forked from hans/Nominatim
119 lines
4.2 KiB
Lua
119 lines
4.2 KiB
Lua
-- Prints taginfo project description in the standard output
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--
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-- create fake "osm2pgsql" table for flex-base, originally created by the main C++ program
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osm2pgsql = {}
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function osm2pgsql.define_table(...) end
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-- provide path to flex-style lua file
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package.path = arg[0]:match("(.*/)") .. "?.lua;" .. package.path
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local flex = require('import-' .. (arg[1] or 'extratags'))
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local json = require ('dkjson')
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local NAME_DESCRIPTIONS = {
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'Searchable auxiliary name of the place',
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main = 'Searchable primary name of the place',
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house = 'House name part of an address, searchable'
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}
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local ADDRESS_DESCRIPTIONS = {
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'Used to determine the address of a place',
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main = 'Primary key for an address point',
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postcode = 'Used to determine the postcode of a place',
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country = 'Used to determine country of a place (only if written as two-letter code)',
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interpolation = 'Primary key for an address interpolation line'
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}
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------------ helper functions ---------------------
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-- Sets the key order for the resulting JSON table
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local function set_keyorder(table, order)
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setmetatable(table, {
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__jsonorder = order
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})
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end
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local function get_key_description(key, description)
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local desc = {}
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desc.key = key
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desc.description = description
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set_keyorder(desc, {'key', 'description'})
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return desc
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end
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local function get_key_value_description(key, value, description)
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local desc = {key = key, value = value, description = description}
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set_keyorder(desc, {'key', 'value', 'description'})
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return desc
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end
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local function group_table_to_keys(tags, data, descriptions)
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for group, values in pairs(data) do
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local desc = descriptions[group] or descriptions[1]
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for _, key in pairs(values) do
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if key:sub(1, 1) ~= '*' and key:sub(#key, #key) ~= '*' then
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table.insert(tags, get_key_description(key, desc))
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end
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end
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end
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end
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-- Prints the collected tags in the required format in JSON
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local function print_taginfo()
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local taginfo = flex.get_taginfo()
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local tags = {}
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for k, values in pairs(taginfo.main) do
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if values[1] == nil or values[1] == 'delete' or values[1] == 'extra' then
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for v, group in pairs(values) do
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if type(v) == 'string' and group ~= 'delete' and group ~= 'extra' then
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local text = 'POI/feature in the search database'
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if type(group) ~= 'function' then
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text = 'Fallback ' .. text
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end
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table.insert(tags, get_key_value_description(k, v, text))
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end
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end
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elseif type(values[1]) == 'function' or values[1] == 'fallback' then
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local desc = 'POI/feature in the search database'
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if values[1] == 'fallback' then
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desc = 'Fallback ' .. desc
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end
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local excp = {}
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for v, group in pairs(values) do
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if group == 'delete' or group == 'extra' then
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table.insert(excp, v)
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end
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end
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if next(excp) ~= nil then
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desc = desc .. string.format(' (except for values: %s)',
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table.concat(excp, ', '))
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end
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table.insert(tags, get_key_description(k, desc))
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end
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end
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group_table_to_keys(tags, taginfo.name, NAME_DESCRIPTIONS)
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group_table_to_keys(tags, taginfo.address, ADDRESS_DESCRIPTIONS)
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local format = {
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data_format = 1,
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data_url = 'https://nominatim.openstreetmap.org/taginfo.json',
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project = {
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name = 'Nominatim',
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description = 'OSM search engine.',
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project_url = 'https://nominatim.openstreetmap.org',
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doc_url = 'https://nominatim.org/release-docs/develop/',
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contact_name = 'Sarah Hoffmann',
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contact_email = 'lonvia@denofr.de'
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}
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}
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format.tags = tags
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set_keyorder(format, {'data_format', 'data_url', 'project', 'tags'})
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set_keyorder(format.project, {'name', 'description', 'project_url', 'doc_url',
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'contact_name', 'contact_email'})
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print(json.encode(format))
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end
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print_taginfo()
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