |
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102 | $alias = isset($alias) ? $alias : $field['alias']; |
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103 | } |
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104 | $this->query->add_field(NULL, 'COALESCE('. implode(', ', $coalesce) .')', $alias); |
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105 | } |
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106 | } |
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107 | } |
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