1 | CREATE or REPLACE FUNCTION legacy_privilege_to_bits( TEXT ) RETURNS BIT(24) AS $$ |
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2 | DECLARE |
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3 | in_priv ALIAS FOR $1; |
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4 | out_bits BIT(24); |
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5 | BEGIN |
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6 | out_bits := 0::BIT(24); |
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7 | IF in_priv ~* 'A' THEN |
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8 | out_bits = ~ out_bits; |
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9 | RETURN out_bits; |
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10 | END IF; |
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11 | |
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12 | -- The CALDAV:read-free-busy privilege MUST be aggregated in the DAV:read privilege. |
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13 | -- 1 DAV:read |
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14 | -- 512 CalDAV:read-free-busy |
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15 | -- 4096 CALDAV:schedule-query-freebusy |
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16 | IF in_priv ~* 'R' THEN |
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17 | out_bits := out_bits | 4609::BIT(24); |
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18 | END IF; |
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19 | |
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20 | -- DAV:write => DAV:write MUST contain DAV:bind, DAV:unbind, DAV:write-properties and DAV:write-content |
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21 | -- 2 DAV:write-properties |
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22 | -- 4 DAV:write-content |
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23 | -- 64 DAV:bind |
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24 | -- 128 DAV:unbind |
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25 | IF in_priv ~* 'W' THEN |
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26 | out_bits := out_bits | 198::BIT(24); |
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27 | END IF; |
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28 | |
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29 | -- 64 DAV:bind |
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30 | IF in_priv ~* 'B' THEN |
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31 | out_bits := out_bits | 64::BIT(24); |
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32 | END IF; |
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33 | |
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34 | -- 128 DAV:unbind |
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35 | IF in_priv ~* 'U' THEN |
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36 | out_bits := out_bits | 128::BIT(24); |
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37 | END IF; |
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38 | |
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39 | -- 512 CalDAV:read-free-busy |
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40 | -- 4096 CALDAV:schedule-query-freebusy |
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41 | IF in_priv ~* 'F' THEN |
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42 | out_bits := out_bits | 4608::BIT(24); |
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43 | END IF; |
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44 | |
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45 | RETURN out_bits; |
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46 | END |
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47 | $$ |
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48 | LANGUAGE 'PlPgSQL' IMMUTABLE STRICT; |
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49 | |
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50 | -- This legacy conversion function will eventually be removed, once all logic |
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51 | -- has been converted to use bitmaps, or to use the bits_to_priv() output. |
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52 | -- |
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53 | -- NOTE: Round-trip through this and then back through legacy_privilege_to_bits |
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54 | -- function is lossy! Through legacy_privilege_to_bits() and back through |
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55 | -- this one is not. |
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56 | -- |
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57 | CREATE or REPLACE FUNCTION bits_to_legacy_privilege( BIT(24) ) RETURNS TEXT AS $$ |
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58 | DECLARE |
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59 | in_bits ALIAS FOR $1; |
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60 | out_priv TEXT; |
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61 | BEGIN |
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62 | out_priv := ''; |
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63 | IF in_bits = (~ 0::BIT(24)) THEN |
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64 | out_priv = 'A'; |
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65 | RETURN out_priv; |
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66 | END IF; |
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67 | |
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68 | -- The CALDAV:read-free-busy privilege MUST be aggregated in the DAV:read privilege. |
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69 | -- 1 DAV:read |
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70 | -- 512 CalDAV:read-free-busy |
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71 | -- 4096 CALDAV:schedule-query-freebusy |
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72 | IF (in_bits & 4609::BIT(24)) != 0::BIT(24) THEN |
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73 | IF (in_bits & 1::BIT(24)) != 0::BIT(24) THEN |
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74 | out_priv := 'R'; |
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75 | ELSE |
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76 | out_priv := 'F'; |
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77 | END IF; |
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78 | END IF; |
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79 | |
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80 | -- DAV:write => DAV:write MUST contain DAV:bind, DAV:unbind, DAV:write-properties and DAV:write-content |
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81 | -- 2 DAV:write-properties |
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82 | -- 4 DAV:write-content |
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83 | -- 64 DAV:bind |
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84 | -- 128 DAV:unbind |
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85 | IF (in_bits & 198::BIT(24)) != 0::BIT(24) THEN |
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86 | IF (in_bits & 6::BIT(24)) != 0::BIT(24) THEN |
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87 | out_priv := out_priv || 'W'; |
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88 | ELSE |
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89 | IF (in_bits & 64::BIT(24)) != 0::BIT(24) THEN |
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90 | out_priv := out_priv || 'B'; |
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91 | END IF; |
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92 | IF (in_bits & 128::BIT(24)) != 0::BIT(24) THEN |
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93 | out_priv := out_priv || 'U'; |
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94 | END IF; |
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95 | END IF; |
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96 | END IF; |
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97 | |
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98 | RETURN out_priv; |
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99 | END |
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100 | $$ |
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101 | LANGUAGE 'PlPgSQL' IMMUTABLE STRICT; |
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102 | |
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103 | CREATE or REPLACE FUNCTION get_permissions( INT, INT ) RETURNS TEXT AS $$ |
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104 | DECLARE |
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105 | in_from ALIAS FOR $1; |
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106 | in_to ALIAS FOR $2; |
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107 | out_confers TEXT; |
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108 | bit_confers BIT(24); |
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109 | group_role_no INT; |
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110 | tmp_txt TEXT; |
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111 | dbg TEXT DEFAULT ''; |
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112 | r RECORD; |
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113 | counter INT; |
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114 | BEGIN |
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115 | -- Self can always have full access |
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116 | IF in_from = in_to THEN |
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117 | RETURN 'A'; |
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118 | END IF; |
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119 | |
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120 | -- dbg := 'S-'; |
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121 | SELECT bits_to_legacy_privilege(r1.confers) INTO out_confers FROM relationship r1 |
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122 | WHERE r1.from_user = in_from AND r1.to_user = in_to AND NOT usr_is_role(r1.to_user,'Group'); |
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123 | IF FOUND THEN |
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124 | RETURN dbg || out_confers; |
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125 | END IF; |
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126 | -- RAISE NOTICE 'No simple relationships between % and %', in_from, in_to; |
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127 | |
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128 | SELECT bit_or(r1.confers & r2.confers) INTO bit_confers |
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129 | FROM relationship r1 |
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130 | JOIN relationship r2 ON r1.to_user=r2.from_user |
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131 | WHERE r1.from_user=in_from AND r2.to_user=in_to |
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132 | AND r2.from_user IN (SELECT user_no FROM roles LEFT JOIN role_member USING(role_no) WHERE role_name='Group'); |
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133 | IF bit_confers != 0::BIT(24) THEN |
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134 | RETURN dbg || bits_to_legacy_privilege(bit_confers); |
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135 | END IF; |
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136 | |
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137 | RETURN ''; |
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138 | -- RAISE NOTICE 'No complex relationships between % and %', in_from, in_to; |
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139 | |
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140 | SELECT bits_to_legacy_privilege(r1.confers) INTO out_confers FROM relationship r1 LEFT OUTER JOIN relationship r2 ON(r1.to_user = r2.to_user) |
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141 | WHERE r1.from_user = in_from AND r2.from_user = in_to AND r1.from_user != r2.from_user |
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142 | AND NOT EXISTS( SELECT 1 FROM relationship r3 WHERE r3.from_user = r1.to_user ) ; |
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143 | |
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144 | IF FOUND THEN |
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145 | -- dbg := 'H-'; |
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146 | -- RAISE NOTICE 'Permissions to shared group % ', out_confers; |
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147 | RETURN dbg || out_confers; |
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148 | END IF; |
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149 | |
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150 | -- RAISE NOTICE 'No common group relationships between % and %', in_from, in_to; |
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151 | |
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152 | RETURN ''; |
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153 | END; |
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154 | $$ LANGUAGE 'plpgsql' IMMUTABLE STRICT; |
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155 | |
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156 | |
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157 | CREATE or REPLACE FUNCTION get_group_role_no() RETURNS INT AS $$ |
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158 | SELECT role_no FROM roles WHERE role_name = 'Group' |
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159 | $$ LANGUAGE 'SQL' IMMUTABLE; |
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160 | |
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161 | CREATE or REPLACE FUNCTION has_legacy_privilege( INT, TEXT, INT ) RETURNS BOOLEAN AS $$ |
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162 | DECLARE |
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163 | in_from ALIAS FOR $1; |
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164 | in_legacy_privilege ALIAS FOR $2; |
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165 | in_to ALIAS FOR $3; |
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166 | in_confers BIT(24); |
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167 | group_role_no INT; |
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168 | BEGIN |
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169 | -- Self can always have full access |
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170 | IF in_from = in_to THEN |
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171 | RETURN TRUE; |
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172 | END IF; |
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173 | |
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174 | SELECT get_group_role_no() INTO group_role_no; |
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175 | SELECT legacy_privilege_to_bits(in_legacy_privilege) INTO in_confers; |
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176 | |
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177 | IF EXISTS(SELECT 1 FROM relationship WHERE from_user = in_from AND to_user = in_to |
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178 | AND (in_confers & confers) = in_confers |
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179 | AND NOT EXISTS(SELECT 1 FROM role_member WHERE to_user = user_no AND role_no = group_role_no) ) THEN |
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180 | -- A direct relationship from A to B that grants sufficient |
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181 | -- RAISE NOTICE 'Permissions directly granted'; |
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182 | RETURN TRUE; |
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183 | END IF; |
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184 | |
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185 | IF EXISTS( SELECT 1 FROM relationship r1 JOIN relationship r2 ON r1.to_user=r2.from_user |
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186 | WHERE (in_confers & r1.confers & r2.confers) = in_confers |
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187 | AND r1.from_user=in_from AND r2.to_user=in_to |
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188 | AND r2.from_user IN (SELECT user_no FROM role_member WHERE role_no=group_role_no) ) THEN |
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189 | -- An indirect relationship from A to B via group G that grants sufficient |
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190 | -- RAISE NOTICE 'Permissions mediated via group'; |
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191 | RETURN TRUE; |
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192 | END IF; |
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193 | |
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194 | IF EXISTS( SELECT 1 FROM relationship r1 JOIN relationship r2 ON r1.to_user=r2.to_user |
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195 | WHERE (in_confers & r1.confers & r2.confers) = in_confers |
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196 | AND r1.from_user=in_from AND r2.from_user=in_to |
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197 | AND r2.to_user IN (SELECT user_no FROM role_member WHERE role_no=group_role_no) |
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198 | AND NOT EXISTS(SELECT 1 FROM relationship WHERE from_user=r2.to_user) ) THEN |
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199 | -- An indirect reflexive relationship from both A & B to group G which grants sufficient |
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200 | -- RAISE NOTICE 'Permissions to shared group'; |
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201 | RETURN TRUE; |
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202 | END IF; |
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203 | |
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204 | -- RAISE NOTICE 'No common group relationships between % and %', in_from, in_to; |
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205 | |
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206 | RETURN FALSE; |
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207 | END; |
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208 | $$ LANGUAGE 'plpgsql' IMMUTABLE STRICT; |
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209 | |
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210 | |
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211 | -- Given a verbose DAV: or CalDAV: privilege name return the bitmask |
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212 | CREATE or REPLACE FUNCTION privilege_to_bits( TEXT ) RETURNS BIT(24) AS $$ |
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213 | DECLARE |
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214 | raw_priv ALIAS FOR $1; |
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215 | in_priv TEXT; |
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216 | BEGIN |
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217 | in_priv := trim(lower(regexp_replace(raw_priv, '^.*:', ''))); |
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218 | IF in_priv = 'all' THEN |
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219 | RETURN ~ 0::BIT(24); |
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220 | END IF; |
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221 | |
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222 | RETURN (CASE |
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223 | WHEN in_priv = 'read' THEN 4609 -- 1 + 512 + 4096 |
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224 | WHEN in_priv = 'write' THEN 198 -- 2 + 4 + 64 + 128 |
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225 | WHEN in_priv = 'write-properties' THEN 2 |
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226 | WHEN in_priv = 'write-content' THEN 4 |
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227 | WHEN in_priv = 'unlock' THEN 8 |
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228 | WHEN in_priv = 'read-acl' THEN 16 |
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229 | WHEN in_priv = 'read-current-user-privilege-set' THEN 32 |
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230 | WHEN in_priv = 'bind' THEN 64 |
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231 | WHEN in_priv = 'unbind' THEN 128 |
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232 | WHEN in_priv = 'write-acl' THEN 256 |
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233 | WHEN in_priv = 'read-free-busy' THEN 4608 -- 512 + 4096 |
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234 | WHEN in_priv = 'schedule-deliver' THEN 7168 -- 1024 + 2048 + 4096 |
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235 | WHEN in_priv = 'schedule-deliver-invite' THEN 1024 |
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236 | WHEN in_priv = 'schedule-deliver-reply' THEN 2048 |
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237 | WHEN in_priv = 'schedule-query-freebusy' THEN 4096 |
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238 | WHEN in_priv = 'schedule-send' THEN 57344 -- 8192 + 16384 + 32768 |
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239 | WHEN in_priv = 'schedule-send-invite' THEN 8192 |
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240 | WHEN in_priv = 'schedule-send-reply' THEN 16384 |
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241 | WHEN in_priv = 'schedule-send-freebusy' THEN 32768 |
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242 | ELSE 0 END)::BIT(24); |
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243 | END |
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244 | $$ |
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245 | LANGUAGE 'PlPgSQL' IMMUTABLE STRICT; |
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246 | |
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247 | |
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248 | -- Given an array of verbose DAV: or CalDAV: privilege names return the bitmask |
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249 | CREATE or REPLACE FUNCTION privilege_to_bits( TEXT[] ) RETURNS BIT(24) AS $$ |
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250 | DECLARE |
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251 | raw_privs ALIAS FOR $1; |
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252 | in_priv TEXT; |
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253 | out_bits BIT(24); |
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254 | i INT; |
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255 | all BIT(24); |
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256 | start INT; |
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257 | finish INT; |
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258 | BEGIN |
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259 | out_bits := 0::BIT(24); |
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260 | all := ~ out_bits; |
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261 | SELECT array_lower(raw_privs,1) INTO start; |
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262 | SELECT array_upper(raw_privs,1) INTO finish; |
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263 | FOR i IN start .. finish LOOP |
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264 | SELECT out_bits | privilege_to_bits(raw_privs[i]) INTO out_bits; |
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265 | IF out_bits = all THEN |
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266 | RETURN all; |
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267 | END IF; |
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268 | END LOOP; |
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269 | RETURN out_bits; |
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270 | END |
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271 | $$ |
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272 | LANGUAGE 'PlPgSQL' IMMUTABLE STRICT; |
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273 | |
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274 | |
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275 | -- This legacy conversion function will eventually be removed, once all logic |
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276 | -- has been converted to use bitmaps, or to use the bits_to_priv() output. |
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277 | -- |
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278 | -- NOTE: Round-trip through this and then back through privilege_to_bits |
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279 | -- function is lossy! Through privilege_to_bits() and back through |
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280 | -- this one is not. |
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281 | -- |
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282 | CREATE or REPLACE FUNCTION bits_to_privilege( BIT(24) ) RETURNS TEXT[] AS $$ |
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283 | DECLARE |
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284 | in_bits ALIAS FOR $1; |
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285 | out_priv TEXT[]; |
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286 | BEGIN |
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287 | out_priv := ARRAY[]::text[]; |
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288 | IF in_bits = (~ 0::BIT(24)) THEN |
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289 | out_priv := out_priv || ARRAY['DAV:all']; |
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290 | END IF; |
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291 | |
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292 | IF (in_bits & 513::BIT(24)) != 0::BIT(24) THEN |
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293 | IF (in_bits & 1::BIT(24)) != 0::BIT(24) THEN |
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294 | out_priv := out_priv || ARRAY['DAV:read']; |
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295 | END IF; |
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296 | IF (in_bits & 512::BIT(24)) != 0::BIT(24) THEN |
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297 | out_priv := out_priv || ARRAY['caldav:read-free-busy']; |
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298 | END IF; |
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299 | END IF; |
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300 | |
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301 | IF (in_bits & 198::BIT(24)) != 0::BIT(24) THEN |
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302 | IF (in_bits & 198::BIT(24)) = 198::BIT(24) THEN |
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303 | out_priv := out_priv || ARRAY['DAV:write']; |
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304 | ELSE |
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305 | IF (in_bits & 2::BIT(24)) != 0::BIT(24) THEN |
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306 | out_priv := out_priv || ARRAY['DAV:write-properties']; |
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307 | END IF; |
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308 | IF (in_bits & 4::BIT(24)) != 0::BIT(24) THEN |
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309 | out_priv := out_priv || ARRAY['DAV:write-content']; |
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310 | END IF; |
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311 | IF (in_bits & 64::BIT(24)) != 0::BIT(24) THEN |
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312 | out_priv := out_priv || ARRAY['DAV:bind']; |
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313 | END IF; |
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314 | IF (in_bits & 128::BIT(24)) != 0::BIT(24) THEN |
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315 | out_priv := out_priv || ARRAY['DAV:unbind']; |
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316 | END IF; |
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317 | END IF; |
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318 | END IF; |
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319 | |
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320 | IF (in_bits & 8::BIT(24)) != 0::BIT(24) THEN |
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321 | out_priv := out_priv || ARRAY['DAV:unlock']; |
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322 | END IF; |
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323 | |
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324 | IF (in_bits & 16::BIT(24)) != 0::BIT(24) THEN |
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325 | out_priv := out_priv || ARRAY['DAV:read-acl']; |
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326 | END IF; |
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327 | |
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328 | IF (in_bits & 32::BIT(24)) != 0::BIT(24) THEN |
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329 | out_priv := out_priv || ARRAY['DAV:read-current-user-privilege-set']; |
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330 | END IF; |
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331 | |
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332 | IF (in_bits & 256::BIT(24)) != 0::BIT(24) THEN |
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333 | out_priv := out_priv || ARRAY['DAV:write-acl']; |
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334 | END IF; |
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335 | |
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336 | IF (in_bits & 7168::BIT(24)) != 0::BIT(24) THEN |
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337 | IF (in_bits & 7168::BIT(24)) = 7168::BIT(24) THEN |
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338 | out_priv := out_priv || ARRAY['caldav:schedule-deliver']; |
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339 | ELSE |
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340 | IF (in_bits & 1024::BIT(24)) != 0::BIT(24) THEN |
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341 | out_priv := out_priv || ARRAY['caldav:schedule-deliver-invite']; |
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342 | END IF; |
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343 | IF (in_bits & 2048::BIT(24)) != 0::BIT(24) THEN |
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344 | out_priv := out_priv || ARRAY['caldav:schedule-deliver-reply']; |
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345 | END IF; |
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346 | IF (in_bits & 4096::BIT(24)) != 0::BIT(24) THEN |
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347 | out_priv := out_priv || ARRAY['caldav:schedule-query-freebusy']; |
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348 | END IF; |
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349 | END IF; |
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350 | END IF; |
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351 | |
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352 | IF (in_bits & 57344::BIT(24)) != 0::BIT(24) THEN |
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353 | IF (in_bits & 57344::BIT(24)) = 57344::BIT(24) THEN |
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354 | out_priv := out_priv || ARRAY['caldav:schedule-send']; |
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355 | ELSE |
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356 | IF (in_bits & 8192::BIT(24)) != 0::BIT(24) THEN |
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357 | out_priv := out_priv || ARRAY['caldav:schedule-send-invite']; |
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358 | END IF; |
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359 | IF (in_bits & 16384::BIT(24)) != 0::BIT(24) THEN |
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360 | out_priv := out_priv || ARRAY['caldav:schedule-send-reply']; |
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361 | END IF; |
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362 | IF (in_bits & 32768::BIT(24)) != 0::BIT(24) THEN |
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363 | out_priv := out_priv || ARRAY['caldav:schedule-send-freebusy']; |
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364 | END IF; |
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365 | END IF; |
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366 | END IF; |
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367 | |
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368 | RETURN out_priv; |
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369 | END |
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370 | $$ |
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371 | LANGUAGE 'PlPgSQL' IMMUTABLE STRICT; |
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